Should a check valve be installed between the submersible well pump and the pressure (bladder) tank? I know that all (oe most) submersible pumps have built in check valves but there seems to be some conflicting information as to whether a second check valve helps or could cause problems. Pressure Tanks As the name implies, a pressure tank contains water under pressure. Hi, I know this forum isnt about wells but figured id try, Right now onmy pressure tank for my well I think there is a 20 40 pressure switch, I know they make a 30 50 switch and a 40 60 switch which should I go with?. Once again completely drain the tank, charge the tank bladder with 18 psi air (if 20 psi is the desired cut on pressure). Maintaining proper air pressure in the tank allows for efficient and steady water pressure. Then, using a bicycle pump or air compressor, apply about 30 psi air pressure to the system. As this article has shown you, Buying 24 Dual Valve Co2 Fill Station for Filling Soda Tank with 3000psi Gauge has many benefits. One of the largest charging tanks available in the marketplace, the Air Venturi Carbon Fiber Charging Tank weighs much less than a steel scuba tank. The pressure test is conducted by pumping fresh water, brine or drilling mud into the well to gradually increase the pressure. Turn off power to well pump. If a gate valve is to be install between Pump and Tank it is recommended the pipe size and gate valve be increased to 1 ½ times of the intake of the pump. That could cause the mixed air and propane to exceed the pressure relief valve trip pressure, and have a sudden release of propane, that at least will get your attention, and at worst, with an ignition source, could ignite. If the expansion tank is missing or not operating properly, pressure in the system may cause the boiler's pressure relief valve to vent water. Most likely cause- you'd only have good pressure when the pump was actually on, because you can't compress water. Setting the Tank The pressure tank needs to sit on a solid surface. The RO tank has a bladder inside, and this bladder separates air from water. Remove protective air valve cap. How can I determine if well pressure tank pressure loss is from leaking bladder or problem in well? House disconnect from system via shutoff valve. expansion should be absorbed by an expansion tank, or other pressure relief device, as per the local plumbing codes.



I appreciate all the input Don't know if I'll work at it this weekend, or put it off a bit longer, but. Plumb Eeze by Boshart 1 x 11 Tank Tee Kit with VALVES Installation Water Well Pressure Tank 30/50 FSG2 pressure switch NO LEAD. The RO tank has a bladder inside, and this bladder separates air from water. Why is that? Well, the one thing that isn’t offset is the temperature & pressure relief valve on the right-front side of the tank. Made from Acetal resin plastic, they are lead free, non-corrosive, non. com: Well Pressure Tank. The experts at GW prefer to install the pressure tank after the retention tank to keep flow going past the injector fitting during normal system operation. Pump turned off. Call toll free today: 1-877-655-5100 to speak to one of our friendly and knowledgeable Pump and Well Specialists. Have checked all the lines, filter at the pump and have checked the motor all seems to be working well and clear. The check valve or foot valve prevents the well pressure tank from sending water back down into the well after it has built up with water pressure. This allows the well pump to remain off for a longer period of time between cycles. Elbi manufactures high quality Diaphragm Pressure Tanks ranging from 2 to 132 Gallons for the water well industry out of our Houston, TX plant. Often you have to replace a tank if its bladder fails. If you find that water is leaking from the valve you may have a ruptured bladder and the tank will need to be replaced. The valve and seat are designed to never be able to completely seal. Open the hot water supply valve to fill the tank, purging air through the open hot water taps. It is not proper or correct to put a check valve in the pressure tank connection.



We'll need to have a pressure gage to know how the system is performing, and a pressure-relief valve (PRV) to protect the system, in case the pump controls fail and the system starts to build too much pressure. • Domestic well water systems • Irrigation and sprinkler systems • Dewatering Flomatic Auto-Drain Valve. When I looked at the old installtion, I noted that. (Section G) On pump installations, a Check Valve installed near the tank inlet holds water in the tank when the pump is idle. Not finding what you're looking for? Save well water pressure tank relief valve to get e-mail alerts and updates on your eBay Feed. But the basics are: suction tube from the well, check valve to keep well primed, pump, bladder tank to create pressure and that's about it. When the pressure inside your hot water tank builds up to the danger level the pressure relief valve releases the pressure. The air valve to check the pressure is located on the side or on the bottom of most RO tanks. ♦ In-Well Technologies. This tube channels the hot water down to the floor. With dozens of possible applications such as use in storage tanks, watering troughs, greenhouse watering and tank-fed gardening, as well as maintaining pond water levels - we have sold these to manufacturers and homeowners alike. What are you thoughts?. Tank replacement tips. A Check Valve Is Required For A Water Well. If the expansion tank fails, then when the water heats up in the system, the pressure will build up and cause the valve to open. Plumb Eeze by Boshart BRASS NO LEAD 75 PSI PRESSURE RELIEF VALVE 1/2 for WATER WELL PUMP PRESSURE TANK (1/2 75 psi) 🎧 Enter Around The Best Professional Secrets About Plumb Eeze by Boshart BRASS NO LEAD 75 PSI PRESSURE RELIEF VALVE 1/2 for WATER WELL PUMP PRESSURE TANK (1/2 75 psi) Buying.



Carefully close the drain valve as much as possible without forcing this valve shut. To adjust the pressure tank, first turn off the circuit breaker, which supplies power to the well pump. All water tank systems have a rubber bladder that helps regulate water pressure. No non-return valves, strainers or filters are to be fitted between Pump and Tank. Installing an additional water pressure tank will give your system more capacity, and therefore the demand for a pump start will be less frequent. The default setting for most tanks is 28 psi, but it could be lower if it was set to match the. Buy a larger pressure tank. If the valve is then closed the pressure will jump back to 30PSI and then slowly climb back up to 50 before turning off. This is a vertical tank. A well system will have at a minimum a well pump (in the photo above the well pump is submersed in the well), supply pipes, a pressure switch to tell the pump when to turn on and off, power to operate the pump, a power shut off (not shown) and a water shut off valve. If pressure is increasing after the pump shuts down, then either the volume of that system is DEcreasing (pipes magically getting smaller), the supply valve is leaking pressure into the system (pump having pressurized the lines upstream from the inlet valve, *or* the water is getting "bigger". Relief valves are spring-controlled. Note: If water DOES come out the Air Valve Stem when you check it, then just go buy a new Pressure Tank ( sold at all plumbing supply outlets and easy to install ). In order to re-pressurize your system properly you must know the cut in and cut out pressure settings. We'll need to have a pressure gage to know how the system is performing, and a pressure-relief valve (PRV) to protect the system, in case the pump controls fail and the system starts to build too much pressure. I wanted the tank to be higher off the ground than the previous one, so I could get a pail under the drain valve.



Bladder-style pressure tanks come already charged by the manufacturer, and you'll usually find the factory air pressure displayed on a label on the well air tank. Verify 100% if you do OR don't have a leak in your pressure tank bladder. The standard air charge for undersink RO tanks is about seven psi when there is no water in the tank. On shallow well units install the pressure gauge on suction side. Along with annual testing to ensure the health of your water, annual inspection of your wells components is important. The valve and seat are designed to never be able to completely seal. When I looked at the old installtion, I noted that. Find instructions for recharging your pressure tank here. They are used on water well storage tanks that do not have a bladder or membrane between the water and air. (1) When a breaking pin device is used in combination with a reclosing pressure relief valve, the breaking pin must be designed to fail at the start-to-discharge pressure specified in paragraph (b) of this section, and the reclosing pressure relief. A common cause is a failed check valve. As the pump guy said, the irrigation system is usually an afterthought to a well system, and is put on prior to the pressure valve/pressure tank, without any additions made to the system ton compensate or regulate the system for it's additional use for irrigation. Remove protective air valve cap. One benefit is that simple gravity allows the bulk storage tank to operate even during power outages. The pressure tank serves as a water storage tank for the water the well pump sends up to your home. 7391 S Porcupine Lake Rd. It was an example of a Well Tank. Each Low Water Pressure Booster System no longer needs a compact pressure tank to keep pressure up with the new Torrium control. WELL-X-TROL® redefined the industry in 1963 as the first pre-pressurized diaphragm well tank.



These fuel pump modules are most often available only as an assembly. A waterlogged pressure tank is caused by the confined space within the tank having an improper ratio of water to air (too much water, not enough air). Differences Between Degassing Valves, Air Release Valves, and other Venting Valves in Liquid Piping Systems Air or any other gas is both friend and foe in a pressurized liquid piping system. On the first test, I lost about 3 or 4 pounds of pressure in 24 hours. The well tanks are designed for operation on water systems with. The well servicing the house has three outside water hydrants that are connected behind/after the water pressure tank - but 4 outside water hydrants are in front of the water hydrant (the water does not go thru the water pressure tank or filters). would i need to have a pump fitted as well. It is important to drain the tank completely before checking and setting the pressure in the tank. Reinstall all the lines and the tank. water tank is 100 foot high. Do not remove the valve core until pressure in the expansion tank has reached zero. relief valves relief valves nl submersible adapters & ftgs tank crosses - manifolds tank crosses - no lead tank crosses - stainless tank fitting pckg - manifold tank fitting pckg - no lead well caps - cast aluminum well caps - cast iron plastic well points - accessories well points - clayton mark well points - simmons well seals - abs well. As production continues, the pressure in the matrix area and around the well bore decreases, while the time that it takes for the pressure to build back up to initial formation pressure increases. Taps are provided to accept Pressure Switch, Pressure Gauge, Drain Valve, Relief Valve, Snifter valve, etc. Trust us for all of your Water Equipment TFP2-1. The air in the pressure tank provides the pressure for the entire system and makes it unnecessary to have an air compressor. On the lower side of the tank is the air valve which is connected to the compressed air chamber. Pressure tank air valve spits out water when I tried to check the pressure.



The tank and valve will be centered in the well casing. The pressure gauge on the HTV falls to zero. Frequent starts wear out well pumps, controllers and pressure switches much faster than longer runtimes. Every tank undergoes a seam-weld test, high pressure test and is subjected to our famous helium test. If I turn off the breaker to the well pump, will this effectively shut. Useful for planted tanks or where fish may interfere with float movement or where salt creep is a concern. It is caused by the hydrostatic pressure of the wellbore fluid and, sometimes, by any backpressure held at the surface, as when the well is shut in with blowout preventers. The Automatic Drain Valve, Model 70, with thousands used in water. Their job is to prevent water in the column above the pump and in the pressure tank from draining back into the well when the pump shuts off. Best used for indoors, a well pressure tank enables constant water flow for in home usage. Given the physical characteristics of water (incompressible), this condition causes the pressure to fluctuate rapidly and the well pump to go on and off too much. They are intended for low unseating pressure applications and will start to open at less than one foot of head to relieve groundwater pressure from the exterior of tank wall. I do not want to run a tank full sensor wire and instead would like to use back pressure in the piping to shutoff the pump. Composite Tank • Fleck Valve • Manual multiport Valve • Well mate Hydropnumatics FRP Tank Wellmate Membrane pressure tank polyester 1" male thread 8,5bar grey 60ltr type vertical. Today, Well-X-Trol Professional series tanks continue to deliver unparalleled performance and longevity, making them the most recognized brand on the market.



Reinstall all the lines and the tank. • Pressure tank • Torque arrestor • Well seal or pitless adaptor • 1" discharge piping HOTLINE 888. Amtrol™ is quite clear about the proper water pressure tank location: The Well-X-Trol should be installed as close as possible to the pressure switch. The pump then refills the pressure tank. Hello, I've lived in my home for about 4-5 years and have always wondered if the random cycling of my well pump could be do to me not having a check valve between the pump tank and the well/pump. With dozens of possible applications such as use in storage tanks, watering troughs, greenhouse watering and tank-fed gardening, as well as maintaining pond water levels - we have sold these to manufacturers and homeowners alike. What wrong with my Well Pressure Tank that is building up pressure and releasing water through Relief Valve? For a few weeks now, the pressure was building up very high and then water is pouring out of the relief valve for a few seconds Up until today, a bucket was enough to handle it. Replace defective valve) Slow leak in house plumbing. If you receive your water through a utility pipeline, your location and the age of the utility can impact water pressure. The well pump or well itself can also indicate possible problems especially if the water contains bubbles not accompanied by a resultant pressure loss or frequent pump cycling. On the first test, I lost about 3 or 4 pounds of pressure in 24 hours. Recommended. Re: pressure tank vs constant pressure dilemma Everyone has their beliefs. Remove a section of pipe long enough for the pressure-reducing valve and an isolation valve on either side of it. PRVs relieve pressure by opening at a set pressure to. Brady Check Valves are used to prevent backflow and loss of prime in water well, irrigation, and sprinkler systems.



The other common type of relief valve, and the one made by Hayward in PVC plastic, gradually diverts the flow out of the discharge port as the pressure is relieved. It should start up, pump to the high cut off then shut off like normal. So the valve at the tank is likely the original and someone added the one you’ve been using, either because it is easier to reach, or because they couldn’t get the original to close. Of course, the most efficient fix is to just replace the old style tank with a new captive air tank. Failure to do so could cause the tank to explode and result in DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. These main components all work together automatically to supply pressurized water to your point of use. Repair leak) TANK LOSES AIR. The return valve on the pump is shot and gravity is taking your water back. Next you will want to do a pressure check. Remove a section of pipe long enough for the pressure-reducing valve and an isolation valve on either side of it. Pressure Switch As air dissolves into the water, (controls well pump) Water Level Sensor the water level inside the tank rises Electrode and air pressure falls. In this system, water from the mains supply is fed to a header tank in the roof space by way of a. Should have a pressure gauge and valve on the tank or plumbing to re-pressurize the tank. When it hums, I see water running out of what appears to be a pressure release valve spigot. After taking a look at my well pump system I found that the pressure switch keeps turning the pump on and off every second or two. Open the hot water supply valve to fill the tank, purging air through the open hot water taps. Differences Between Degassing Valves, Air Release Valves, and other Venting Valves in Liquid Piping Systems Air or any other gas is both friend and foe in a pressurized liquid piping system. Safety valve: A safety relief valve is installed in the first tank the air compressor pumps air into. So when the volume of heated water exceeded tank capacity, it simply flowed back out to the city main or water well. With a bad valve (I've had one before) you will lose pressure whenever another source uses any water.



pressure inside the tank, which must be relieved to avoid the potentially negative effects of thermal expansion. Best Well Pressure Tank Reviews in 2019 for you. Pressure is a factor of the pump and the well. Here in the north, most pressure tanks are at some distance from the well. This should be 2-10 PSI below the "start" pressure of the pump: eg, if your pump comes on at 40psi (on at 40/off at 60 is the most common setup), the pressure tank pre-charge should be 30 to 38psi. There is a small rubber bleed back valve installed down the well casing, and the check valve is all the way up near the pressure tank. Pressure Relief Valve 1/2" (Set 100 PSI) # IRV50-100NL Pressure relief valve 1/2" heavy duty, no lead, bronze pressure relief valve for shallow, deep well and submersible pumps. The only use of a check valve is in the line from the pump so water cannot flow back to the well. Your well, water pump and pressure tank work together to get the water from the water table to your home. - Open nearest faucet to the tank and relieve all pressure in tank, then close the faucet; - Adjust the air pressure of the tank (by pumping or removing air at the snifter valve) 2 PSI below pressure switch “ON” setting; - Turn power back on to pump. Reverse Osmosis Water Accumulator Storage Tank Trouble Shooting: The air tank pressure must always be properly set for a Reverse Osmosis system to work properly. 2 out of 5 stars 53. usually installed beside the pressure tank. The lower number is the turn-on point for the tank to bring in more water, and the higher number shuts the pump off. Check tank pressure by placing a tire gauge on the air-charging valve on top of the tank.



The boiler expansion tank absorbs the expanding water by allowing the air in the expansion tank to compress, this prevents the pressure from building and allows the boiler to heat and cool without too mush pressure building up. The air is mixed with the water inside the aeration tank at right. the well is 213 feet deep. When a new well is put on line or begins to produce oil, the pressure around the well bore is equal to the pressure throughout the reservoir. If your pressure tank is undersized this can cause rapid cycling depending on the demand placed on the well system. I'm not entirely clear on the procedure, but I believe you drain the tank and then use a compressor with an air chuck to reinflate the bladder to the factory spec (there's probably a tire valve on the tank somewhere). Whether you need a complete well water setup, or you just need to replace a part in your existing well water system, we have what you need. i was told to just install a tire valve stem insert into. type of 'filter' can be used but not those with sizing/rating mesh screens that can block. Also if the relief valve has not been activated regularly, it might leak when you first activate it. It is a tank (built like a septic tank) that contains one or more effluent or sewage pumps, controls, etc. This will greatly increase the life of a bladder in a tank, as well as increase the life of the pump itself. Drain the tank by opening the closest faucet. Different pressure switches have different unloader valve configurations. You have to empty the tank of water in order to check the air pressure. Leave the drain valve open and see if air pressure drops over a period of time. Typically pressure switches are mounted to “Tank Tees” which connect directly to the pressure tank. Waterworker well pressure tanks are made by the same company, are cheaper and might well be just as good.



Tank pressure can be easily regulated. Check out the most popular well pressure tanks here. If the control pressure switch fails to close at the lowered tank pressure, adjust it per Section 2. H ow to Adjust Well Pressure Tanks Adjusting Pressures General Tank pressures are controlled by an electrical pressure switch which opens and closes the pump electrical circuit at various pressures registered at the diaphragm of the switch. Turn off the power to the well pump. After enough pressure is lost, the switch activates the pump again. - Quantity 6. If water comes out the valve, the tank has a ruptured bladder and needs to be replaced. I'll let you know what happens after the new valve is put in place. Well-x-trol and Flex-Lite Pressure Tanks. Precharged pressure (bladder) tank A key component of many well pump systems. The RO tank has a bladder inside, and this bladder separates air from water. TANK TEE (Section O) Connects water line from pump to pressure tank and service line from tank to house. When the pumping system turns off this is your cut off pressure. The Challenger water well pressure tank combines high performance and designer appeal with reliability and durability. In order to re-pressurize your system properly you must know the cut in and cut out pressure settings.



Pressure tanks work by storing pressurized water, making it available to your home or irrigation system. When the pressure inside your hot water tank builds up to the danger level the pressure relief valve releases the pressure. There is no reason for a shut off valve either. GrohFlex Pressure Balance Shower Faucet with Valve By Grohe Check price for GrohFlex Pressure Balance Shower Faucet with Valve By Grohe get it to day. The inside of the pressure tank contains a rubber bladder device which measures the pressure inside the tank at all times. Replace defective valve) Slow leak in house plumbing. 25" WellMate Tank Fitting Package With Relief Valve and a full selection of Water Equipment. Verify 100% if you do OR don't have a leak in your pressure tank bladder. Static Pressure The word static means stationary or no movement. Since developing the first pneumatic valve core over 150 years ago, Schrader has been at the forefront of innovation in our industry. Check the pressure in the tank using a tire pressure gauge (there is a valve on the top). The non-closing seat is sized to allow flow of approximately 1 gpm on this valve. Pump Up switches are used to fill your water storage tank from your well and are normally closed. The valve and seat are designed to never be able to completely seal. It appears to be from the area of the pressure guage. relief valves relief valves nl submersible adapters & ftgs tank crosses - manifolds tank crosses - no lead tank crosses - stainless tank fitting pckg - manifold tank fitting pckg - no lead well caps - cast aluminum well caps - cast iron plastic well points - accessories well points - clayton mark well points - simmons well seals - abs well. Failure to do so could cause the tank to explode and result in DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. This will greatly increase the life of a bladder in a tank, as well as increase the life of the pump itself.



Pressure tank reads 10-12 psi and won't take more from hand pump (tiring, by the way) or electric compressor. Re: Increase water pressure on well? You may need to recharge the bladder in your tank, and it's probably designed to top out at 60PSI. Install the pressure relief valve in the other female threaded opening on the front of the cross bar of the tank. This is safety feature that is built into every tank. How Home Well Water Pump and Pressure Systems Work Knowing the basics of how your well water system functions is important when selecting a water treatment system because if the wrong type of treatment system is used, it can adversely affect the water pressure and flow rate inside the home. If your water heater is gas powered, relight your water heater’s pilots switch. Pressurized Well Tank is pre-charged and designed to maintain its air charge for years to provide easy upkeep. Offering fiberglass composite pressure tank suitable for chlorination in your well and more - all sizes from 22 to 119 gallons holding capacity. Possible bad news: If you have less than 25 PSI you just don’t have enough pressure for a standard automatic irrigation system to work well (the automatic valves need a higher pressure to work). But tanks are like automobile tires: you have to put air in them as part of normal maintenance. Frequent starts wear out well pumps, controllers and pressure switches much faster than longer runtimes. • Must be installed so as to allow complete drainage of both the pressure relief valve, and the discharge pipe. Your laundry room and other areas will be protected as well. Non-bladder pressure tanks require more frequent maintenance and replacement with a bladder type pressure tank should be considered. If the filter doesn’t have enough water, flow & pressure to backwash, the. (I) Pressure Switch – Based upon the pressure being sensed, this switch turns on/off the well pump. The valve is supposed to maintain constant pressure from the main to all faucets, but when it goes bad you may find yourself standing in a trickle of water in the middle of your shower. These water wells use a powerful pump that requires a pressure tank to operate it, as there is a loss of compressed air beneath the ground.



The return valve on the pump is shot and gravity is taking your water back. The well pump will continue to run until the pressure reaches ~50 PSI. When the pumping system turns on this is your cut in pressure. Protects well tank systems from pressure buildup; 1/2 in. Steel plate bracket, 4 rubber mounts, air stem extender, tank mounting clamps with bolts and nuts. Mityvac offers kits for simple, clean and quick one-person brake bleeding, as well as more extensive kits for testing and diagnosing hundreds of automotive related functions. Usually, he said, it's a loss of pressure in the air bladder that leads to the pump rapidly turning on and off. Typically pressure switches are mounted to "Tank Tees" which connect directly to the pressure tank. 4 High-pressure rated components and control valves that can withstand liquid pressure under the same operating conditions as the vessel sampled. Hello, I've lived in my home for about 4-5 years and have always wondered if the random cycling of my well pump could be do to me not having a check valve between the pump tank and the well/pump. Air does not compress as easily as propane. Preventing pressure equilibrium is critical as the system will want to equalise fluid and pressure levels immediately (and would most certainly do so were it not for the pulsed power air compressor, the air gap in tank A, and the pressure relief valve at the top of tank A). Troubleshooting Guide - Check the bladder pressure tank air charge Disconnect electrical power to the pump. Shop Menards where you will find all the pump and well tank accessories Well Pump Pressure Switches (30) Click to add item "Water Source 3/4" Brass Foot Valve. The tank supplies water to meet demand; then as the tank empties, the pump activates, refills the tank and the cycle is repeated. This valve is much like a tire valve. The F93H has a minimum pressure re lease valve to avoid lowering tank pressure below 25 psig (172 kPa). Connects water line from pump to pressure tank and service line from tank to house.



Troubleshooting Guide - Check the bladder pressure tank air charge Disconnect electrical power to the pump. If water comes out the valve, the tank has a ruptured bladder and needs to be replaced. Solder the valves into the line and adjust the pressure. For commercial jobs, we also offer ASME Code Replaceable Bladder Pressure Tanks ranging from 2 to 1,320 Gallons. 124 Series Float Control Valve stilling well supply fire water storage tank Level Control Valve Application 210 Series Altitude Control Valves Fire Water distribution from source sensing line Altitude Valve Application Isolation Valves Reserve Fire Water Storage Tank Control Piping (Not Furnished) Float Control 129 Series Float Control Valve. The Pressure / Vacuum Relief valves are available in a number of combinations illustrated below. Pressure Relief Valve 1/2" (Set 100 PSI) # IRV50-100NL Pressure relief valve 1/2" heavy duty, no lead, bronze pressure relief valve for shallow, deep well and submersible pumps. Prior to connecting this tank to the hydronic system the pre-charge pres-sure within the tank should be confirmed and if necessary adjusted to equal the minimum system pressure at the tank location. On the lower side of the tank is the air valve which is connected to the compressed air chamber. Probably is "water logged" meaning the air is leaking from the tank. 150 PSIG Working Pressure WELL-X-TROL ® Diaphragm Well Tanks: WX-100, 200 and 300 Series with DuraBase® Construction Shell High Strength Steel Diaphragm Heavy Duty Butyl Liner Antimicrobial System Connection Stainless Steel Finish Tuf-Kote™ HG Blue Water Circulator Turbulator™ Air Valve Projection Welded Factory Precharge 38 PSIG (2. It's often found in older homes and is not as popular today as other types of pressure tanks. Taps are provided to accept Pressure Switch, Pressure Gauge, Drain Valve, Relief Valve, Snifter Valve, etc. I did the soapy water test and found only one leak. The volume of water stored in your pressure tanks becomes less as the pressure is raised - a captive air tank swinging from 40 to 20 PSI stores far more water than one swinging from 80 to 60 PSI. If it was the foot valve it would have to prime up every time it cut on. In our area, they PRV or Pressure Relief Valve is typically located just inside the area where the water enters the house, and there is usually one hose bibb that is plumbed before the PRV to allow for the higher pressure needed for a sprinkler system installation. Well Pressure Tank Valve.