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Answered 2013-11-12 00:49:54

It is used to allow rising ground water into the bottom of a pool to stop boyancy , which could potentially lift the entire pool like a boat.

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the hydrostatic valve is only to equalize pressure of ground water to that of the pool the only time it does anything is when the water table becomes higher in the ground water than in the swimming pool . it doesn't connect to anything. it is simply to keep the pool shell from floating out of the ground


The Hydrostatic valve is usually on the lowest part of the pools floor. The hydrostatic valve is there to protect the pool from being lifted by ground water in the event that it is empty. it allows the ground water under the pool to get into the pool thereby stopping it from floating out of the ground on top of the ground water.


Any pool can have a hydrostatic valve and nothing has been made that cannot be broken eventually.


A Hydrostatic valve is basically a plug that stop water coming down out of the pool, but when the water pressure under the pool gets higher then the pressure in the pool it will let water into the pool from underneath in order to stop the pool from floating in ground water.


I'm not sure if it can be installed after a pool has been installed, try contacting a company who makes these hydrostatic valves and see if it can be done. good luck.


A "relief valve" can only be accessed when the pool is empty, and no swimming pool should ever be left empty. The only exception is when absolutely necessary due to repair or resurfacing, and that should be completed within the shortest possible time. Any pool that is empty, and that has a relief valve, should have the valve removed for the entire time, regardless of the weather forecast. A "hydrostatic" relief valve opens and closes when needed as it attempts to equalize the pool water pressure with the ground water pressure. Human intervention is not involved because the pool is still filled. Hydrostatic valves are great in theory, but seldom work after a few years.


once you had to empty your swimming pool it might turn into a fu***ing boat ing boat out of it


If the ground on the outside of the pool is is reasonably wet you may find that water will seep into the pool where it leaks. Be careful with an empty pool ground water can make them float up and out of position if you do not have a hydrostatic valve in the bottom.


You can but be careful that there is not a great deal of ground water around the outside of the pool if you have one make sure the hydrostatic valve at the bottom of the pool will allow water from below the pool to enter the pool as it is supposed too. if there is a great deal of ground water the danger is that your pool will float out of the ground.


If you don't have a hydrostatic valve on the bottom I would suggest at least a third. otherwise it may start floating in ground water if it is present.


A hydrostatic relief valve prevents your swimming pool from wanting to become a 'boat'. If the bottom of the pool is below the level of ground-water, and the pool is emptied, the pool would want to float in the underground water. I have actually seen the deep end of a 40ft gunite pool (with no hydrostatic valve) rise out of the ground (by 18") when the pool was emptied for repairs. A hydrosatic valve would have opened (and allowed the underground water to flow into the pool) when the water pressure beneath the pool became greater than the water pressure in the pool. I am not sure if you can manually test the valve, so check with the supplier/pool builder. A hydrostatic relief valve is located in the deepest part of your pool. It may be under the maindrain cover or in its own little box on the bottom of the pool. The purpose of the hydrostatic relief valve is to relieve a build up of pressure if it occurs from underneath the pool. If the water were to be removed with a high water table then the pool may float up out of the graound like a barge. You then have a big problem on your hands. The fhydrostatic relief valve will open allowing the ground water to enter the pool to keep the equalibrium and to relieve built up pressure from underneath the pool. The valve typically does not need any maintenance. However, if the vavle has opened then there is a chance that a tiny particle could get stuck in the seal when the valve closes again. The tiniest particle (which may not even be seen) could allow water to seep out of the pool into the ground. There's a lot of water in the pool and each gallon of water weighs 8.33 pound. A typical residential pool of 20,000 gallons holds water weighing about 166,600 pounds. A commercial pool of approximately 120,000 gallons has water weighing approx. 1 million pounds. Removal of this much weight obviously changes a lot of things. You need to be very careful removing water from a pool. Things to be concerned about are high water table, underground springs, rainy weather, hills behind the pool. Please write if there are any other questions. Steve Dunn Certified Pool Instructor Consultant & equipment distributor Commercial Pool Systems, Inc. FURTHER ANSWER When you find your pool losing water and don't see any obvious place, it may be the hydrostatic valve has lifted and then not seated properly. The valve needs to be flushed by being lifted momentarily. I have done this by donning a mask and with fins and weights swum down, removed the grate, and lifted the valve by hand. If you have never seen such a valve find one in a swimming pool store and see how it works. Also, be sure there is not a lot of trash in the fixture near the valve or again it may not seat. Best to do this with the pump off if the valve is in the drain box or you may get caught by the suction. This can lead to serious death! Paul Delage


The purpose of a swimming pool heat pump is to rise the temperature of the water. The pool then can be used for swimming even on days when the weather is not perfect. The swimming pool season is extended.


There is no filter at the bottom of a pool. Perhaps you are looking at the hydrostatic valve which is there in case your pool is emptied and Will make sure that the pool wont float in ground water.


you have to replace it.not repair it.


Yes just be careful that the hydrostatic valve works in case of ground water causing the pool to start floating.


I would NOT recommend leaving the pool drained all winter. If water froze in your hydrostatic relief pipes it could be the same as leaving them plugged. Further, moisture in the ground under the pool shell could freeze, expand, and "heave" the pool.


You are probably better of destroying the valve to allow ground water to pass both ways If you fill in a pool you end up with an area of soil that cant drain so you may end up with a boggy area where the pool used to be by removing the valve and having a hole there you would at least get some drainage into the natural surrounding ground. A couple of holes in the bottom of the pool would not do any harm at all.


I don't know about your pool I do know however that most pool don't have a way out for the water other then through the static skimmer. and people often mistake the hydrostatic valve at the bottom of the pool as the pool drain


This is the hydrostatic valve. If the pool is emptied it is removed to relieve water pressure caused by the surrounding water table If not removed a pool can float out of the ground.


Kinda-sorta, but not really. Yes, parts of it were filmed in a pool, but not a swimming pool as such, but a studio pool. A pool built specially for the purpose of filming water scenes for Movies and TV in it.


Put a gravel pit at the bottom with a means of pumping it empty. Make sure you fit a hydrostatic valve to the pool.


You can not measure the pressure in a swimming pool. If you mean the pressure on the filter tank gage then you may have to backwash the filter. Talk to your local pool store for instructions as how to maintain a swimming pool and the equipment. Get some education on swimming pool maint. before you get into some real trouble. A pool is not too forgiving for someone without a basic knowledge of pools.


a swimming pool a swimming pool


Perhaps it is not a drain but a hydrostatic valve. These are fitted at the bottoms of pools to let ground water that has built up under an empty pool into the pool in order to stop it from floating out of the ground.


Hire a submersible pump from a tool hire place. Be care full that that your hydrostatic valve at the bottom of the pool works properly because if there is a lot of ground water outside your pool it is in danger of floating up out of position wrecking the pool.