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Does the pool main drain-hydrostatic valve need to be connected to the skimmer box?


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Answered 2010-01-05 17:41:48

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

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I think you are referring to a Jandy valve. The valve diverts water from the main drain to the skimmers. When vacuuming, turn the valve so it is pointing to the skimmer inlet pipe. OR It could also be called a diverter valve located at the bottom of the skimmer depending on the age of the skimmer. k


No. You cannot use the main drain to lower the water level below the skimmer. This is because the main drain is not really a drain. It only connects right back to the 3 port valve in the skimmer.


Unless the pool has a dedicated main drain line and a positive seal valve it is best to use a submersible pump. Most newer pools have the main drain line connected to the skimmer and there is a diverter valve in the bottom of the skimmer that regulates the ratio of main drain vs. skimmer suction. Once the water level drops below the skimmer throat the suction is usually lost. Check with your local codes and laws as some areas require draining into a sewer cleanout and other areas allow draining into the storm drain system as long as the chlorine has been allowed to dissipate and the pH is between 7 and 8.


How do you know that the main drain is plugged? When was the last time that you back washed or cleaned the filter? If there is no flow at the main drain - check to see if a valve has been closed or adjust the variflow valve in the skimmer - located at the bottom of the skimmer- if you have that type of skimmer. Also check the pump basket - it may be full of debris.k


The drain - called main drain- is or should be connected with the skimmer plumbing and that goes to the pump. You should not have to clean the main drain unless you have a massive amount of debris. Main drains are routinely cleared using a CO2 tank and either a plug adapter or an inflatable canvas bag thingy the name of which escapes me at the moment. Place it in the front port of the skimmer if that is how it is plumbed and open the tank valve full blast. You will either clear the drain or the plug/canvas thingy will come shooting out of the skimmer so don't stick your face over it when opening the valve. If the pool has a separate main drain there will be at least 1 three port valve in front of the pump pot. With the valve pointed in the right direction put the CO2 tank hose with plug or canvas thingy into the suction line and let er rip.


Well, if you mean to drain the pool --- it is not a drain as in house plumbing -- the sink -- the tub. It is connected to the skimmer and that is connected to the pump. Your main drain is most likely 'working'. It does not nave to be a strong flow. Well, if you mean to drain the pool --- it is not a drain as in house plumbing -- the sink -- the tub. IT DOES NOT DRAIN ANYTHING. It is connected to the skimmer and that is connected to the pump. Your main drain is most likely 'working'. It does not nave to be a strong flow.


On the pool I take care of, before the pump (suction side) there is a large 3 position valve. To the left is bottom drain, middle is all 3 and to the right is the 2 skimmer baskets. You will have to check to see which one controls which on your pool but is simple to check, turn all the way one way and stick your hand into one of the skimmer baskets and feel for suction.Answ:: Most newer pools have a "valve assy." of sorts at the bottom of the skimmer. It is either made of plastic or brass. This rotates in one direction to either increase or decrease the suction at the skimmer. It really does not totally shut off the main drain.Other type skimmers have a system that uses a "float valve" at the bottom of the skimmer. Removing this unit from the skimmer will reveal two holes at the bottom of the skimmer. Looking down into the skimmer from the deck side of the pool ~ the hole closest to you would be the direct link to the pump. This is the port in which you would connect the vac hose. The other one is connected to the main drain and all go back to the pump from the bottom of the skimmer. The "float's" purpose is to prevent the skimmer from sucking air in the event the water level got too low. It has a floating stopper inside.If your set up has only one port at the bottom of the skimmer then you most likely have a brass or PVC valve situated just before the pump inlet. Sometimes there are multiple valves and are usually not marked as to what they control. You just have to work with a partner to find out which one does what and where.k


If you look at the pipe that is going into the filter pump you will notice that it has a tee that is peceeded by two or three pipes comming up from the ground. Those will be from the skimmer, main drain, and if you have one from the cleaner. If you observe the flow of water in the skimmer then change the valve so there is no more water flowing that will be the one going to the main drain or cleaner. Repeat the process to eliminate which one is the cleaner. Which ever one is left is the main drain.


Attach the hose to the side skimmer basket with a special plastic adaptor that fits in your size skimmer. Types of skimmers: Brands: Purex, Anthony, American Products, Pentair, Hayward are major names. Hum, not inside the skimmer basket but under it. There you will find either a disc type object much like a flying saucer. Then under that there will be 2 holes. The one, if you are looking down into the skimmer from the deck side of the pool, to back side of the skimmer - 0 0 < that one - closest to you is the suction part of the skimmer. Your hose is pushed into this hole after filling the hose with water. The "adapter" is another type skimmer as stated above that you can rotate to the left or right to achieve optimum skimmer suction. With a single hole skimmer - that hole is the suction for the vac. You just have to plug the second skimmer if you have one. Still, there is another with a hole in the side wall of the skimmer near the bottom of the skimmer. This is also the vac hole. With it you plug yoyr vac into it and then close a valve that controls the main drain. You have to remember when you are finished vacing pool you then open the main drain valve. The latter one is a quite old system made by or used by Anthony Pools. k


If its not connected through the skimmer I imagine it's there to empty it. hmmm, on the above. The main drain in pools is for circulating the lower part of the pool and is not intended to drain the pool as in a bath tub.


That piece of plumbing may have some blockage in it or there may be a restriction of some sort on that line. There may also be a leak in that side of the plumbing. Is there any air coming back to the pool when in this position? If so that is the cause. Fix the suction leak and try again. The 3 way may not be positioning completely over that port. Or it could be that the three way valve does not have the 3rd port open. If the 3 way is prior to the pump, then one port goes to the bottom of the skimmer, the other goes to one of the main drain ports. When your skimmer has reduced "suction" (not pressure) it is then the 3 way may be drawing from both skimmer and main drain at the same time. You only have "pressure" after the pump and at the filter. Before the pump then it is considered suction. Or the 3 way may be plumbed or labeled wrong. Also, in another instance, with the valve in the skimmer position - it could be drawing from more than one skimmer. I suspect the latter answer.


Yes and no. One hole, the one to the rear of the skimmer goes directly to the pump. This also acts as your vacuum hose port for vacuuming the pool. The other comes up from the main drain. Covering both of those ports should be a float valve type of an assembly. One of the purposes of the float valve is that when and if the water level gets too low in the pool then the float in the valve assy. seats and will then let water flow in to the pump directly from the main drain. Hope this is satisfactory. Ken


When adding stabilizer to a pool you should not have a backwash valve open. Stabilizer should be added directly into the skimmer basket and you should open the skimmer all the way and close off the main drains for 24 hours.


1st to see if it a leak ...close the skimmer valve...do you get alot more air bubbles in the punk basket?/if yes.thiers a leak in the main drain linethen do the same thing for your skimmer(make sure you have enought wayer in the pool.thanks


Unless you have multiple hand cranked valves at the equipment pad you can't. Some pools systems have a valve of sorts in the bottom of the skimmer that will reduce the flow but may not entirely shut it off. Why the need to shut the main drain? Ken


Depends how the pool was plummed. If you have a dedicated main drain line, or you share a main drain line and a skimmer line. Both are suction lines to the pump,meaning they will go into the front of the pump. If you have several valves on the front of the pump, and hopefully they are labeled you could try to shut all of them except the main drain and use what is called a drain king. It hooks to a waterhose and swells inside the pipe forcing water in the opposite direction. If you dont have any valves on the front of the pump ,chances are you share suction with the skimmer. check the inside bottom of the skimmer. Main drain may be plummed to skimmer bottom.



You run the pool filter through the main drain by moving your valve next to your pool pump to main drain only. This is usually a Jandy Value or the like. Usually there are three positions on this value. One for both main drain and skimmers. One for skimmers only and one for main drain only. As a precautionary warning. Only adjust this value with the Pump OFF. Doing it while the pump is running may cause significant damage to the value. No one needs additional pool repairs if it can be avoided. Hope this helps. : ) The above answer is only good if there is a dedicated main drain line to the pump. Most pools in California have the main drain line connected to the front port of the skimmer and use a diverter valve in the bottom to regulate the ratio of bottom or skimmer suction. Jandy and Ortega valves are both designed to be adjusted with the pump running with no fear of damage. Multiport valves should only be adjusted with the pump off.


Water not on at street 'city' valve, or other valves--after inside main valve--off.


The main drain is positioned at the lowest point of the pool. The main drain has a perforated pipe in its base which is set in gravel in a pit at the deepest part of a pool. a pipe connects the side of the main drain to the skimmer box.That has got to be one of the worst answers I have ever seen in this forum. Not only would there be no suction but the pool would leak like a sieve. Try taking a straw and drilling a bunch of holes in it and then try drinking through it. Main drains are connected to the pump either with a dedicated solid pipe or into the front port of a skimmer. It is controlled by a 3 port valve if dedicated or a diverter valve in the bottom of the skimmer if that type is used.First answer, in bold type got "main drain" confused with a "sump line" as is sometimes used in areas where groundwater seeps into swimming pool hole under the liner. In such cases, a sump line is sometimes installed as described in the bold answer and connected to the pool filter pump so if water collects under liner causing liner to float away from pool bottom, sump line can be used to move water under liner to either into the pool liner, or out the waste line and away from the pool. But in such case, the sump line would never connect to skimmer and would instead connect near filter pump inlet with a dedicated valve bank to control water flow from pool or sump line since you wouldn't want to drain the pool while draining water from underneath the pool liner, and you wouldn't want pool water getting under the liner when filter system is turned off either.


A trade qualified plumber could give you a quick, accurate, honest answer


It's a valve that regulates the main water pipe.


This happens when the Jandy-valve is set to pull too much suction from the skimmer. The pump will also sound like it's choking because it's not getting enough water from just the vacuum. Try turning the valve to pull a little suction from the main drain as well.


It should not have water in it, especially if freezing weather is expected. Drain the pool to below skimmer line and drain the filter and filtration equipment.


The valve seat or washer on the main valve are not seating/sealing properly.