Let me ask you this......couldn't the liner installer pop out the liner above the return jet, and then turn on the pump to see if water is going behind the liner rather than back into the pool? I will attach some pictures.

Isolated which area was the problem, selected only skimmer suction, and capped the bottom drain. With the filter pump ON, the plumbing on the suction side is utilizing a vacuum action.

I was losing an inch in 2 days and losing positive suction at the pump , which caused air to get in the system. A leak detection company will charge around $300 to find the leak .Hello.

The people that installed my liner said that it must be an issue with the plumbing to the pool. the liner installer is saying that there may be a suction side leak from the skimmer to the pump (It's about 7 feet or so). If the pool seems to leak only when the equipment is turned off, you may have a leak in the suction-side plumbing. While the pump is on, the vacuum created can cause air to be sucked into leaks, preventing you from seeing them. Dog hair can clog a system pretty quickly if you do not keep an eye on your baskets. However, it does mean you have a pressure side leak and not a suction- side leak.Generally, if you’re losing water when your pump is running, you have a pressure-side return leak. JavaScript is disabled. Forums One inch of your pool water can equal 500 gallons. Check the end of the backwash hose for any water running when it shouldn’t be.Internal leaks may also occur in a defective filter multiport valve. With the filter pump on, the plumbing on the pressure side (after the pump) is under pressure. I did watch the videos, and I think we agree on the problem however the terminology is getting mixed-up a bit. Another culprit inside the valve is your spider gasket. The capacitor is what starts the pump by giving it a jolt of electricity. Good luck!Hi. It seems like a quick determination for the issue at hand, doesn't it? Though, what you don’t know is why your pool is only losing water when the pump is running.Whether it is from evaporation or spillovers, every swimming pool loses water. A few days go by and you notice the water level is low again. If it were a suction side leak from the skimmer line to the pump, wouldn't the pump not prime, or not be able to hold a prime? :grrrr: Thoughts?My Pool Is Only Losing Water When My Pump Is Running The pool was fine last year when I shut it down (no leaks when the pump was running).

If you don’t mind cleaning up, then it shouldn’t be a problem.water is draining into the pool from the spa why is that?The check valve that prevents the water from flowing back to the lower level of water in the pool, is leaking.You can help isolate a return line leak by using the shutoff valves. Good Luck!Is it really that bad that my German Shepherd swims whenever she wants in our swimming pool? :grrrr: Does the hair make the pump work harder?When your pup swims, all the shed hair will end up in your skimmer or pump basket, maybe even your filter. Sounds like you need to do some PVC pipe work and maybe some return port replacements. So you're losing water only when the pump is on, so that would indicate a pressure side leak (from the filter to the return jets). If you cannot find any leaks, then you may need to do a pressure test. March 22, 2017 sdcpm. It's been a work in progress, first my heater was leaking and they won't cover it because they said chemicals were off( previous owners fault) Now I removed it and lose water while pump is on.

Very frustrating. I have an in ground pool with a sand filter. Leak when Filter is Running. Once some people get your money, they don't want to hear from you again.

If it was from the suction side (pool skimmer to the pump, you would have air getting sucked-in while running, and/or lose water when the system was turned-off. That is a pet peeve of mine. if it is leaking from one pipes going to the ports, you should be able to isolate which one. Post by bcfrank38 » Fri 29 May, 2009 16:10 . That size pool should have at least 4 inlets and a selector valve for each set. In many instances, the coupling, unions, or hose is under large amounts of pressure and will spring a leak. Our pool is losing water ONLY when the pump is running and connected to the return line. Understanding Why Your Pool Leaks When The Pump Is Running. Air is often drawn in through leaking voids which keeps the pool … Normal wear and tear, overtightening, and physical damage to unions can contribute to water leaks.For above-ground pools, don’t forget to inspect the pump to filter hoses. We do not have the plugs in. Damaged or compromised spider gaskets can certainly cause a water leak.We also recommend walking around the perimeter of your pool to check for wet spots or small puddles of water. It’s awesome. The water returning to the pump (poolside skimmer to pump) is your suction side.