Hey everyone,
My money-pit is an in-ground concrete saltwater pool with a sand filter. Other than that I don't know much about it. It came with the house we bought. Since we've had the pool, there have been leaks in the plumbing caused by roots and digging mishaps.
Recently I noticed that while the pump was running, a steady tickle of drops was coming from the waste line. I have also noticed that the filter basket is emptying while the pump isn't running, and when started, air comes out first.
These three things lead me to believe that there is a leak in the valve system on the sand filter. Am I right in this assessment? Could it be something else?
Thank you for your thoughts.
Gaz
Plumbing losing pressure/Filter draining
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- Pool Industry Leader
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Re: Plumbing losing pressure/Filter draining
Trickle of water from the waste line would suggest a failure of the spider gasket in the multiport valve. Depending on the height of the equipment pad in relation to the pool could also allow an air leak to cause the other issue. People often forget about replacing O rings in valves and connecting unions causing issues.
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- Joined: Sat 13 Feb, 2021 00:49
- My Pool: I have a 50,000 litre in-ground concrete pool with a sand filter.
Re: Plumbing losing pressure/Filter draining
Thank you for the helpful response!
I did something different last night. Instead of just walking away from the pump after turning it off, I stayed put and watched and listened. Soon, air bubbles started coming up into the pump's filter. And I could hear water moving (more like a very gentle hissing sound) inside the body of the sand filter. Does this provide any more info?
I did something different last night. Instead of just walking away from the pump after turning it off, I stayed put and watched and listened. Soon, air bubbles started coming up into the pump's filter. And I could hear water moving (more like a very gentle hissing sound) inside the body of the sand filter. Does this provide any more info?
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- Pool Industry Leader
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- Location: United Kingdom
Re: Plumbing losing pressure/Filter draining
If water is coming out air can get in and allows the water to drain back into the pool, do as Teapot says and change your spider gasket in the MPV
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- I'm new here
- Posts: 3
- Joined: Sat 13 Feb, 2021 00:49
- My Pool: I have a 50,000 litre in-ground concrete pool with a sand filter.
Re: Plumbing losing pressure/Filter draining
Thank you, guys!
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- Pool Industry Leader
- Posts: 2592
- Joined: Tue 06 Sep, 2011 05:48
- My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
- Location: United Kingdom
Re: Plumbing losing pressure/Filter draining
GazzaS wrote:Thank you for the helpful response!
I did something different last night. Instead of just walking away from the pump after turning it off, I stayed put and watched and listened. Soon, air bubbles started coming up into the pump's filter. And I could hear water moving (more like a very gentle hissing sound) inside the body of the sand filter. Does this provide any more info?
If you are getting air into the pump then you have a suction side air leak
Check your pump pre-filter lid "O" ring and lubricate with silicon grease, then check your suction side union seal, then check your pump drain offs
If all these fail then you have a problem with your suction pipework
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