Return jet leak

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Joroco
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Return jet leak

Postby Joroco » Tue 12 Mar, 2019 22:33

Hi,

I have a leak in my concrete pool. I turned off pump and water level dropped 4" in 3 days until below return jets. Problem is I have 8 return jets so not sure which one(s) is leaking.

I live in Philippines so I'm sure pool construction is substandard. I have attached a pic of one of the return jets....was this installed properly? A "professional" pool company came in and sealed all the jets and performed a pressure test and said everything is fine yet pool continues to,leak.

Any idea how water could be leaking out through return jets?

Thanks
Attachments
IMG_5241.jpg


TheChieftain
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Re: Return jet leak

Postby TheChieftain » Wed 13 Mar, 2019 21:44

Hi,

Is your pool concrete (Gunite), vinyl, or fiberglass? Looks like vinyl to me.

Is it an inground pool or above ground?

Do you have a spa that’s higher than the pool?

In the picture it kinda looks like the vinyl is separated from the wall fitting.
Joroco
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My Pool: Inground pool, 12m (l) x 3.5m (w) x 1.5m (D), sand filter, tiled surface

Re: Return jet leak

Postby Joroco » Thu 14 Mar, 2019 07:16

Inground Concrete pool with tiles. No spa above the pool.
Teapot
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Re: Return jet leak

Postby Teapot » Thu 14 Mar, 2019 08:09

Accepting the pipes do not leak (from the pressure test) what height is the equipment pad in relation to the water line?
Joroco
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My Pool: Inground pool, 12m (l) x 3.5m (w) x 1.5m (D), sand filter, tiled surface

Re: Return jet leak

Postby Joroco » Thu 14 Mar, 2019 20:02

The pad the pool pump sits on is 4' below return jets. What keeps the water from exiting pool through return jets when pool is off, pressure?
Denniswiseman
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Re: Return jet leak

Postby Denniswiseman » Fri 15 Mar, 2019 04:31

The fact that there are no leaks around the pad means that the system is closed so wouldn't leak but would always be under positive pressure
I would suspect a fault with the spider gasket in your multiport valve allowing the pool water to run to waste
Is the waste connection plumbed in so that you can't see the leak
Joroco
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My Pool: Inground pool, 12m (l) x 3.5m (w) x 1.5m (D), sand filter, tiled surface

Re: Return jet leak

Postby Joroco » Fri 15 Mar, 2019 06:30

Actually the pump was leaking. I took pump apart thinking there was a gasket but there was only 4 screws which I wrapped with Teflon tape and tightened back up. So if pump was leaking then the pressure would be affected and water would drain out through the return jets? I have attached pics of pump that I took apart...thanks for your help..,hard to find anyone in philippines that knows what they are talking about.
IMG_5258.jpg
IMG_5257.jpg
IMG_5245.jpg
Denniswiseman
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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: Return jet leak

Postby Denniswiseman » Fri 15 Mar, 2019 07:46

Joroco wrote:Actually the pump was leaking. I took pump apart thinking there was a gasket but there was only 4 screws which I wrapped with Teflon tape and tightened back up. So if pump was leaking then the pressure would be affected and water would drain out through the return jets? I have attached pics of pump that I took apart...thanks for your help..,hard to find anyone in philippines that knows what they are talking about.
IMG_5258.jpg
IMG_5257.jpg
IMG_5245.jpg

It's very unlikely that the screws were the source of the leak as all they do are hold the parts together
If you don't have a gasket or "O" ring, clean up the mating surfaces and smear silicone lightly over them. Re assemble and leave overnight for the silcone to set before running it again
Teapot
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Re: Return jet leak

Postby Teapot » Fri 15 Mar, 2019 12:05

Joroco wrote:The pad the pool pump sits on is 4' below return jets. What keeps the water from exiting pool through return jets when pool is off, pressure?

Which was obviously where I was heading, glad you found the leak. The bolts, as Dennis said wouldn't normally be a leak point unless they were loose, often they are blind holes to prevent leaks. From your first pump photo it looks like there is a large O ring (around 120mm dia) which should be silicon greased or some sealant as suggested.

It is still possible to get a leak in this situation as it could be via siphon effect, switching off the pump starts the siphon from the spider gasket leak.
Anyway good you sorted it.

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