Spa help with plumbing

dlfjr1

0
Jul 2, 2018
9
Gasport/NY
I have an overflow spa and it works fine. The only issue is that when I shut my filter off, the water level drains to about the pool level. My system is set up so that it has 4 intakes into a manifold (spa drain, skimmer, vacuum, and main drain) and four outputs from a manifold (spa Jets, stair jets, pool return and water feature. All the plumbing after the pump and after the filter are new. The manifolds are original and so is the pump (installed 2003). The valves have a ball inside to shut off water by turning. Could the spa drain one have a crack in it allowing water to go through thus going back into the pool?
 
Here they are.
 

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Yes, last year my pool heater died and my pool guy diverted piping back to pool. It used to have picture 1 on the return pipe from the heater where the arrow is in picture 2. Could this be the problem? It used to keep water.
 

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D,

That check valve has nothing to do with the spa.. It just prevent the tablets in your tab feeder from leaking back and eating the guts out of your heater..

Your pool does not have the normal Return and Intake valves that allow you to switch between the pool and spa mode like most systems.. It appears to me that the only way to hold water in your spa, when the pump is off, is to manually close any ball valve connecting to your spa.

At a minimum, the spa jet return line would need to have a check valve..

What does the valve on the far left control???

Unless you are just looking for something to do, I don't think it would be worth the effort..

Thanks,

Jim R.
 
On the return side it goes stairs, pool return, slide and spa jets. (L-R) On the intake side, it goes spa drain, vacuum, skimmer, main drain (L-R). I have the spa drain closed all the time. The one time when I had the valves apart, it seemed like the spa drain one had water higher than the ball valve. Could it be leaking through maybe a small crack? Should I turn off all the valves on the intake side when I turn the pump off?
 
D,

As a test, and before the spa drains down, close both the Spa drain valve, on the Intake side, and then close the Spa jet valve, on the Return side.

Shut off the pump, and see if the spa drains down. I suspect it will not. I would wait overnight..

Please let us know what happens..

Thanks,

Jim R.
 

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D,

Most pools are set up to either be the Pool mode or Spa mode. This is normally done with two Jandy 3-way valves. One on the Intake side and one on the Return side of the plumbing.

With spillover spas, they will most often add a valve that steals a little of the water from the Pool mode side, and sends it to the spa, causing it to spillover into the pool.

What I think is happening to your spa, is the water is going backward out of your spa jets and flowing back into your pool via your return manifold.

If shutting of the red spa jet stops the backflow, then adding a check valve in that line will stop the backwards flow of the water from the spa.

Thanks,

Jim R.
 
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