Hydrostatic Relief Valves/Plugs

[pjt]

Do most pools come with hydrostatic relief valves/plugs? I'm wondering if I need (or want) them for my new build. Looks like the water table in my area is between 40 and 125 feet below the surface (The Woodlands, TX).

 

[Texas Splash]

It really depends on that water table. In your area, 40 ft may sound like a long way down until another Harvey comes up from the Gulf. Over-saturation is the concern. So a HRV or relief plug might be something to consider if you ever have to lower the water level in your pool for maintenance. Your county or local pool builders should have some good info to help you make that decision.

 

[pjt]

It really depends on that water table. In your area, 40 ft may sound like a long way down until another Harvey comes up from the Gulf. Over-saturation is the concern. So a HRV or relief plug might be something to consider if you ever have to lower the water level in your pool for maintenance. Your county or local pool builders should have some good info to help you make that decision.

Thanks! If I ever need to drain, I would definitely avoid doing it after a huge downpour.

 

[RDspaguy]

There are other factors to consider, such as soil composition, drainage, etc... I am no pool builder, but I have seen one float a foot out of the ground, halfway down a very long hill nowhere near the water table. I'd put them in. Better safe than sorry.

 

[pjt]

How many plugs are normally installed? Is one in the middle of the deep end sufficient?

 

[Texas Splash]

How many plugs are normally installed? Is one in the middle of the deep end sufficient?

I generally think of one HS valve in a drain, but there may other considerations based on pre-build/pre-install engineering concerns. @jimmythegreek any thoughts?

 

[pjt]

Should the plug be exposed or lightly plastered over to prevent potential leaks/aesthetics? I imagine hardly ever (maybe never) using it. I won't have a main drain.

 

[RDspaguy]

A hydrostatic valve is spring loaded with an o-ring. It should not be plastered over, and if it leaks you replace the o-ring and spring assembly.

 

[pjt]

I think I would want a plug instead of a valve with a spring. That way, I have simple, full control and avoid the risk of the valve failing.

 

[jimmythegreek]

Anybody installing a concrete pool needs provisions for a hydrostatic valve. Foolish not to have one. Usually in the main drain but if not using them they have a catch box with lid. How deep of a pool?

 

[pjt]

Anybody installing a concrete pool needs provisions for a hydrostatic valve. Foolish not to have one. Usually in the main drain but if not using them they have a catch box with lid. How deep of a pool?

Deepest is 5 feet. Here is my planned build:

New Build in The Woodlands TX - Update: Landscaping!

Getting ready for a new PB build in The Woodlands, TX. I'd love feedback, so please critique the design. Can't wait to get started! Overview: 47' x 23' Free-form Pool (no spa) 4'-5'-4' Depth Profile 12" Shelf 2 x Benches ~21k Gallons Pentair Equipment: IntelliFlo Pump 011028 520 Clean &...

www.troublefreepool.com