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CplDevilDog 04-20-2012 02:17 PM

Waterproof Pool Bottom Drain?
Anyone have any experience, tips or resources on setting Pool Drains in concrete?

I am doing a Koi Pond with a Bottom Drain. Something similar to this

All of the resources I find seem to apply to locking the collar to a EPDM liner.

The closest I could get was this link here

Seems the smart money would be on some type of hydraulic cement "ring" around the body of the drain to create a gasket effect but I don't see anyone recommending that.

I'll be on a 4" slab over gravel followed up by a top coat of Xypex Megamix WP cement.

oh'mike 04-21-2012 06:29 AM

Is that designed to clamp onto a rubber or PVC membrane?

Not sure that's the correct drain for concrete installation.

I've never built a concrete pond--only helped with a rubber lined one---

Look at Latacretes site---Hydroban---paint on waterproofing for pomd--pools and showers.

A concrete worker will chime in soon---Mike---

CplDevilDog 04-23-2012 06:52 AM

Thanks Mike,

Yes, that particular model I linked to has a locking collar that clamps down but I believe there are a lot of pond guys that are using it in concrete.

They are setting the fixed part of the bezel level with the concrete and then parging their waterproofing layer over the top of it.

Seems to me, there should be some sort of waterproof ring around the body of the drain. Similar to bentonite clay or rubber gasket between a footing and a poured concrete wall, that swells when water contacts it.

Don't know though, first pool. :huh:

CplDevilDog 04-23-2012 07:47 AM

Thank you, William Spence's Construction Materials, Methods and Techniques 2nd Ed.

Officially referred to as Strip Applied Waterstop Systems

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