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Old 10-29-2012, 11:53 PM   #1
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Backwater Valve Installation


We have just had a backwater valve installed as part of our drainage system which sits about 38 inches below our basement floor.

In order to provide access to the valve (for maintenance purposes), 2 1/2 valve boxes which create a hole above the valve were stacked one top of the other bringing the last box to the basement floor level.

The problem is - the hole fills with water which covers the valve with about 18 inches of water.

We've drained the water out, but within a few hours the hole has filled up again to about 18 inches. It seems to vary slightly 1-3 inches for now. We can actually see a small stream of water flowing back into the hole.

We've asked around...and get a variety of rationales; water table is high, water is normal, don't worry the water is safe, plumber should have built a self-contained box to prevent the ground water from entering the valve box..

Question:
Is this normal? What can we consider our installation to be up to standards? Should the valve be sitting in 18 inches of water? or should it be in a dry pit? Will water rise even more and pose a flood threat to the basement? Is the stagnant water a health concern?

The attached top view picture (drop box) shows the first 1 1/2 valve protection/access boxes, the third box is submerged under water and the backwater valve sits on the very bottom of the hole. https://www.dropbox.com/s/d4h40u1c0w...ve%20boxes.jpg

Help! thoughts, course of action. [IMG]https://www.dropbox.com/s/d4h40u1c0wr7ko2/top%20view%20backwater%20valve%20boxes.jpg

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Old 10-30-2012, 12:17 AM   #2
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Backwater Valve Installation


This link shows the type of backwater valve I use- no boxes needed.
http://cleancheck.rectorseal.com/
You don't want stagnate water.

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Old 10-24-2014, 10:52 AM   #3
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Backwater Valve Installation


Hi CCCron,

It's obviously been a couple of years since you posted your message but I'm wondering if you've had any issues with the water in the hole where the backwater valve was installed? I ask because we recently got one installed and have about 10" of water inside the hole as well. Thanks.
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