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Extending Beyond A Drainage Cover.

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derekpara | 09:12 Tue 16th Sep 2014 | Property
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My son intends to have a rear extension built which would go beyond an existing drainage cover. I assume the cover would have to be moved/sealed. Is this a massive job ? How would it be done ?

Cheers.

D
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It depends on the direction of the drain underneath the cover.
Also.............. if it's yours alone, then it's quite possible to build over it as long as access is still possible. Not the best solution though.

Otherwise, seal it off and put another access in either upstream or downstream.

If it carries next door as well, then it's adopted by the local water company, and a whole different set of rules applies, Derek.
Question Author
Thanks to you both.

Not sure of direction of flow yet.

Builder, i thought under the latest regulations you couldn't have a drainage cover inside the property and access for clearing/rodding had to be outside.

Cheers.

D
It depends on the answer to my previous question, Derek.

Water Companies don't allow inspection covers inside buildings. They are involved only if the drain is actually a "sewer" ie it carries waste from other properties.

If it is your waste only, then they are not interested. It's a matter between you and your Building Inspector. A chamber is allowed, but must be fitted with a double-seal cover. For all kinds of reasons, it's far from ideal. Much better to dig up the chamber and insert a length of pipe to replace it.

Then, a new access could be provided outside the building, or divert the drain.
Question Author
Thank you, B,the picture is a lot clearer now.

D

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