Building Over Collector Drain - Combined Sewer

godtabh

Drawing planning drawings for my own extension.

Measured out yesterday and it would sit over a collector drain. This drain runs parallel to the house at the rear.

It appears my drain connects into the sewer in my next doors neighbours garden. I assume the same happens to up me stream.

It would appear that the neighbour has built over upstream.


Ideally I'd divert it but that would severely impact on the extension. Or add a few inspection chambers along the way?

What is the protocol here?

Johnnyhpipe

Hi,

Nothing wrong with building over the drain provided its roddable from both sides and that the foundations do not impose load on the pipe. Your engineer can ensure this by lean mixing down to pipe invert level just locally either side of the pipe and bridging over as required.

Nothing wrong in principle though.

Wildly Boaring

Johnnyhpipe wrote: »

Hi,

Nothing wrong with building over the drain provided its roddable from both sides and that the foundations do not impose load on the pipe. Your engineer can ensure this by lean mixing down to pipe invert level just locally either side of the pipe and bridging over as required.

Nothing wrong in principle though.

Well unless it's a sewer belonging to Irish Water and they have a permanent way leave on it.

Johnnyhpipe

Wildly Boaring wrote: »

Well unless it's a sewer belonging to Irish Water and they have a permanent way leave on it.

Correct.. when OP mentioned collector drain I assume this to be a private shared drain which serves typically 6-7 houses as is common throughout Dublin City but is not taken in charge.

Sorry, I may have picked this up wrong though.

godtabh

its a private drain running in the back garden. Its probably 50 years old.

Will try and get record drawings from IW but I'd doubt its theirs.