Drainage Question

[TheScullster]

Hi all

I am in the process of having building works done and the contractor started by sorting the drainage. For various reasons this is an extra and involved:

Removing existing gully and replacing with new. Adding 2 additional gullies. Adding 1 inspection chamber 500 dia (6 connection) Supply/fit about 12m pipe About 12 elbows, couplers etc Connecting above to existing clay pipe.

This took one man 3 days with about 1/2 day additional time total from boss man (in 4 visits).

Question 1

The attachment to the existing clay pipe was made using a thick rubber reducing sleave. Looked like it was purpose made admittedly, secured with jubilee clips round to both plastic and clay. Struck me as odd that the fitting attached around the O/Dia rather than sleaving into the I/Dia of the clay in the flow direction. Didn't see whether the plastic slid inside the clay or not! Is this rubber joint common practice? (On the positive side, the clay pipe was under an extension wall and this rubber joint would give some allowance for movement between plastic and clay pipes).

Question 2

How much should this cost including moving paving slabs, digging out, refilling with shale and relaying slabs? The site is East Yorkshire.

TIA

Phil

[keith_765]

The answer to question 1 This is general practise, to connect the old type clay drain pipe to plastic. The reason for the rubber tube connector and stainless steel jubilee clip is, the old type clay pipes are not perfectly round as are the newer hep type.

[Set Square]

Yes. This method is used by water authorities when replacing sections of broken sewer pipe. They replace clay with plastic and join the new bit in with these rubber couplings both ends. Ideally, the ID of the two pipes should be very similar, and the pipes are butted more of less together for straight-through flow.

Haven't a clue! Didn't you get a quote *before* proceeding?

[John Stumbles]

Well even if there's a discontinuity there it'll get filled in and smoothed by a, er, naturally occurring sealing compound

Assuming that was all included in the 3 days maybe £600 - £900?

The OP said "For various reasons this is an extra"

[Set Square]

So it wasn't part of the *original* project. I'd still want to know how much 'extras' were going to cost before authorising them!

[Rick]

Just guessing .....

Say 4 man days, at 8 hours a day, 10 quid an hour = 360 quid Machinery hire 70 quid a day = 280

pipes, couplers etc a few hundred quid

your well on your way to a grand.

Rick