Flexible 43mm Waste Pipe?

Question

Hello AllHad some fun and games at the sheds last weekend trying to get 40 mmpush fit connectors to fit a 43mm waste pipe, they didn't fit obviously(I thought my waste pipe was 40mm) however the weld type 40mmconnectors (Wickes) did fit snug, What's that all about then?Anyway on to my question anyone know where I can get flexible 43mmwaste pipe from? I have seen the 40mm but no 43mm. Failing that  isthere anyway I can adapt the existing waste pipe to be 43mm withoutreplacing the whole lot and the boss, which I have already looked intodoing. I think the boss is welded to the soil pipe which has been boxedin downstairs. Either way I cant shift it. I am attempting to route thewaste pipe under the floor and up between a stud wall and its provingto be a right bitch of a job.Help appreciated.TIARichard

Mike · Accepted Answer

Bit confused but agree 40mm pushfit is not same as 40mm solvent weld.  Ifsolvent weld stuff fits the existing pipework why not just get a tin of thesolvent and use that ?

r.rain · Answer

You mean fit a solvent weld 40mm connector to the existing pipe workand then join it to the 40mm  flexible waste pipe? ThanksRichard

Mike · Answer

More or less, though I'm not sure what you mean by 'flexible' waste pipe assuch stuff isn't permitted in the UK after the U bend AFAIU the regs.

Capitol · Answer

Consider using aquarium supplies flexible double skin pipe. Easy to fix with jubilee clips. Tends to be black however.	Regards	Capitol

John Stumbles · Answer

It's all nominally 40mm (old 1 1/2") however the solvent weld stuff is actually bigger (your 43mm).

Hepworth's 'hepflex' is a flexible waste pipe in lengths which you cut to your requirements and fit with ends for either push-fit or solvent-weld sizes (you can have different each end). You can get the pipe and fittings from BES (.ltd.uk)

FWIW there are also various couplings between push-fit and solvent-weld pipes including compression fittings, push-fit X solvent-weld and push-fit | push-fit in a larger size which'll take s/w pipe. BES do all these, too.

Ed Sirett · Answer

Although sold in IKEA with their sinks. However it is so bulky I've alwayschanged it for 'real' waste pipe.

Mike · Answer

Must go and look in IKEA. Had a long chat with technical rep from John Guest (Speedfit) about getting the flexible waste pipe Americans use on their macerators all the way to the outside and he assured me this wasn't legal in the UK.

r.rain · Answer

Great! cheers all

Flexible 43mm Waste Pipe?

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