joe90 Posted January 22, 2017 Share Posted January 22, 2017 Getting down to the design of our plumbing and I was going to connect several 40mm bosses onto a horizontal soil pipe with toilets connected. If possible ( if the fall will allow me) I will connect them at 10 or 2oclock ( in the top half of the soil pipe) . Is this a no no or is it acceptable. Link to comment Share on other sites More sharing options...
PeterW Posted January 22, 2017 Share Posted January 22, 2017 Yep its fine - think @ProDave had a similar issue and @Nickfromwales did some expert doodles on the thread.. Link to comment Share on other sites More sharing options...
Nickfromwales Posted January 22, 2017 Share Posted January 22, 2017 ? Link to comment Share on other sites More sharing options...
Onoff Posted January 22, 2017 Share Posted January 22, 2017 (edited) It must be SO much easier starting from scratch rather than having to work round / modify old badly done stuff! Like my upstairs basin & shower wastes, all sagging pipes and leaking compression fittings! I ran the grey soil from the existing wc pipe in the loft and I also fitted the AAV to do away with a horrible, badly flashed detail that came up through the roof. I went "point to point", diagonally across the new bathroom ceiling as I was worried about the fall being slight. Reading this thread I wonder about turning the soil to run under the existing white, shower wastes then dropping the wastes into the soil run. I'd then have to turn through 90 deg with the soil towards the bottom of the photo. Is there a rule for how many solvent bosses you can have and a distance to keep them apart? The downside I see to this is if your sink/shower trap dries out or the soil backs up. Both avoided if the wastes enter a drain "normally". Much neater though! I know you can get non return valves that fit the wastes but I'd worry about hair blockages. Edited January 22, 2017 by Onoff Link to comment Share on other sites More sharing options...
PeterW Posted January 22, 2017 Share Posted January 22, 2017 Loving the bits of string on the wastes there @Onoff Link to comment Share on other sites More sharing options...
Onoff Posted January 22, 2017 Share Posted January 22, 2017 14 minutes ago, PeterW said: Loving the bits of string on the wastes there @Onoff PLEASE! It's 2.5mm single core cpc! (Blue used elsewhere). Link to comment Share on other sites More sharing options...
ProDave Posted January 22, 2017 Share Posted January 22, 2017 I was going to comment in a previous post about that CPC. I was going to ask if it was some previous 16th edition cross bonding gone wrong I didn't realise it was "supporting" the waste pipes. Some people install waste pipes thinking they don't need much support, not realising they get a lot heavier when the water runs through them. P.S the insulation on that stud wall wants an upgrade. Link to comment Share on other sites More sharing options...
joe90 Posted January 22, 2017 Author Share Posted January 22, 2017 Yes onoff, this is a first for me, a new build so all virgin territory, bliss. As an aside I am going to put a rodding eye at the end of the pipe run ( after the 50mm vent off shoot) so that if there are any blockages the length of horizontal pipe can be rodded yes the carpet has to come up but well worth the little expense I recon. we have guests at the mo but will post a diagram tomorrow with full details for you guys to pull apart ?. Link to comment Share on other sites More sharing options...
Onoff Posted January 22, 2017 Share Posted January 22, 2017 There's not a thing that doesn't need attention here that's for sure! The pipes were previously supported by blue baling string. That's the wc overflow coming vertically down. The smaller waste running under the dormer goes for about 8' unsupported so has a big bow in it. All under a glued chipboard floor. Going to gut the whole room, walls, floor and ceiling. Back on topic, these were the self sealing waste valves I mentioned above. Wondering if a good idea on a waste that goes into a soil pipe? http://www.screwfix.com/p/osma-waste-valve-white-x/1819K?kpid=KINASEKPID&cm_mmc=GoogleLocal-_-Datafeed-_-Heating and Plumbing&cm_mmc=Google-_-Product Listing Ads-_-Sales Tracking-_-sales tracking url&gclid=CI3U8ICo1tECFQgq0wodDwMJ9g Link to comment Share on other sites More sharing options...
Temp Posted January 23, 2017 Share Posted January 23, 2017 Looks like they have a thing like a plastic bag inside that forms the one way valve? Seems like an ideal place for stuff to get bunged up. Link to comment Share on other sites More sharing options...
Bitpipe Posted January 23, 2017 Share Posted January 23, 2017 Ah, the infamous 'Fanny Trap' as my plumbers called it. Correct name is a HepVo I believe. We looked into these when we realised that there was not enough clearance under the floor standing baths (on freshly tiled floors) for a normal trap. Decided against using them as when horizontal, they can get fouled with hair etc and will then allow smells back. Plumber was happier using them vertically. We ended chopping a nice hole in the floor to take a traditional trap for each bath. Link to comment Share on other sites More sharing options...
Temp Posted January 23, 2017 Share Posted January 23, 2017 Now that you mention it, it does look a bit like one of those devices used to collect a sample from a horse. Link to comment Share on other sites More sharing options...
ProDave Posted January 23, 2017 Share Posted January 23, 2017 That Hepvo unit is a "waterless trap" It allows something like an unvented HW tank blow off to be routed into a stack pipe (with certain strict conditions on what pipe to use). You cannot use a normal wet trap for that sort of application, as there is normally no water to keep the trap filled so it would evaporate and dry out. I will almost certainly be using one to avoid having to take the drain pipe outside. Link to comment Share on other sites More sharing options...
Onoff Posted January 23, 2017 Share Posted January 23, 2017 My wife & daughter shed hair like Cousin It so maybe I should avoid? I just like the idea they might protect against soil effluent coming back up into the shower if I dumped the shower waste into the soil via a boss. Link to comment Share on other sites More sharing options...
PeterW Posted January 23, 2017 Share Posted January 23, 2017 2 hours ago, Onoff said: My wife & daughter shed hair like Cousin It so maybe I should avoid? I just like the idea they might protect against soil effluent coming back up into the shower if I dumped the shower waste into the soil via a boss. Wirquin have brought out a waterless shower trap that has a removable filter and can all be serviced from the top - worth a look as it's the best of both worlds. Link to comment Share on other sites More sharing options...
Onoff Posted January 23, 2017 Share Posted January 23, 2017 3 minutes ago, PeterW said: Wirquin have brought out a waterless shower trap that has a removable filter and can all be serviced from the top - worth a look as it's the best of both worlds. Ta. I'll have a look. Be a lot easier if they both got the clippers out and did a Sinead O'Connor! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now