Pocster Posted April 10, 2020 Share Posted April 10, 2020 Getting near the point I have to install this . The trap unfortunately sits over a steel beam so I’ll need to fit It to the tray before I install . First question . Loads of contradictions online . Bed shower tray in sand/cement or tile adhesive ? . Does it really matter ? - some claim sand/cement can crack . Here’s the supplied waste . The 32mm pipe doesn’t seem to fit nicely into fitting . The black rubber washer cannot fully compress on tightening . Just feels a bit unreliable.... Link to comment Share on other sites More sharing options...
Pocster Posted April 10, 2020 Author Share Posted April 10, 2020 42mm not 32mm pipe . Link to comment Share on other sites More sharing options...
Temp Posted April 10, 2020 Share Posted April 10, 2020 I don't see why being over a steel beam means you have to fit it to the tray first before bedding the tray. Mine was over a concrete beam and block floor with no access from below. You position the trap and dry fit the pipes. Then test fit the tray to check position of trap is ok. Then solvent weld pipes and test for leaks. Then mortar bed for the tray. Lower tray onto mortar and check trap lines up. Silicon around the trap hole then fit top part of trap through hole in tray into bottom part. Link to comment Share on other sites More sharing options...
Russell griffiths Posted April 10, 2020 Share Posted April 10, 2020 Did you get your pet beaver to chew that pipe to length c,mon bud you can improve on that. Or or I will inform @Onoff Link to comment Share on other sites More sharing options...
Pocster Posted April 10, 2020 Author Share Posted April 10, 2020 27 minutes ago, Russell griffiths said: Did you get your pet beaver to chew that pipe to length c,mon bud you can improve on that. Or or I will inform @Onoff Lol . That was just a test piece of pipe I grabbed - that was just lying around Link to comment Share on other sites More sharing options...
Pocster Posted April 10, 2020 Author Share Posted April 10, 2020 1 hour ago, Temp said: I don't see why being over a steel beam means you have to fit it to the tray first before bedding the tray. Mine was over a concrete beam and block floor with no access from below. You position the trap and dry fit the pipes. Then test fit the tray to check position of trap is ok. Then solvent weld pipes and test for leaks. Then mortar bed for the tray. Lower tray onto mortar and check trap lines up. Silicon around the trap hole then fit top part of trap through hole in tray into bottom part. It’s over a steel beam with a concrete beam next to it - not sure I can reach underneath for access - which I don’t like . I’ll break out the block around it and gain as much access from underneath as I can Link to comment Share on other sites More sharing options...
Pocster Posted April 10, 2020 Author Share Posted April 10, 2020 2 hours ago, Temp said: I don't see why being over a steel beam means you have to fit it to the tray first before bedding the tray. Mine was over a concrete beam and block floor with no access from below. You position the trap and dry fit the pipes. Then test fit the tray to check position of trap is ok. Then solvent weld pipes and test for leaks. Then mortar bed for the tray. Lower tray onto mortar and check trap lines up. Silicon around the trap hole then fit top part of trap through hole in tray into bottom part. The supplied tee is not solvent weld Link to comment Share on other sites More sharing options...
Temp Posted April 10, 2020 Share Posted April 10, 2020 14 minutes ago, pocster said: The supplied tee is not solvent weld Sorry yes I just mean you connect up the pipes before paying the tray. Mine needed a 45 degree bend and short length of pipe (which I did in solvent weld) plus the 45 degree bend that came with the trap (which was a compression fitting). 1 Link to comment Share on other sites More sharing options...
Pocster Posted April 11, 2020 Author Share Posted April 11, 2020 19 hours ago, Temp said: Sorry yes I just mean you connect up the pipes before paying the tray. Mine needed a 45 degree bend and short length of pipe (which I did in solvent weld) plus the 45 degree bend that came with the trap (which was a compression fitting). Still don’t like the supplied tee . With no pipe in it the rubber washer sits fine . Around the pipe it won’t actually screw in . Just doesn’t seem right . Will stick up some photos soon . Link to comment Share on other sites More sharing options...
Pocster Posted April 14, 2020 Author Share Posted April 14, 2020 Here are the photos As you can see rubber ring in fitting no problem . Around pipe - it’s just not going to fit - this can’t be right can it ? ( pipe is 42mm ) Link to comment Share on other sites More sharing options...
joe90 Posted April 14, 2020 Share Posted April 14, 2020 (edited) Is it solvent weld pipe ? If I remember solvent weld pipe is a little bigger than compression, also make sure pipe is fully inserted into socket , then push rubber into socket with some silicone lube. This is a problem with mixing compression with weld fittings (but they should go in.) just found this. An example: A 40mm push-fit pipe has a 40-41mm external diameter but a 40mm solvent pipe has a 43mm external diameter. The difference between the two means they aren’t directly compatible Edited April 14, 2020 by joe90 1 1 Link to comment Share on other sites More sharing options...
Pocster Posted April 14, 2020 Author Share Posted April 14, 2020 1 hour ago, joe90 said: Is it solvent weld pipe ? If I remember solvent weld pipe is a little bigger than compression, also make sure pipe is fully inserted into socket , then push rubber into socket with some silicone lube. This is a problem with mixing compression with weld fittings (but they should go in.) just found this. An example: A 40mm push-fit pipe has a 40-41mm external diameter but a 40mm solvent pipe has a 43mm external diameter. The difference between the two means they aren’t directly compatible Yes . The pipe I’m using as an example is solvent weld . I’ll try and get a push fit pipe ; as a small diameter . Assuming that works still want to ‘convert’ as soon as I can go solvent weld . Presumably I’ll need some form of compression joint that will take 40mm and 43mm ? I.e compression pipe in , solvent weld pipe out . Link to comment Share on other sites More sharing options...
Onoff Posted April 14, 2020 Share Posted April 14, 2020 Probably no help at all this..... My Geberit wall drain (the silver thing on the left) had a 50mm outside dia pipe coming out the side. MDPE I believe, same stuff as their flush pipes. (Yet to be shortened in the photo). My black, "2 inch" solvent weld pipe on the right had an outside diameter of nom 56mm. The white coupler in the middle is a McAlpine Multifit one. They do various ones to cater for "BSP" one end / "European" the other. Think it was @ProDave had loads fof grief when "50mm" wasn't 50mm or something like that. Can be a bit of a minefield. https://mcalpineplumbing.com/plastic-chrome-fittings/multifit-waste-fittings/s28l-isoc-multifit-straight-connector-multifit-x-european-pipe-size There's tecnical drawings on that McAlpine link above. This is the one for mine: 1 Link to comment Share on other sites More sharing options...
ProDave Posted April 14, 2020 Share Posted April 14, 2020 It was me that bought a 110mm to "50mm" adaptor from ebay. When I got it I found my "50mm" solvent weld pipe (which is actually about 56mm) would not fit, not even remotely close. I then found the fitting was made to take pipe that was 50mm outside diameter, and I never did find any UK pipe that was actually 50mm diameter. The ebay seller got shirty when I left negative feedback saying "This does not fit any UK size pipe and should not be on sale in the UK. Avoid" 2 Link to comment Share on other sites More sharing options...
joe90 Posted April 14, 2020 Share Posted April 14, 2020 (edited) @pocster I think this is what you need. https://www.bes.co.uk/polypipe-universal-40-mm-white-to-solvent-socket-abs-11142?ref=gs&photo=true&gclid=CjwKCAjwvtX0BRAFEiwAGWJyZOkfNqHDOsCN8hUBkVPfApVCdqPiG2oDvHGSJ-VeoqKinkvk_4IGExoCm88QAvD_BwE Edited April 14, 2020 by joe90 1 Link to comment Share on other sites More sharing options...
Pocster Posted April 14, 2020 Author Share Posted April 14, 2020 1 hour ago, joe90 said: @pocster I think this is what you need. https://www.bes.co.uk/polypipe-universal-40-mm-white-to-solvent-socket-abs-11142?ref=gs&photo=true&gclid=CjwKCAjwvtX0BRAFEiwAGWJyZOkfNqHDOsCN8hUBkVPfApVCdqPiG2oDvHGSJ-VeoqKinkvk_4IGExoCm88QAvD_BwE Awesome ! Will order one ? Link to comment Share on other sites More sharing options...
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