Hello! I’ve got a house that was built in 1928, I’m currently trying to put a new bathroom in (it’s old style next to kitchen) the mains flow pipe comes up from the floor in the bathroom. I measured its outer diameter and it’s 88.9cm or 3 1/2 inches. Now I thought it would be a 28mm fitting but it’s just a tad too big. Does anyone know what size fitting I could use please? Im trying to find a 90degree elbow, as it’s an old imperial one from back in the day I’m stuck and have no water at the moment! Any help would be much appreciated
3 inch diameter water pipe is still massive.. I suspect that the following is what you will need, as my guess is you have imperial 3/4” copper pipe which is about 25mm.. https://www.ukhps.co.uk/philmac-103...CYhqyIt57iKrrqN6eNDri4DIzfki8OUkaAr_eEALw_wcB
OP, something weird about a 1928 house having a copper mains and a 31/2" cu mains at that? Are you saying that this is a ground floor bathroom with the cu supply pipe from the external stop-tap entering the house/coming up through the bathroom floor? Is the floor solid or suspended? Where's the internal stop-tap? Some photos would help?
hi, that’s right, ground floor bathroom with a copper pipe coming up from the floor from outside mains. Using a tape measure wrapped around the outside it’s touching 90mm (looking at charts it’s more like 88.9mm or 3.5 inches) let me see if I can sort out some decent photos
There are many other different options, some depending on your plumbing skills, even a simple 3/4” to 22mm end feed reducing coupler would probably work. Screwfix item 74038 for example.
It appears that the OP is confusing diameter and circumference. Using circumference = π x diameter, a 90mm circumference is around 28mm diameter. So work with a 28mm to 22mm coupling and then it's 22mm and 15mm from there onwards.
Those latest photos look like it’s a steel pipe.. that plastic adaptive coupling I first linked will be the easiest fix
Thanks for the photos. Agree with Hausfix that it looks like steel, and simply laying a coin on top & posting a photo would immediately give us a scale. No internal shut-off in sight - did you use the external shut off for isolating the house supply? You have some other issues in the bathroom if your interested?
You need CD a 3/4“ x 28mm adapter https://www.screwfix.com/p/flomasta-solder-ring-adapting-couplers-22mm-x-2-pack/74038 Or, probably easier, use a 28mm compression socket with a 3/4” olive on the old pipe end: https://www.screwfix.com/p/flomasta-compression-olives-28mm-20-pack/92685
You sure that's not lead? Try taking a nick out of the side with a stanley blade - if you can shave a bit off it's not steel. If it is lead, use a philmac (as mentioned above) or lead-loc to get on to copper.
I thought that at first, but if you look at pic 5/6, there appears to pitting and rust that you’d see on an old steel pipe, as well as the orange deposits inside the pipe which are normally light grey with lead pipe.