Plumbing help - pipe sizes!!

Wherryman

A standard 15mm compression fitting will fit an old 1/2" copper pipe but the olive will be a very tight fit and the pipe will need to be cleaned down to the copper (ie. no paint or grot) with wire wool (or similar). If you want to use a solder (yorkshire) type fitting then a 15mm to 1/2" adaptor would be needed as an ordinary 15mm coulping will be just too tight to fit.

Incisor

woodbutcher wrote: »

I'm not so sure myself.Was old copper pipe 1/2"? Seems a big discrepancy between that and 15mm.About 1/8" and i'm sure he said fitting was too small which would make old stuff bigger than 15mm.

As i say,not a plumber so maybe best talk to a plumbers merchant.

0.5inch imperial pipe was Inside Diameter, 15mm pipe is Outside Diameter, if I recall correctly, which makes them so very nearly, but not quite, the same diameter.

cubegame

As it happens I had trouble getting to a plumbing shop so had to send my good lady with a clear description.

Unfortunately the 12 year old behind the counter didn't have a clue so she came away with three possible candidates, none of which are suited!!

I think a trip myself tomorrow is in order. Currently have managed to patch the join using a 15mm push fit plastic coupler which is doing the job with only a drip or two.

woodbutcher_2

Thanks for the info incisor.So cleaning it up and rubbing down to slightly reduce the diameter would be an option for future reference?I made that point in an earlier post but wasn't sure.

Incisor

woodbutcher wrote: »

Thanks for the info incisor.So cleaning it up and rubbing down to slightly reduce the diameter would be an option for future reference?I made that point in an earlier post but wasn't sure.

Yes, it's close enough, but you do need to be a bit fussy about getting it right. If you use emery, take care to clean the pipe well before attempting to put it in a fitting, because sometimes the grit can wedge it firm, when you just want a trial fit.

Inactive

plumb1 wrote: »

There is no such fitting, you will have to file the 1/2" pipe down, to accept the 15mm.

Strange, what are these then?, second item down...:rolleyes:

http://www.toolstation.com/shop/PlumbingampHeating/SolderRing/d20/sd2699

cubegame

Well. I know what I want but I can't get hold of one.

Armed with the knowledge of asking for a 1/2 inch to 15 mm coupler every plumbing supplier just says use a 15mm coupler!!!

Arghhh.

I was even told that Plumb Center do a 16gauge/16mm to 15 mm coupler for this very purpose but they hadn't a clue.

Can anyone help with an internet retailer link?

Thanks

woodbutcher_2

Theres a link to them in toolstation in the post above yours by Inactive.

cubegame

woodbutcher wrote: »

Theres a link to them in toolstation in the post above yours by Inactive.

I was after a compression fitting. I doubt my soldering skills are up to the job.

Nilrem

Soldering with those sorts of fittings is very simple, they have the solder already in the fitting, so you just need to make sure the ends of the pipes are clean, and to apply a bit of flux, then heat it with a blowtorch for a couple of minutes until the solder flows (making sure you get the back/sides as well as the front of the joint;)).