newshound wrote:


wrote in message ...
We have a flat which was originally plumbed with BS3505 plastic pipes.

I need to re-plumb a section which starts as the old BS3505 pipe and
ends with modern 15mm push fit. The re-plumbing will involve removing
the existing converter from old to new. As the BS3505 bits are glued
(solvent welded) I can't re-use the converter very easily.

So, where can I get some sort of converter to go from the old plastic
pipe to modern sizes? I can't find anything about BS3505 at BES and a
Google Shopping search tells me nothing except that a copy of the
standard will cost me £92! :-)

The old pipe is marked:-

Yorkshire Imperial Polyorcb
BS3505 1/2" CL E

(Not absolutely sure about some of that)

--
Chris Green

Never come across this before and don't know about converters, but from BS
3505:1986, the pipe is UPVC and for half inch nominal, the OD is 21.2 to
21.5 mm and the wall thickness 2.1 mm. It's rated to 15 bar.

Yes, I found that much too.


If you've access to machine tools, you could buy a short length of solid
UPVC round bar from ebay, bore one end to take the old pipe and tap the
other end to take a suitable modern brass fitting. Then glue the old pipe
into your new converter making sure you use cement intended for PVC (not
ABS).

That's one approach I suppose!


I don't know if you might just get away with a modern 22 mm push fit
connector. But I suspect that if a 22 mm insert was a reasonably snug fit,
you might get away with using a 22 mm compression fitting (with a metal
olive) on it. Don't try it without an insert, though.

A 22mm insert will be nothing like the right size will it? The walls
of the BS3505 pipe are *much* thicker than 22mm push fit plastic pipe
aren't they?

--
Chris Green