wickes 40mm waste pipe... 43mm

Just wondering about something,

Parents are fitting a bath back into the bathroom that was changed into a
shower room a few years ago, he needed some waste pipe, so nipped to the
local wickes, and bought a 3 meter length of 40mm white waste pipe,

He then proceeds to cut it to the size he needs, pokes it through the hole
in the wall, and tries to connect it up to the trap supplied with the bath,
pipe is too big,

So he tries the other end, fitting it into the boss in the soil pipe, too
big, then he notices printed on the side of the pipe is says it's 43mm.

Reciept says he bought 40mm pipe, label on the display says 40mm pipe,
didn't even know 43mm waste pipe existed,

Of course as he's cut it he cant have a refund or exchange, and they wont
accept it's their fault it dosent fit the bath's trap, they told him he
should buy wickes brand fittings and it will all fit then,

He went to Q&Q and got some real 40mm pipe instead, but i was wondering
where this 43mm waste pipe comes from, some new standard or something,
I am wondering if it's conduit pipe, as it's a hard plastic and not
flexiable at all like the 40mm pipe, but he says he picked it up in the
plumbing section,

Someone will doubtless come up with more on the standards (or lack of
them) but having suffered from the same problem you might look for the
word "universal" on plastic plumbing fittings in the sheds or wherever.
These have more "slop" and a big fat conical sealing washer which fits
various pipe sizes.

Apart from the nominal 1 1/4 and 1 1/2 inch ("sink" and "bath" waste
pipe) which goes into "compression" type fittings with rubber seals,
there are also solvent weld pipes.

Personally I would have said you have a strong case for a refund given
the clear mismatch between the labelling/receipt and the product.

On Sun, 7 Apr 2013 20:19:07 +0100, Gazz wrote:

> ... but i was wondering where this 43mm waste pipe comes from, some new
> standard or something,

The normal gotcha with waste pipe is that push fit/universal is a
different OD to solvent weld. Just measured some solvent weld at 43mm OD.

--
Cheers
Dave.

Forget about metric sizes for waste pipes; it's confusing. There are only two sizes of waste pipe: inch-and-a-half and inch-and-a-quarter. That's it. Forget about compression fittings; they're for wankers. They confuse the picture further by being slightly different diameter to solvent weld. More confusion comes in (with mm) when manufacturers specify the outside diameter instead of the inside and vice versa.
In summary:
Forget the sheds. Only ever go to a plumber's merchant and get either inch+half or inch+quarter solvent weld only and you won't go wrong.

What about 2 inch?

...
Except even they are not always compatible.

Colin Bignell

"Dave Liquorice" <allsortsn...@howhill.com> wrote in message
news:nyyfbegfubjuvyypb...@srv1.howhill.co.uk...
Ahhhaaa, that could well be it, the 43mm pipe seems to be a different type
of plastic to the 40mm one, it's more like electrical conduit pipe, so it
could well be solvent weld pipe after all,

I personally buy pipes from a builders merchant close to me, but my parents
seem to not want the 'hassle' so pay over the odds at the sheds, plus he
bought it on a sunday afternoon as he wanted the job finished.

The solvent weld stuff seems to be harder and more shiny than the push fit
stuff in my experience. I prefer solvent weld personally, once it is
installed, then it is there forever!

--
Toby... remove pants to reply

Solvent weld is deliberately made a little bigger. It will fit solvent
fittings and "universal" (i.e. compression) fittings. Sounds like the
trap was a push fit one. That's smaller and a slightly softer plastic.


--
Cheers,

John.

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The pipe sizes vary between manufacturers.
This means that push fit (O ring) and glueable pipe fittings are non-
interchangeable.

However the compression fittings fit everything but are more
expensive. They are dismantleable for if you get a blockage which is
good.

A blockage is good?

--
Frank Erskine

That may be true if you are buying all your pipe and fittings in one go.

But it's definitely *not* true if you need pipe to marry up with
push-fit fittings - as the OP found to his cost!
--
Cheers,
Roger
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On Sun, 7 Apr 2013 12:49:47 -0700 (PDT), orion....@virgin.net
wrote:
Bingo.

If you have the runs, yes.

Same happened to me - bought "40mm" pipe (marked on Screwfix label as 40mm) only to find that it was 43mm (printed by manufacturers on pipe).

This is when you need someone with experience.
There are 2 types of 40mm pipe, push/compression fit, and solvent weld.

Solvent weld is wider than push fit, and they cannot be interchanged.
There are some compression fittings that will accept it. The 40mm is
the internal diameter.

--
Alan
To reply by mail, change '+' to 'plus'

Yes, indeed - this crops up from time to time here - and is a trap
(sorry!) waiting for the uninitiated to fall into.

In article <bqvmfh...@mid.individual.net>, Roger Mills
<watt....@gmail.com> scribeth thus
Yes isn't it!, just think they'd err umm standardise on things like
that;!...
--
Tony Sayer

Well they *have* insofar that push-fit and solvent weld pipes are a
different size to prevent the wrong combinations of pipe and fittings
from being used. The only problem is that they're both *called* the same
- at least at first sight.

On Sun, 13 Apr 2014 18:22:51 +0100, tony sayer <to...@bancom.co.uk>
wrote:
There are: inch-and-a-half and inch-and-a-quarter (solvent weld).
Anything else is BS and/or a red herring.

43mm is normally the solvent weld type and 40mm is normally push fit simple

It's because 40mm is the inside pipe dimension and 43 is the outside dimension

40mm= hole size
43mm= overall pipe size

Its the same when you buy 32mm waste pipe it will say 36mm on the pipe but inside dimension will be 32mm

That depends on if its push fit or solvent weld - they are deliberately
different. (but you can couple them with universal (i.e. compression)
fittings.

Pipe sizes refer to the bore of the pipe and are nominal.
If you are mixing makes, you have to use compression fittings as they often don't fit/match.

Apart from when they refer to the external diameter, and are accurate!
Funny that, never had a problem mixing and matching 15mm, 22mm, or 28mm
copper pie from different makers.

Even with different brands of waste pipe, there is rarely a problem
mixing so long as you buy the right type (i.e. solvent weld or push fit)

Yep, funny that. I wonder if it's got something to do with those
British Standard thingies - like eg the way BS 5255 requires the outside
diameters of 32/40/50 mm uPVC wastes to fall within a 0.3mm range. But
perhaps Harry rolls his own.
--
Robin
reply-to address is (intended to be) valid

Smoking them after does not seem to be doing him any good either!

replying to orion.osiris, John wrote:
Actually there are 3 types of PVC waste pipe 11/4" (32mm) 11/2" (40mm) & 2"
(50mm) which come in solvent weld and push fit type. the wall thickness on the
push fit are slightly thinner so you cant use solvent weld fittings on push
fit pipe or vice versa. However you can use compression type waste fittings on
both types of waste pipe to join them together. Personally I would use solvent
weld waste pipe as especially beneath floor boards as you know once is glued
the job is generally done and no worries of any future leaks. Hope this helps!!

--
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Hope this helps too.

Don't you think orion.osiris would have finished his plumbing by now,
over 4 years later?