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Old June 12th 08, 08:42 AM posted to uk.d-i-y
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Default Sink Waste

Hi,

No installing the bathroom sink, although I have the following dilemma
which I'm sure is common and so must have a really simple answer,
which I am struggling to find.

The plug hole waste from my sink is 1 1/4" (32mm) however the waste
pipes installed are around 40mm. When I have looked to buy a bottle
trap they are all 38mm so wont fit my sink waste although the waste
pipe end of the trap will fit the 40mm pipe I have. I then bought a
pedestal trap as it is a pedestal sink which is 32mm, so fits the sink
but then the waste pipe end is 32mm aswell and so is too small to
connect up to my pipework.

I have bought a reducer which has allowed me to put a section of 32mm
pipe coming out of the pedestal trap into the reducer which then fits
to the 40mm pipe. However, this appears to be leaking.

Is there a simpler way of doing this or traps that have say 1
1/4" (32mm) to fit the sink with 40mm fitting at the pipe end?

Where woudl you recomend buying these pasrts from? I bought my
pedestal trap from toolstation but it wasn't the best and took me ages
to get it to screw on tightly to the sink as it didnt appear to have
enough thread.

Thanks

Tom

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Old June 12th 08, 08:56 AM posted to uk.d-i-y
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First recorded activity by DIYBanter: Jul 2006
Posts: 1,066
Default Sink Waste


"Thomarse" wrote in message
...
Hi,

No installing the bathroom sink, although I have the following dilemma
which I'm sure is common and so must have a really simple answer,
which I am struggling to find.

The plug hole waste from my sink is 1 1/4" (32mm) however the waste
pipes installed are around 40mm. When I have looked to buy a bottle
trap they are all 38mm so wont fit my sink waste although the waste
pipe end of the trap will fit the 40mm pipe I have. I then bought a
pedestal trap as it is a pedestal sink which is 32mm, so fits the sink
but then the waste pipe end is 32mm aswell and so is too small to
connect up to my pipework.

I have bought a reducer which has allowed me to put a section of 32mm
pipe coming out of the pedestal trap into the reducer which then fits
to the 40mm pipe. However, this appears to be leaking.

Is there a simpler way of doing this or traps that have say 1
1/4" (32mm) to fit the sink with 40mm fitting at the pipe end?

Where woudl you recomend buying these pasrts from? I bought my
pedestal trap from toolstation but it wasn't the best and took me ages
to get it to screw on tightly to the sink as it didnt appear to have
enough thread.


You can buy all the stuff from B&Q. They are pretty cheap, even there.

Basins are 32mm, baths 40mm

You either have to run the basin separately in 32mm to the soil stack
(preferred in the sense it stops gurgling) or run it into the 40mm bath
waste. This will always require a reducer or an unequal T

The reducer should not leak, any more than any other push fit (or
compression fitting)


--
Bob Mannix
(anti-spam is as easy as 1-2-3 - not)


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Old June 12th 08, 06:27 PM posted to uk.d-i-y
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First recorded activity by DIYBanter: Jul 2006
Posts: 2,231
Default Sink Waste

On Thu, 12 Jun 2008 00:42:39 -0700, Thomarse wrote:

Hi,

No installing the bathroom sink, although I have the following dilemma
which I'm sure is common and so must have a really simple answer, which
I am struggling to find.

The plug hole waste from my sink is 1 1/4" (32mm) however the waste
pipes installed are around 40mm. When I have looked to buy a bottle trap
they are all 38mm so wont fit my sink waste although the waste pipe end
of the trap will fit the 40mm pipe I have. I then bought a pedestal trap
as it is a pedestal sink which is 32mm, so fits the sink but then the
waste pipe end is 32mm aswell and so is too small to connect up to my
pipework.

I have bought a reducer which has allowed me to put a section of 32mm
pipe coming out of the pedestal trap into the reducer which then fits to
the 40mm pipe. However, this appears to be leaking.

Is there a simpler way of doing this or traps that have say 1 1/4"
(32mm) to fit the sink with 40mm fitting at the pipe end?

Where woudl you recomend buying these pasrts from? I bought my pedestal
trap from toolstation but it wasn't the best and took me ages to get it
to screw on tightly to the sink as it didnt appear to have enough
thread.

Thanks

Tom


There is considerable confusion over the sizing of waste pipes.

Basin/bidet stuff is "32" mm that about the diameter of the threaded
outlet of the waste, the pipes are 35mm (pushfit, BS 5454) and 37mm
(solvent weld).

Sink/bath/shower stuff is "40"mm the waste outlet is about 38mm,
the pushfit pipe about 40mm and the solvent weld pipe (BS 5455) about
42mm OD.

To go from one sort of waste pipe there are a various sorts of adaptor.




--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html



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