Odd sized bath trap waste outlet ?

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Or maybe there is just something I don't know about?


Our new Ideal Standard bath came with this trap and over flow arrangement. It's part number is K8029AA.

Here is a photograph of it.


I was hoping to use 40mm solvent weld waste pipe, however I cannot get the trap to connect to it. As you will all know, 40mm solvent weld waste pipe actually has an outer diameter of 43mm.

The outlet from the trap has a diameter of 50mm. So here is my problem


As a solution I though about just binning the 50mm section. However the outlet direct from the trap is only 40mm and therefore my 43mm pipe is too fat to go in it. As show here.


The only solution I can think of is to saw the 50mm bit off, then use a compression fitting to join to my 43mm pipe, but it seems far from ideal and may not even work.

Have any of you come across this problem before, if so, how did you solve it?

Thanks in advance
 
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the OD of solvent weld pipe depends on the brand, not all is 43mm

From memory I think B&Q, Wickes and plumbnation is 40mm.
 
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the OD of solvent weld pipe depends on the brand, not all is 43mm

From memory I think B&Q, Wickes and plumbnation is 40mm.

The solvent weld pipe i've got is made by polypipe.

I don't think outside Diameter 40mm pipe would even fit. The diameter of the pipe going into it is about 38mm and the tapered washer creates a tight seal.



UPDATE : I was wrong about this bit of white pipe. I've now measured it accurately with a set of digital calipers and its outside diameter is 40mm (not 38mm), the hole in the Trap is 40.15mm. So here is an updated photograph.


Thanks
 
You must have an invisibility cloak on Dex, thats twice you have giving the op the correct advice but have been ignored :rolleyes:

Sorry, the reason I ignored it, is because I didn't fully understand it. :oops:

If I am supposed to use the 50mm to 40mm reducer and 50mm straight coupling on my black solvent weld pipe to make a short section of it 50mm pipe, I would also need a short length of 50mm pipe and a 50mm to 50mm compression fitting, both of which weren’t mentioned. I would then have an arrangement with 3 compression joints (2 on the 50mm to 50mm compression fitting and the 1 near the trap).

From doings loads and loads of googling late last night, I think the 40mm outlet on the trap could be a European 40mm size, so if I saw the 50mm bit off completely (or maybe buy a small bit of 40mm euro pipe, does anyone over here sell it?) I might be able to use one of these McAlpine European 40mm to UK 1.5 inch (uk 40mm) compression fittings.

http://www.mcalpineplumbing.com/was...ight-connector-x-40mm-european-pipe-size.html

But I will obviously still have 3 compression joins on the arrangement, which I wouldn't be happy about (I don’t like waste compression fitting at all, I find they always leak at some point, even 1 is 1 too many, and 3 is just asking for trouble).

In an ideal world the pipe manufacture (polypipe in this case) would make a UK 1.5 inch solvent weld to European 40mm fitting. There would then only be 1 compression join on to the trap. But sadly we don’t live in an ideal world.
 
Just an update.

I've decide to return this waste set up to the shop, and order a similar but different one.

It’s called an Ideal Standard E5795. It’s similar, but comes without a trap so I'm hoping I will be able to add a normal UK bath trap to it.

http://www.mytub.co.uk/bath-e5795-puw-assembly-working-parts-product-88768

However during my research (hours of googling), I found a solution that I think would have worked on that built-in European trap.

There are a few solvent weld components sold by a company called Sanifix that allow you to connect UK solvent weld pipe to continental traps etc. Here is a link to their website and the products. Could be one to bookmark chaps.

http://www.sanifix.co.uk/conversion_fittings.html

Thanks again for all the help.
 
If I am supposed to use the 50mm to 40mm reducer and 50mm straight coupling on my black solvent weld pipe to make a short section of it 50mm pipe, I would also need a short length of 50mm pipe and a 50mm to 50mm compression fitting, both of which weren’t mentioned. I would then have an arrangement with 3 compression joints (2 on the 50mm to 50mm compression fitting and the 1 near the trap).

Nope.

Wasn't necessary to return it. The 50mm straight coupling would glue onto the outlet pipe on the fitting, and onto the reducer at the other end. The black solvent weld pipe would glue into the reducer.

Ho hum, never mind. :rolleyes:
 
If I am supposed to use the 50mm to 40mm reducer and 50mm straight coupling on my black solvent weld pipe to make a short section of it 50mm pipe, I would also need a short length of 50mm pipe and a 50mm to 50mm compression fitting, both of which weren’t mentioned. I would then have an arrangement with 3 compression joints (2 on the 50mm to 50mm compression fitting and the 1 near the trap).

Nope.

Wasn't necessary to return it. The 50mm straight coupling would glue onto the outlet pipe on the fitting, and onto the reducer at the other end. The black solvent weld pipe would glue into the reducer.

Ho hum, never mind. :rolleyes:

Exactly, as long as the trap outlet was suitable for use with solvent weld..
I would think it probably was..
 
If I am supposed to use the 50mm to 40mm reducer and 50mm straight coupling on my black solvent weld pipe to make a short section of it 50mm pipe, I would also need a short length of 50mm pipe and a 50mm to 50mm compression fitting, both of which weren’t mentioned. I would then have an arrangement with 3 compression joints (2 on the 50mm to 50mm compression fitting and the 1 near the trap).

Nope.

Wasn't necessary to return it. The 50mm straight coupling would glue onto the outlet pipe on the fitting, and onto the reducer at the other end. The black solvent weld pipe would glue into the reducer.

Ho hum, never mind. :rolleyes:

Oh right, thanks, I've got it now. It was easy peasy. :oops:

However, how do you know that the fitting was made of a type of plastic that could be solvent welded? How do you know it's wasn't made of the same kind of plastic that say push fit pipe is made of? (I've read several times that push fit pipe cannot be solvent welded. Apparently push fit will initially give the appearance that it's welded ok, but over time the weld eventually breaks down and you gets leaks). How do you know that wouldn't have happened here?

Thanks
 
It's usually the case, but if in doubt a quick phone call would clear it up.

I've just thought of another reason why this might not work.

Solvent weld 50mm pipe actually has an outer diameter of 56mm.

This means a solvent weld straight coupling will have an internal diameter of 56mm


This fitting is exactly 50mm


So assuming I got it in centrally, there would be a 3mm gap all around. I would have thought that would to be too big a gap for the solvent to work its magic. Would you agree?
 

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