Waste pipe run too long

[pcsparky]

I have read the notes on this site for drainage in the bathroom and see that a 38mm waste pipe run should not be more than 2.3m long.

Our bathroom is 3m x 4m with the 4m being the farthest point from the outside wall. To maximise this space it is essential to have a shower waste that is going to be about 3.6m from the outside.

Any suggestions for making this work more effectively please?

 

[2face]

shower should be 42 mm, i would not worry as long as you have a fall to the outside,

you can only work with what you have. make sure you have an easy clean waste fitted incase you have to rod it later in life .

should be fine.

 

[seco services]

3m on a 40mm waste pipe.
but providing you have the fall correct it will be ok. and not through the joists.


42mm waste not in uk you won't.

 

[pcsparky]

Thanks guys. On its way to the outside it is going to pass a sink that I have yet to install. Can this be connected into the same pipe?

 

[seco services]

you can providing you have the right fall etc or it willbe coming up the shower tray or pulling the trap from the shower.

 

[2face]

i thought solvent was 42mm. push fit 40mm. ??

 

[seco services]

it should be measured internal
but as you say measure external they vary. which is what matters should all be the same size and inter changeable.

 

[wiggikins]

That's nominal size, a generalisation.

 

[2face]

solvent wont fit push fit and visa versa, does not matter anyway 40mm is right.. god knows were i got 42 from lol.. i might of been thinking the size of the core i use. old age you know it comes to us all beware.