Hi and bathroom question

B

Benny

Messages

6

• Apr 9, 2019

• #1

Hi,

I am a DIYer that is stuck! I would like to fit a floor level shower grate in a wooden floor wet room. I have 2 options for the outflow:

1. Into the horizontal 110mm waste. I would use a boss into the side of the pipe. My concern is that the toilet waste will be higher than the shower floor. Will the waste back up into the shower when the loo is flushed?

2. A long an convoluted run of 40mm under the bedroom floor, out of an external wall and into an external drain.

Any help would be massively appreciated.

Cheers,

Ben

 

W

WC1

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1,253

• Apr 9, 2019

• #2

pic, drawing?

 

B

Benny

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6

• Apr 9, 2019

• #3

Thanks.

 

SimonG

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21,026

• Apr 9, 2019

• #4

Where does the 4" go?

 

B

Benny

Messages

6

• Apr 10, 2019

• #5

It goes 2.5m horizontally (slight decline) to the vertical 4 inch waste.

 

Darren Jackson

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1,021

• Apr 10, 2019

• #6

It will be ok to fit it to the 110mm soil pipe. if the shower grate has not got a built in trap though you will need to install an inline trap between the 110mm & the grate. fyi a 40mm waste pipe should not be run for more than 4m without upgrading it to 50mm. and I doubt you would be able to get a sufficient fall on such a long run anyway. so that option is probably no good to you anyway.

 

B

Benny

Messages

6

• Apr 10, 2019

• #7

Thanks Darren, there is a trap built in. So even though a loo will be connected to the 110mm soil "above" the shower waste level there won't be any back flow? Cheers.

 

Riley

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10,833

• Apr 10, 2019

• #8

Is it up stream or downstream of the shower

 

Riley

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10,833

• Apr 10, 2019

• #9

sorry I’m a bit late to the party. Ignore me

 

B

Benny

Messages

6

• Apr 10, 2019

• #10

Hi Riley, the toilet is upstream of the shower. The shower outflow will be below floor level. Will it be ok? Sorry to panic, I just don't fancy s**t coming up from the floor!

Cheers.

Riley said:

sorry I’m a bit late to the party. Ignore me

Click to expand...

 

Darren Jackson

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1,021

• Apr 11, 2019

• #11

The only time raw sewerage would come up through the shower grate would be if you were unlucky enough to have a main blockage in the underground drains or inspection chamber. Through normal use there will not be an issue with back flow unless you intend to connect to the underside of the 110mm.

 

B

Benny

Messages

6

• Apr 11, 2019

• #12

Darren Jackson said:

The only time raw sewerage would come up through the shower grate would be if you were unlucky enough to have a main blockage in the underground drains or inspection chamber. Through normal use there will not be an issue with back flow unless you intend to connect to the underside of the 110mm.

Click to expand...

Thanks Darren, that's great. I have a week to finish the bathroom before my wife returns from an overseas trip and I've already wasted 2 days worrying about this!