Two separate shower traps?

Discuss Two separate shower traps? in the Tiling Forum area at TilersForums.co.uk

Cranbrook

Professional Tiler
Currently doing a few bathrooms in a high end new build, and the water pressure and flow rate are both very high, and the customer is adamant he wants the showers as powerful as can be... my concern is that if I screed in only a single waste, its not going to cope, ive seen a few companies do double or triple traps on one waste, but has anyone ever put two separate wastes in one wet room?
 
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Waluigi

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I’ve installed Linear drains with two traps, I think it was an impey Dec.
 
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Waluigi

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Just to add, calculate the flow rate of your showers vs the flow rate of your traps. Some traps are better than others at letting water pass through them quickly
 
OP
Cranbrook

Cranbrook

Professional Tiler
Just to add, calculate the flow rate of your showers vs the flow rate of your traps. Some traps are better than others at letting water pass through them quickly
Unfortunately the showers aren't in yet so it's a bit of educated guess work at present :weary:
 

pdc

Only a Handyman...
Trusted Advisor
Professional Tiler
Waste flow is ultimately limited by pipe size. If that is already in place then you can only fit the highest flow trap that you can find.
 
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Waluigi

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Just had a quick look at some wastes- ranges between 40 to 60 litres per minute on the couple I looked at.

60 litres.........That’s a lot of water.
 
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Waluigi

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I agree with PDC, it’s always best to add a 2” (50mm) waste instead of relying on 1”½(40mm) that is often already in place.

Edit: it’s also worth noting the maximum pipe lengths and gradients for your wet room. All of this data can be found in Part H:-

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pdc

Only a Handyman...
Trusted Advisor
Professional Tiler
All depends on whether you're using formers or trays and what your options for traps are. 50mm pipe will obviously have more flow than 40mm and if you can run 2 separate ones to the soil stack ( not 2 into 1 before the stack) even better.
 
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Cranbrook

Cranbrook

Professional Tiler
All depends on whether you're using formers or trays and what your options for traps are. 50mm pipe will obviously have more flow than 40mm and if you can run 2 separate ones to the soil stack ( not 2 into 1 before the stack) even better.
Yeah I can run two straight in to the stack and that's my current thought, I'm going to screed the trap/traps in
 

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