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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Advisable to combine bathroom wastes?
Redoing ground floor bathroom. At present I have three seperate waste
pipes for water softener, basin and bath all going to a gully outside. Would it be possible to run just one waste pipe with two branches joining it to the gully, or would it cause problems with syphoning? Each waste would have its own trap. Water softener has a washing macine type waste with trap. Total run is about 2 metres and it is a single stack waste system. Thanks everyone. |
#2
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Advisable to combine bathroom wastes?
Liam wrote:
Redoing ground floor bathroom. At present I have three seperate waste pipes for water softener, basin and bath all going to a gully outside. Would it be possible to run just one waste pipe with two branches joining it to the gully, or would it cause problems with syphoning? Each waste would have its own trap. Water softener has a washing macine type waste with trap. Total run is about 2 metres and it is a single stack waste system. I'd go for it. I can't see a 2m length causing syphoning problems, but in the unlikely event that it did, you could easily add in an air-admittance valve without messing up all the pipework. (And use 1.5" pipe rather than 1.25", obviously.) David |
#3
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Advisable to combine bathroom wastes?
Liam Wrote: Redoing ground floor bathroom. At present I have three seperate waste pipes for water softener, basin and bath all going to a gully outside. Would it be possible to run just one waste pipe with two branches joining it to the gully, or would it cause problems with syphoning? Each waste would have its own trap. Water softener has a washing macine type waste with trap. Total run is about 2 metres and it is a single stack waste system. Thanks everyone. Combining the wastes is fine but you should increase the size of the main waste pipe to 2" to allow for the additional branches. -- Nick H |
#4
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Advisable to combine bathroom wastes?
Liam wrote:
Redoing ground floor bathroom. At present I have three seperate waste pipes for water softener, basin and bath all going to a gully outside. Would it be possible to run just one waste pipe with two branches joining it to the gully, or would it cause problems with syphoning? Each waste would have its own trap. Water softener has a washing macine type waste with trap. Total run is about 2 metres and it is a single stack waste system. Thanks everyone. Also do not make the 'falls' too steep. 2.5 degrees is correct. Too steep a fall will cause the water to travel too fast down the pipe and will draw air behind it. Also make all traps 3" deep seal traps, (anti syphon will help). |
#5
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Advisable to combine bathroom wastes?
"Bookworm" wrote in news:1146397578.551526.225500
@u72g2000cwu.googlegroups.com: Liam wrote: Redoing ground floor bathroom. At present I have three seperate waste pipes for water softener, basin and bath all going to a gully outside. Would it be possible to run just one waste pipe with two branches joining it to the gully, or would it cause problems with syphoning? Each waste would have its own trap. Water softener has a washing macine type waste with trap. Total run is about 2 metres and it is a single stack waste system. Thanks everyone. Also do not make the 'falls' too steep. 2.5 degrees is correct. Too steep a fall will cause the water to travel too fast down the pipe and will draw air behind it. Also make all traps 3" deep seal traps, (anti syphon will help). Consider HepVO - excellent waste vales. -- Rod |
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