IainL
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| posted on 1/12/12 at 08:51 PM |
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Kitchen Plumb Question
I currently have a dishwasher and washing machine using the same waste water P trap, at the top of the trap I have one
twin connector (see link) fitted (picture is upside down) as there is a slot at
the top for air, but the problem is sometimes waste water escapes from the air hole when both appliances drain 
Can I swap the above for one of these
double nozzle connection (see link) (again picture is upside
down) and in the other end put a blank (see link)?
or do I need an air hole?
Can't fit the wastes to the sink as it's to far away
Hope someone out there understands the above
Thanks for your help
Iainl
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mark chandler
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| posted on 1/12/12 at 08:59 PM |
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I,ve never seen an air hole, I have seen these where the sink overflow drops into something that might look like an air hole.
I would just block this up, traps and drains should be sealed.
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big-vee-twin
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| posted on 1/12/12 at 09:21 PM |
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You should always have the drain ventilated and to solve your problem you need and air admittance valve which let's air in and keeps smells and
water inside having a vent will ensure a good water flow
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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stevegough
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| posted on 1/12/12 at 10:03 PM |
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The drain pipes need to be a loose fit (you need an air gap to prevent siphoning, I believe) - I think I would suggest something like simply cutting
the stand pipe and put a second stand pipe branching off, therby having one for each appliance.....
.....which reminds me of an old joke......
.....why do women get married in white?
I'll leave it to the collective to provide the punchline.....
Ok, too slow - so they match the other kitchen appliances.
[Edited on 2/12/12 by stevegough]
Luego Locost C20XE.
Build start: October 6th 2008.
IVA passed Jan 28th 2011.
First drive Feb 10th 2011.
First show: Stoneleigh 1st/2nd May 2011.
'Used up' first engine may 3rd 2011!
Back on the road with 2nd engine may 24th
First PASA mad drive 26/7/11
Sold to Mike in Methyr Tydvil 19/03/14
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JoelP
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| posted on 1/12/12 at 10:34 PM |
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That first link is absolute rubbish! You'd expect it to leak. Assuming it is attached to the top of a normal washing machine trap (ie a u bend
with a tall pipe out of it), and you have a good foot of pipe on it (this allows it some space to back up before it overflows), i would cut it an inch
above the bend, fit a 40mm compression tee (push fit wont fit), and an elbow, so you end up with two vertical pipes. Make these pipes as tall as
possible, ie 2" short of the worktop, then just put one in each.
You dont always need air admittance, it does depend where the pipe is going. A waste pipe flowing into a surface gully, with a 3" water trap,
will not syphon it out. However i know from experience that a 1" trap into a closed sewer does gurgle badly.
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