Washing machine anti syphon valve

greencarman · Last edited by greencarman on Wed Dec 06, 2006 10:26 am, edited 1 time in total

Can any one tell me if i need anti syfine units for both my dishwasher and washing machine or just washing machine when plumbing both waists into an airtight tap waist pipe.

JohnD · Posted: Wed Dec 06, 2006 10:09 am Post Subject:

They should both be put loosely into standing pipes with traps (an alternative is to attach them to a sink trap but this is not as good).

greencarman · Posted: Wed Dec 06, 2006 10:24 am Post Subject:

but do i need anti syphone valves on both appliance waists

JohnD · Posted: Wed Dec 06, 2006 11:14 am Post Subject:

If you use the standing pipe arrangement, the waste hose fits in loosely and does not make an air-tight seal, so syphoning does not occur and you do not need an anti-syphon valve.