Re: Smelly drains / no venting?
Posted by hj on May 27, 19100 at 10:42:20:
In response to Re: Smelly drains / no venting?
The term for the device you are looking for is Air Admittance Valve. It allows air in to break a siphon, but keeps the odors from entering the room. If a sewer backs up, a fixture without a vent can get air bound and not drain. The AAV will also have this problem.

: This might seem a bit weird to most people reading this, but drain vents don's seem to be used where I live (Spain). As you might expect, this seems to create a siphon effect in the drains - I think the water is sometimes being sucked out of the traps. Is there something like an anti-siphon valve that can be added neer the traps most affected?

: The problem seems to be most pronounced around the toilet and especially after taking a shower.

: Thanks much,

: Greg.

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