Waste trap siphoning

[lambo75uk]

We're having problems with gurgling drains in the bathroom in the house we've just moved into. When I look down the plug hole in the sink I can see the water bubbling round the trap until pretty much all the water is gone. This happens when nothing else is being used so I guess it's not being siphoned by a vaccuum from other wastes, it happens even if the tap is run very slowly so that water isn't "rushing" round the trap and i can't detect any hint of a leak. When the bath water is released we get period "gasps" as I guess trapped air finds its way out. Fortunately we aren't getting bad smells in the house so it's more of an annoyance than a major problem but I can't work out why it's happening.

Any advice you might have would be gratefully recieved.

 

[taydo]

it ussually has something to do with the position of your soil stack and lengh of run to it.

there is a trap you can buy that has a one way vent on it this may cure your problem.

 

[masona]

See this, you might need to change your waste trap to Anti Vac Bottle Trap.