Bottle Trap Being Pulled

[self builder 123]

Hi

I have a metal bottle trap being pulled when the WC is flushed.

I am trying to fit an in line anti syphon fitting, but the wife would rather I didn't as it would be visible.

If I were to entend the plastic tube which is inside the trap would this help the trap from being pulled or would it just help to ensure that there was sufficient water left in the trap so as to avoid smells ?

Cheers and a Happy New Year

 

[SandyLyon]

I take it the metal Bottle Trap is on view and you don't want to change it.

Does the Bottle trap have a 75mm seal ?
Is the waste pipe 32mm dia and does it have a fall on the horz run ?
Is anything else connected into the same waste run ?
Where does the waste pipe connect to the soil pipe in relation to the WC connection. Often poor design / installation can cause problems.

Fitting a HepVo valve in place of the Bottle Trap would solve the problem but not the cause, but if it's exposed you wife may not be happy