Hi All,
My bathroom has a washbasin and bath. The basin is a half-pedestal one with a standard U bend trap, which goes out of the wall in 32mm.
Outside, the 32mm pipe has an elbox, then proceeds diagonally down to the bath waste exist, which is a 40mm tee - one side has a 32->40 adaptor. the centre of the Tee conencts to the bath trap, and the other side of the tee proceeds along the wall for another metre before it ends above a hopper.
The problem is that when you empty the bath, it sucks the water out of the basin trap and it makes a lot of noise!
what is the proper solution to this? I understand I could fit an anti-syphon trap to the basin, but is there a better solution? the anti-syphon trap seems to me like it's a bodge to fix a fundamentally flawed installaition, so how should it have been set up?
thanks
slip
My bathroom has a washbasin and bath. The basin is a half-pedestal one with a standard U bend trap, which goes out of the wall in 32mm.
Outside, the 32mm pipe has an elbox, then proceeds diagonally down to the bath waste exist, which is a 40mm tee - one side has a 32->40 adaptor. the centre of the Tee conencts to the bath trap, and the other side of the tee proceeds along the wall for another metre before it ends above a hopper.
The problem is that when you empty the bath, it sucks the water out of the basin trap and it makes a lot of noise!
what is the proper solution to this? I understand I could fit an anti-syphon trap to the basin, but is there a better solution? the anti-syphon trap seems to me like it's a bodge to fix a fundamentally flawed installaition, so how should it have been set up?
thanks
slip