Can anyone help with a problem concerning a new basin which doesn't drain? I remove my old basin from the bathroom (a wall mounted basin which drained o.k. except for the occasional blockage due to hair/sludge etc)) and replaced it with a basin which sits on a wooden vanity unit. The new basin has a pop-up waste unit and I connected it to the old 32mm pipework. Due to the new basin waste outlet being about 40mm higher than the old I have had to use a number of 90 degree bends to get the pipework to connect up (I couldn't use a telescopic trap as the shelf in the vanity unit would have been hard up against the trap). When I turn on the taps without the pop-up waste in place, the basin slowly fills up, if the basin has about 75mm of water in it, it takes about 3 minutes to drain away. So I have tried the following:
1. I removed all of the pipework, extended the waste connection to the outside of the unit and put on a bend, then I used a funnel and poured water into the waste pipe, it flowed away without any problem (so no blockage).
2. I installed the trap (a shallow bottle type) and with a bowl under the outlet I turned on the taps, the water flowed straight out of the basin without any problem.
3. After reading the forum I installed an anti-vac valve to the outlet of the trap, after connecting up the pipework and turning on the water, the basin starting filling up again and then water came out of the anti-vac valve! I tried another valve in case this one was faulty, same problem.
4. I changed the bottle trap for a p trap, same problem.
5. I installed a tee piece into the pipework at the wall, then I connected the basin to one branch of the tee and then extended the other branch with some pipework as high as I could within the vanity unit to try and allow some air into the waste pipe, turning the taps on resulted in the basin filling up and the temporary pipe filling up and overflowing.
7. I have tried everything I can and am now asking for some help, please .......... (sorry for the long post but I wanted to describe everything I have tried)
1. I removed all of the pipework, extended the waste connection to the outside of the unit and put on a bend, then I used a funnel and poured water into the waste pipe, it flowed away without any problem (so no blockage).
2. I installed the trap (a shallow bottle type) and with a bowl under the outlet I turned on the taps, the water flowed straight out of the basin without any problem.
3. After reading the forum I installed an anti-vac valve to the outlet of the trap, after connecting up the pipework and turning on the water, the basin starting filling up again and then water came out of the anti-vac valve! I tried another valve in case this one was faulty, same problem.
4. I changed the bottle trap for a p trap, same problem.
5. I installed a tee piece into the pipework at the wall, then I connected the basin to one branch of the tee and then extended the other branch with some pipework as high as I could within the vanity unit to try and allow some air into the waste pipe, turning the taps on resulted in the basin filling up and the temporary pipe filling up and overflowing.
7. I have tried everything I can and am now asking for some help, please .......... (sorry for the long post but I wanted to describe everything I have tried)