Drainage

[Drewdee]

I have replaced the en-suit and all is well, except the drainage from the sink. It is quite a long way

I used the existing 32mm drainage, when the sink is filled, the water drains away very very slowly and when empty glugs for ages. Almost as if the pipe is blocked

I guess that it is something to do with an air lock. So i but a T coupling into the pipe and blanked off the third opening. Maninly to see what was going on!

When the sink is filled, and the blank is unscrewed, allowing air to the drainage pipe, the water drains away, until the water fills the pipe up to the T coupling, then it slows down and comes out of the loosed blank, and I am back to slow drainage

Any ideas!

Thanks

 

[Bahco]

Use an anti vac trap which allows air in to help drainage.