Waste compression joint leaking

[flyingsparks]

I have fitted a washing machine trap to a new 40mm wsaste pipe but its leaking around the compression joint. Have I done something wrong, its pushed right into the joint and tightened fully . The rubber seal is in there too.. is it a naff fitting or have i done something wrong?!

 

[JohnD]

is it the same brand as the pipe and the correct size? did you use silicone grease so the rubber washer can slide easily?

tighten the nut some more.

 

[flyingsparks]

It was all from screwfix not sure on the make. If anything the pipe was 41mm slightly bigger. no i didnt use any silicon grease, should i have? I think the nut is fully tight now!

 

[moggridgeplumbing]

Check the rubber seal has not twisted. If you overtighten it it can buckle and leave a leak, and also check it has been put in the correct way. One side will have a chamfered edge to go into the socket side..

 

[JohnD]

good point. If the rubbers have been deformed they will usually not seal properly in future, you'll need new ones.

 

[stardanny]

did you use silicone grease so the rubber washer can slide easily?

I find Fairy washing up liquid fair easy.

 

[JohnD]

I used to, but all the plumbers ganged up on me and said it makes the seals perish and stick