Sink drain problem

[chris_hesketh31]

Hi

My bathroom sink, continually takes ages to drain out, more apparant when I try to fill with hot water, as I have a combi boiler, and when the water has got hot and got to the sink, the sink is almost full!! It appears that it is actually a plastic cloakroom sink, fitted before I bought the house. Underneath, the plastic drain fits onto what appears to be a lead outflow pipe. Is it possible to replace all the waste piping with plastic, when I fit a proper bathroom sink, or is there another solution to the slow draining.
Any advice

Rgrds

Chris

 

[IanDB]

It could blocked? Have you tried either undoing the trap (if it has one) or using drain cleaner?

Failing that there is no problem with replacing it with plastic.