Very slow basin

[Polyhive]

This basin is located in a guest bedroom and the pipework goes right across two rooms to tee into pipework from a shower and basin in the room adjacent R4. The shower and basin work fine, no issues, but the basin in room 5 is extremely slow. I dosed it with three litres of Wickes organic pipe cleaner but it has made no odds.

There is no scope that I can see to re-route the pipe work so what can I use to clean it out and improve the flow rate?

Thoughts please?

PH

 

[herbert]

You have no choice than to take it apart starting by cleaning the trap under the basin

 

[Howsie]

Did it have the correct fall as outlined in the building regulations?

 

[Polyhive]

Yes the trap is empty first thing I checked. As for the fall....LOL I strongly suspect that building regs were never consulted. This is an old building. I am asking how to clean out the pipework without dismantling two sets of floors and carpets and taking two rooms off line whilst that is done.

PH

 

[shneld]

you could remove the trap and try getting a wet vac on it to suck any blockage out.

 

[Howsie]

If it isn't the trap then its likely the poor plumbing has resulted in the pipes not self cleaning and now you have a build up of crap on the run. A few doses of pipe cleaner may be your only option.