slotted basin waste leaks at lock nut

[geoff01]

Hello All,
I am renovating my bathroom and apart from every other thing that made life difficult I have a leaking back nut on the basin waste. It is a slotted type but the problem seems to be the lock/backing nut doesnt have thread all the way round. It has a 5mm groove at each side with the thread smoothed out. When the overflow fills it leaks out of these grooves.It looks like a faulty nut but this may be normal.
I hope I have explained it enough and someone can offer some advice.

Many Thanks
Geoff

 

[turnpin]

Hi geoff and welcome I would suggest changing it for a McALPINE BSW1PC from any good plumbers merchants no paste or sealant required just a slotted screwdriver and best of all no backnut good luck regards turnpin

 

[justlead1]

Hi Geoff, Basin slotted wastes are a pain. Having had the same problem many times (On a range of basins where the painter has made a nice job, leak and i wreck his work re bedding the waste) my solution was to have white gloss in a fairy bottle and squirt a bit down the overflow, whilst watching down the waste for it to appear at the slots (not to much) The thick nature of paint seals the waste nut seal with the basin. But must be left as long as possible to set before testing the work, over night as a minimum. Good Luck

 

[geoff01]

are the slots in the back nut supposed to mbe their and if so what are their purpose

 

[justlead1]

Never come across them.

 

[charliejamesuk]

A 'Basin Mate' from B&Q for a couple of quid will also do the trick.

 

[ihatediy]

A 'Basin Mate' from B&Q for a couple of quid will also do the trick.

I have just spent the last two weeks and have had about twenty attempts to stop the waste leaking from my bathroom basin. Whilst I hate DIY of any description I have never considered myself bad at it, although this was very very testing. I spoke to several DIY enthusiasts, a plumber and a general maintenance man, and non of their tips worked. I even sealed the slots in the waste pipe, and for some reason that I still don't understand the water still managed to escape from the base of the fitting. I hunted the internet and found such a thing as a basin mate existed. A cone shaped rubber washer with a plastic cover and a felt washer for the top of the fixture. The first attempt nearly worked and the second attempt did. The problem is when I had to lift the sink slightly to get the pedestal back in it started to leak again. Fortunately this settled down and I have now been leak free for about two hours. This made me so joyous I had to register and tell you all about it. I bought this item for just over £1 from Tool Station.

 

[AWheating]

im with turnpin, use either the macalpine waste or waste trap combo. you can even change them without touching the ped, cant get any more easy then that.

 

[stevetheplumber]

plumbers mait and poly washers

 

[Deleted member 7121]

clear sealant and poly washer, bin the plastic nut and use brass one

 

[Nat]

Hold the waste in position, squeeze silicone around the gap between the waste and the basin using a mastic gun, wind the backnut on (don't worry about the washer) hand tight and give it a little nip with your grips.

NEVER had a leak using this method in easily 100 plus times I've done it.

 

[SimonG]

Hold the waste in position, squeeze silicone around the gap between the waste and the basin using a mastic gun, wind the backnut on (don't worry about the washer) hand tight and give it a little nip with your grips.

NEVER had a leak using this method in easily 100 plus times I've done it.

Ditto.

 

[unguided1]

I use plumbers mate and poly washers and no problems, If I cant find any poly washers on the van then I will make a lead washer, again no problems

 

[TC.]

im with Nat on this one, silicone sealant all the way and lots of it - on the 300 plus basins i have fitted at work i have never ever had a leak on any of them!