Fitting basin wastes- weeping

[opps]

I recently had to replace a (slotted) click clack basin waste.

It had a plastic back nut and thin rubber washer for the underside. Previously, each I have purchased, had an additional conical foam washer to prevent the water from running down the thread.

I bedded down the upper chrome part with CT1 and tightened the underside washer and nut. The water leaked down. I decided to smear ct1 around the nut and washer. The next day, I noticed that a small amount of water was running through the chrome thread. I used CT1 on the underside of the thread and all is now good.

How on earth could that waste ever be water tight without having to bodge it with CT1?

 

[johnny2007]

Basin mate.

Basin Mate

Say goodbye to leaks for good with this basin waste seal kit from Epson. It functions with your current waste system. so you can use it to create an efficient seal and avoid drips or leaking on either newly fitted basins and sinks or existing ones.This Basin Mate kit is made from high-quality...

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[Madrab]

Would never use CT1 for that type of job, don't get me wrong CT1/OB1 etc are very good silicone construction adhesives but it's is more suited as an adhesive that seals rather than an actual silicone sealant. Given the way it sets it can then be a nightmare if the waste ever needs to be dismantled and replaced in the future

A good quality silicone is just as effective but allows the disassembly to be much much easier.

As suggested though a basin mate is also very effective.

 

[opps]

Would never use CT1 for that type of job, don't get me wrong CT1/OB1 etc are very good silicone construction adhesives but it's is more suited as an adhesive that seals rather than an actual silicone sealant. Given the way it sets it can then be a nightmare if the waste ever needs to be dismantled and replaced in the future

A good quality silicone is just as effective but allows the disassembly to be much much easier.

As suggested though a basin mate is also very effective.

Thanks for the reply.

My point was more a case of how could the fitting ever be watertight without the use of silicone or CT1.

If tightened sufficiently, yeah, the back nut "should" make the underside union watertight, but there would always be water running through the slotted section when emptying the basin, and ultimately running down the threaded chrome section.

I don't see why a fitting from a plumber's merchant should need a retrofit solution. In any case, there would not have been enough space to fit the basin mate because of the height of the vanity unit shelf.

 

[Madrab]

Yep - it's always been the case, for as long as I've been doing this, that basin waste's, especially slotted, always needed more than what was supplied by the manufacturers.

 

[opps]

Yep - it's always been the case, for as long as I've been doing this, that basin waste's, especially slotted, always needed more than what was supplied by the manufacturers.

Tnx.

I have previously fitted the ones with a cone washer that pushes up, and they were fine. No evidence of water running down the thread.

So would you automatically use something like LSX?

 

[ajrtd]

I tried the basin master a few times but have gone back to using plumbers mait. its a little messy but very reliable.

 

[Madrab]

Silicone all day long, just enough in the gap around the shank of the waste so it won't foul the overflow and then coat the threads to the level of where the nut will be, add the washer and then fit the nut and tighten, any excess squeezed out by the nut/washer gets put around the nut at the threads just to seal that section up then wet test. If it's dry then all done, never had a call back.

Personally I hate it when I come across mate and the previous fitter gets a mouthful , it's the nastiest stickiest stuff ever invented and gets everywhere and a mare to clean off but each to their own.