The Medway Handyman wrote:

tonyjeffs wrote:
My technique is rubbish.
Assemble - fit - test - mop up the mess
Reassemble - fit -test - mop upthe mess
Repeat until luck improves.

Heh. Sounds all too familiar.

Close coupled WC's leak in one of two places. The joint between the
syphon and the cisterm or the joint between the cistern & the bowl.

Sometimes, depending on how daft the designers are, they also leak from
the holes for the bolts fixing the cistern to the bowl.

Fit the syphon to the cistern with a liberal application of LSX.
Ignore any idiot instructions such as 'sealant is not necessary'. It
is.

Very often, it is not necessary. However, you only find out whether it
was or wasn't after the assemble/fit/mop process ...

Fix the bowl to the floor, but don't tighten up the fixings holding
the cistern to the wall untill you have done up the nuts & washers
holding cistern to bowl. If leak persists, remove cistern & apply
liberal amount of Plumbers Mait around donut washer.

Or, if you're not too fussed about ease of disassembly, silicone or
CT1.

I put a smear of silicone around the nuts and washers thinking it
might help. Perhaps i shouldn't.
Could anyone give me pedantic step by step instructions please?

And ditto the small sink waste. Can't do it first time. Plughole,
waste/connection to trap. ***** slight drip from that too :-(

LSX is your friend. But bear in mind waste systems need to be
perfectly lined up to seal.

And also bear in mind that LSX skins over and won't stick if there's
even a hint of water on the surface. CT1 (http://www.ctecuk.co.uk/) has
entirely replaced LSX in my affections. It's a bugger to track down a
supplier though.

Plumbing aparatus is by & large designed by morons IME.

They really ought to be made to assemble and fit their designs in half
a dozen real-world installations before the products are sold. Same
with light fittings.

--
John