Leaking pipe feed to toilet cistern

Oct 31, 2004 13 Replies

Hello,



Where the cold water pipe feeds our toilet cistern, there is a small drip of water constantly running down the pipe and causing a wet spot on the floor. Initially we thought it was just condensation, but after watching closely, it is infact a small leak where the metal pipe olive screws onto the plastic fitting on the bottom of the cistern.



I would guess that it's a case of turning off the mains water and disconnecting the joint. Then re-taping with PTFE and fastening back up tight. Is this correct?



Also, do I need to drain the cistern before disconnecting the pipe, and if so, how do I go about that?



Thanks in advance,



Graham


There should be a leverto do this - sometimes on the front or side of the cistern, and sometimes on the top activated by a chain. Depress the lever as far as it will go and then release to empty the cistern.

i wouldnt have thought it'd be a metal olive..it should be a flexable washer. usualy just pinching it up works...if youve tried this you may need a new washer. ptfe isnt usualy used here. pinch it up and see.

Boss white putty may be better alternative to ptfe tape in this situation. Gets to parts of the joint that ptfe tape can miss.

Pete

Just try tightening it a tad but remember plastic isn't that strong.

If that doesn't work wander off to a shed and get a(*) fibre washer for a "tap connector", ie something, red similar to thick cardboard, with an inner/outer edge distance of a couple of mm.

(*) I doubt you'll be able to buy just one, it'll be a packet of 3 for =A32...

No, the only water that should come out is that between the ball valve =

the connection you are breaking. How ever if there is somewhere else for air to get in (open ball valve in loft tank?) all the pipe work above the broken connection will drain out as well. Be prepared for nothing to half a bucket full...

"Peter Stockdale" wrote in news:cm3il0$n79$ snipped-for-privacy@hercules.btinternet.com:

I'm a convert to Fernox LS-X for anything under the sun, from properly installing pipework to fixing the semi-stripped thread on my kithcen tap

mike

Normally these connecters leak due to miss threading metal to plastic,very easy to do.Undo connector and have old towel to hand to dry up excess water,use lsx and ensure you do not mis thread when reassembling connector

What it the format of this Fernox stuff - gooey stuff or what ?

Pete

:) To get the remainder of the water out, syphon it using a short length of plastic tubing (sold at B&Q). The water in the cistern is perfectly clean (unless you have any anti limescale/bleach/whatever tablets sitting in it!), so no worries about accidentally getting a mouthful.

Having gone crazy trying to stop a copper to plastic leak like this I eventually used Fernox sealing compound. It's a small tube of a silicone like stuff which seems to seal anything to anything. Not cheap, though.

Seconded. Marvellous stuff for these odd ball joints. Trouble with copper to plastic at a cistern etc is getting things lined up just right - especially as space is often tight.

Like clear silicone sealant.... *very* like it ;-)

Wonder what the difference is to justify the price? It doesn't smell or feel *exactly* like silicone, though.

It is so long since I last used my tube of it that it seems to have gone solid in the tube! So I don't really recall what the consistency was like... A tad thicker than ordinary silicone perhaps?

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