CC WC leaking from cistern

L_Plate · 28 Nov 2006

I have tried repeatedly to secure a new close coupled WC, but am continually getting a leak which runs down each the screws that hold the cistern to the WC. They are the type that have a tapered rubber washer held in place by a steel washer, with steel butterfly nuts at the base. I have tightened these as much as think I should. Anyone have any tips, please?

Bahco · 28 Nov 2006

I cured this by changing the steel washers to larger ones which spread the load more and enabled more tightening of the wing nuts.

L_Plate · 28 Nov 2006

Nice idea, Bahco. I'll try the bigger washers. Thanks.

L_Plate · 3 Dec 2006

Have replaced the original washers for larger ones and have tightened the wing nuts as much as I dare but I am still getting a small leak either side. This is driving me insane. Any further advice , Bahco, or anyone?

Bahco · 3 Dec 2006

If it is still leaking fron the tapered rubbers , drain and remove and apply some silicone around the 2 holes. Let it cure and reassemble and test.

Check that the leak is not coming from the joint where the pan meets the cistern/ If so you will need to replace the donut washer.

Persevere.

L_Plate · 3 Dec 2006

Bahco said:
If it is still leaking fron the tapered rubbers , drain and remove and apply some silicone around the 2 holes. Let it cure and reassemble and test.

Check that the leak is not coming from the joint where the pan meets the cistern/ If so you will need to replace the donut washer.

Persevere.

No, it seems pretty dry at the joint; it's just on the washers (now large) and tapered plugs where the seepage occurrs. I'll give it some 785. Thanks again, Bahco.

dan the man · 3 Dec 2006

yup silicone everytime on these.

Softus · 4 Dec 2006

I'm with dan on this one - put the screw through the hole and then 785 from underneath to fill the void around the screw thread, then the washer and the nut.

L_Plate · 4 Dec 2006

Thanks very much for your help, chaps.

ChrisR · 4 Dec 2006

Those washers in the cistern have to be stainless, or they'll be a rusty mess soon.

tidypool · 19 Oct 2014

just want to know can you buy these tapered rubber washers on their own. as I need to replace the two in my my cistern .

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CC WC leaking from cistern

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