Mine is, but the real issue last time was the scale build up in the valve
causing it to not close correctly and leak.
Brian

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The Sofa of Brian Gaff...

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"Graeme" wrote in message
...

Our cold water tank has started overflowing, so this morning, up in the
loft, water off, partially drained cold tank, removed end cap from valve,
removed split pin, wiggled the float arm out and removed the slider thingy
which has a rubber washer in the end. The washer looks to be extremely
worn, but how do I get it out of the slider? More to the point, how do I
get a new one in? Once out, is it just a rubber disc?

Thanks.
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Graeme