"Nigel" wrote in message
...
The mid position valve which controls the flow of hot water to the tank
and
the central heating needs replacing.

I've changed a couple of control heads but they break after a few months.

When I tried manually moving the axle on the valve, it's very stiff and my
guess is this is causing the motor in the power head to burn out.

Anyway, I'm pretty competent with most DIY but I haven't done much
plumbing
(fitted a shower, taken raditors off for painting, fitted a sink).

Is replacing the tri-valve something that relatively easy to do. The
valve
is easily accessible, but I'm nit sure what the process is and what parts
of
the system need to be drained.

Any opinions, advice, pointers to helpful sites would be most welcome.

Cheers,

Nigel



If its seen its day Nigel, then best replace it. Don't think of draining
just parts of the system, to be safe, drain the lot, it also gives you a
chance to top up any inhibitor fluids and things at the same time, winters
not that far away.

If you can get to it easily enough, then it ain't no big job. Just make
sure when you put the new one in that you tighten all the nuts evenly around
the valve to avoid kinking any of the pipework, and support the whole valve
with a proper wrench while doing it.

It's also a good idea to take the head off while you're fitting the valve so
you'll be used to that bit.

Good luck with it.


---
BigWallop

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