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plumber help

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Range Rover Blues:
Yes that sounds right, a combi boiler works under pressure, although strictly speaking the cold waterconection should be left diconnected or the tap handle removed, something about water bylaws :roll:

Anyway, the boiler will malfunction if you don't have enough pressure in it.  It may also be full of treated water, be careful.

waveydavey:
In theory the filling loop should be disconnected and the ends capped when not in use, this is so that it the mains water pressure fails the pressurised system cannot contaminate the mains supply. In reality nobody ever does, there are two valves there anyway.

If you are ona  combi the full flush is easy; open the drain, put a hose on to outside if you need to then open the filling line. Try and balance the drain so that with teh fill full open you have enough to run the boiler and hence the pump, do that for a while until the drain clears.

The easiest way to retreat teh system is to get a single dose that you squirt into one on the rads through the bleeding hole, done with a mastic gun.

strapping young lad:
erm... the drain if im right is the lowest point of the system (water likes gravity i think :) and put in a hosepipe into that then open it?

what ive done before is once thats going, to open the bleed valves on all other rads to ensure the water has equal air pressure to make it go out quicker (in the meantime ive switched off the boiler.)

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