Hi, I have a leaking valve in an upstairs room, on a combi boiler system.
Is there a way of replacing the valve without draining the whole system ? And is draining a combi system the same as for a conventional one?
[quote="Steve the gas"]If it's leaking from the nut/olive connection to
Hi Steve, It`s a leak from just below the projecting bit that turns when you screw the cap. There are two hexagonal nuts below this and the water seems to come from the top one. Should I tighten the lower one and then the top one to see if this cures it ? Or maybe lock the top one against the bottom one (2 spanner job) ?.......Thanks for help so far.
If you have the manual follow it.
If not,isolate boiler from power and water, find a suitable drain cock (lowest point), attach hose to outside,open drain cock.FIT NEW VALVE.
After draining,close drain cock, open filling loop , while another body bleeds rads, keep refilling up to 1 - 1.4 bar. Voila!
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