Gravity H/W Noise

[awtltd]

I have an annoying problem with my GHW system.

When the boiler first fires it appears that the water is heated then it boils for a short time (maybe 30 sec max) before it starts to naturally circulate.

If I turn the water off, then the boiler shuts down as it should.

If I then turn the water on again, the boiler then re starts and the water is heated without the boiling noises.

Any Ideas how I can get the water circulating before the boiler fires as I think this would cure the problem.

I'm going to see if it is possible to start the pumped CH for a couple of minutes before the GHW starts to see if this does the trick.

I've already descaled the system, flushed and treated with Fernox noise reducer and protector (maybe I should add more?).

Any Ideas gladly considered although I don't really want to change to pumped HW

Kev

[Dave Plowman (News)]

But you really should consider doing this. As well as working better it will save you money in the long run.

[awtltd]

How easy are the mods? Is it just a matter of plumbing a pump into the gravity water circuit and wiring in to the 2 port valve?

Kev

Dave Plowman (News) wrote: