New Boiler . .fair quote?

George_Bray

CG

Yes, I found either that web page or one very similar and became interested.

>I doubt this (or your own fabricated one ) will
>work on gravity. The only way to improve heat
>up time will be to add a pump.

Many thanks for this. I was thinking of adding a pump anyway and, from what you say, it sounds like it may be essential.

Regards
George

plumb1_2

George_Bray wrote: »

CG

Yes, I found either that web page or one very similar and got the idea of multiple thin pipes for the indirect coil. Their cylinders are very expensive, hence my DIY approach.

>I doubt this (or your own fabricated one ) will
>work on gravity. The only way to improve heat
>up time will be to add a pump.

Many thanks for this. I was thinking of adding a pump anyway and, from what you say, it sounds like it may be essential.



Regards
George

You will have to install a pump, as these type of cylinders(or the type you intend to fabricate) will NOT work on gravity systems.
Also you will have to link it to a time swich/programer, cylinder stat, and install a bypass(good pratice).

George_Bray

Plumb1

Many thanks for your latest help.

>these type of cylinders(or the type you intend to
>fabricate) will NOT work on gravity systems.

I'll take your word for it but I'm surprised because the internal area of 3,4 or 5 runs of 8mm pipe (or whatever they use) must allow at least as much flow as a single 28mm pipe. I haven't sat down and worked it out with maths but that's what I'd expect. So I wonder why it won't allow circulation with gravity alone.

Regards
George

EliteHeat

Let us know how you got on with this.

jomknight

New boiler - I've been quoted £2500 plus Vat for supply and fitting of a replacement boiler-- Glowworm 18sx. Also draining and de sludge old system. Is this reasonable for Dorset- have waited 12 months for a plumber to come up with a quote. Also for thickie here-- how do i post new thread? - Cannot see any instrucions