What should i use to fill a non-plumbed towel rail.
I realised that nearly all plumbed in towel rails can have a electric heater
element fitted inside, this is so the towel rail can be used when the
central heating is not being used (summer). What i was going to do because
to plumb in the towel rail would be too differcult (locacation) was just to
use the electric element on a fused switch when required, the thing is i'm
not sure what to fill the rail with, normal water, distilled or something
Is this idea possible, has anyone else done this?
One possible snag with your plan is that there is no provision to
cope with expansion of the fluid, unless you leave a deliberate
air space, which would mean that the top of the radiator would be
cold. Not sure how it would be for corrosion either.
Chris J Dixon Nottingham UK
How much expansion do you expect from a two hundred watt heater in a towel
radiator? The pressure in a combi central heating system may rise up to 3
bar when hot and most rads will take much more before leaking. I have seen
plumbers presure test up to 5 bar when they commissioning systems. As for
corrosion then use central heating inhibitor in the radiator as I pointed
out on the OPs first post asking the same question.
You could just leave the bleed nipple open, like a tiny
vented system, although you'll have to change the inhibitor
every few years (just like a vented system too).
Central heating inhibitor with antifreeze is available,
if you think there's a risk of freezing, e.g. Sentinel X500
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