I thought you fill the back boiler in a woodburner with sand so that it can be emptied and used as a water boiler later on, otherwise the tank will burst.

Might be wrong.

george


On Wednesday, February 17, 2021 at 11:41:28 AM UTC, Chris B wrote:
On 17/02/2021 10:00, Martin Brown wrote:
On 16/02/2021 20:44, AJH wrote:
On 16/02/2021 20:35, Chris B wrote:


My question to the group, if you drain all the water out of a back
boiler system, does that preclude using the open fire? IE will you
melt/damage/distort the fireplace/boiler?

IIRC people would fill the back boiler with dry sand and the top vent
left open and carry on burning.worse case then would be sand spilling
into the fire as the steel oxidised.

That was what the guy who looked at ours wanted to do. You need
something behind it to take way some of the heat. The metal on its own
would heat up too quickly. It will run a lot hotter with dry sand in but
nowhere near as hot as a thin sheet of metal with air behind it would.

Thanks all for the comments (particularly the references to the
explosion and HSE advice) I will be sure to pass it on. It looks like
its not just them but any future house owners who need to be considered.

--
Chris B (News)