Aniseed wrote:
Cuprager wrote:
Aniseed wrote:
Dear DIY experts,

I currently have an in-line scale inhibitor on a pipe running into
a
Worcester Heatslave 9-24 combi boiler. It was installed by the
house
builder 15 years ago. The scale inhibitor is also made by
Worcester. It
does not seem to have been topped up with crystals regularly. The
scale
inhibitor is a heavy copper capsule with a cap at the top which
you are
supposed to unscrew to top up with polyphosphate crystals. But it
is
jammed tight. I have tried removing the unit, and tried my best to
unscrew the cap using an adjustable spanner, but i couldn't budge
the
thing. I tried heating up the cap end of the caspule over a gas
hob,
then cooling it in water, but it didn't help. Tapping the cap with
a
hammer also no good.

SNIP


Hmm, I've never thought of replacing the boiler just due to old age.
Unless it
developed some problem, I guess I wouldn't bother. Unfortunately I am
not
experienced with DIY in general, let alone home heating, so I can't
give advice
on this. Ask me about computers if you want solid advice

-aniseed

How about binning this in-line scale inhibitor and replacing it with a
phosphate dosing unit, (Combi-mate or equivalent) cost about =A330 from
B&Q etc, which take replacement cartridges every year costing ~=A315.
Just twist out the old cartridge and twist in the new.

Installation is two compression joints, so shouldn't be too tricky. Of
course it might involve some reorganisaton of your existing pipework,
but you sound like you'll be fine with that if you've already taken out
the existing unit.

(However whether these work or not is a different matter! I have one of
these on the inlet to my Megaflow - don't know what sort of state the
coil heat exchanger is in but it certainly doesn't stop limescale
forming around all my hot taps!)

Luke