"Andy Dingley" wrote in message
...
On 4 June, 08:45, "Doctor Drivel" wrote:
"Andy Dingley" wrote in message

Has anyone opened up a Magna booster and found this pile of mythical
sludge?

It is not mythical, it collects magentite on the magnet. The Magna Boost
is
the best, catching magnetic "sludge" and other solids. It is easy to
remove
the sludge, in the annual service.

If you're de-sludging annually, your inhibition needs looking at!


You are right. But it will catch the stuff if the inhibitor breaks down or
neglected. It also catches solids on commissioning.

Many installers use them on boiler changes to avoid the expensive poweflush.
They flush through with fresh water, and run the pump, then after 1/2 hour
empty, and then another 1/2 hour. They do this as they say do the electric
and tidy up, some plastering or whatever. Many put two does of X-100 in it
and of he homeowner is competent enough tell them to empty it every moth
until clean and top up to 1 bar. They hate call-backs.

Does an inhibited system generate enough
sludge to warrant a magnetic trap?

I theory no. In practice yes. Few are redosed at the correct time. On
boiler changes, which is most of the work these days, they are essential to
catch the sludge hanging about. A power flush never gets it all out.

Is the Magna booster a reasonable trap?
(seems likely enough, although
massively over-priced) Is BG installation
fee reasonable? (seems
equally massive, IMHO).

The unit is made by Spirovent who make industrial units as well. They make
quality products. £250, when unit costs say £110 is fine for a drain down
and refill. That is £140 for the work which can take some time depending on
the system. And you may find they put new X-100 in as well.