Originally posted by: mostly_harmless
I have recently read about the MagnaClean filter which uses a magnet to collect loose metal circulating around the central heating system. I believe there may be similar products from other manufacturers. Does anyone have any experience of these ? Roughly how much would a plumber chrage to install one of these ?
There are as you say, many versions of these from different suppliers, although the 'Adey' Magnaclean was the first. (Designed by Chris Adey - a heating engineer to solve a problem)
Essentially, the water in the heating system passes through the unit and around the rare earth magnet in the centre which is encased in a resin sleeve. All magnetic contaminants, get attracted to the magnet as the system water passes.
Periodically, the unit can be isolated and the contaminants flushed out or off the core by sliding the magnet out of the sleeve (removing the magnetic influence). This is done every boiler service but is very easy for the consumer to do also. It does give a very good visual proof of the sludge being removed to the client. "Better out than in" - I always say.
Cost of units are around £100, and fitting will depend on having a suitable section of pipe on which to fit it, allowing for access to clean out, and how much draining of the system is required to fit it.
They also provide an excellent point for treating and dosing the system with cleaners and corrosion inhibitors.
Hope that helps,