Blocked cold water feed to C/H system

10 Dec 2008
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United Kingdom
The cold water feed to my open vent C/H system was partially blocked, but I managed to free it by pushing air through from the tank in the attic. Checking with a magnet I find that there is considerable sludge build up in the 22mm pipe that connects the T from the cold water feed to the C/H pump. I have been advised that this section of 22mm pipe should be cut out and replaced. Could I replace this pipe (i.e. from the T junction to the pump) with a flexible compression connection, or is there some reason why flexible connections should not be used so close to the pump? This would make future cleaning of sludge much easier.
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Why not give the system a good chemical clean and fit a magnetic filter to get rid of the sludge rather than trying to bodge a workaround for removing sludge over and over again.

Eventually the sludge will kill your pump and/or boiler so a fix not would be much more economical.
Thanks for this. I have just added the cleaner, and will also fit a magnetic filter after it is flushed out tomorrow. Will then add Furnox MB1 or equivalent. Hopefully this will cure the problem.

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