Query on Flushing Central Heating

Postby GDS » Fri Jan 04, 2008 10:33 pm


Would a Central Heating System need to be power flushed after a radiator was replaced with a Towel Radiator?

Or would I be able to get away with flushing a cleanser through the system and then add an inbitor to the system?

Pressurised Combi Boiler system all on one floor

Many Thanks for you help

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Simply Build It

Postby marrtin » Sat Jan 05, 2008 12:32 am

Flushing is really only required if the system is very dirty or filled with sludge so if the water was reasonably clear then just refill with an inhibitor.
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Postby DONFRAMAC » Sat Jan 05, 2008 2:50 am

Use of compression couplings would not need any cleanser, but yorkshires with use of solder and FLUX, does need cleanser, but not for more than 7 days, then fill & drain at least 3 times, until water runs clear from all rads. Drain from all rads., before recharging with reputable inhibitor, top up with water, bleed, run system, bleed again with it shut-down, then all should be well, although balancing the IRV's on the rads., may be needed, to push air out of the lines.
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Postby GDS » Sun Jan 06, 2008 9:56 am


Thanks very much for your advice, this was not something we covered on my course

All the Best

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