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by PowerFlushAssoc
Sat Mar 10, 2012 2:28 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Can someone help me solve a problem
Replies: 11
Views: 3462

Re: Can someone help me solve a problem

This is a common problem on open vented systems. You have a hardened sludge build-up in the return pipe to the pump, because this build-up does not move around the magnetic filter you installed will not solve any problems as the sludge / problem is not mobile. The build-up is where the downfeed and ...
by PowerFlushAssoc
Sun Dec 04, 2011 8:59 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Microbore central heating
Replies: 4
Views: 9161

Re: Microbore central heating

It would be better to replace for 15mm pipes, if you have the opportunity. Microbore tend to clock up really quick and it's hard to power flush or clean in any way.
by PowerFlushAssoc
Wed Nov 30, 2011 6:30 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Rads not coming on
Replies: 2
Views: 1815

Re: Rads not coming on

I assume open vented: The hot water flow circuit needs a valve to restrict flow through it. When the hot water circuit comes on and there is no restriction, the water simply goes the easiest way - 80% through the hot water circuit leaving 20% for all rads. The other option is pieces of sludge or deb...
by PowerFlushAssoc
Wed Nov 23, 2011 2:13 am
Forum: Plumbing Forum
Topic: British gas quote £765 for power flush to solve lukewarm
Replies: 5
Views: 6703

Re: British gas quote £765 for power flush to solve lukewarm

Even if you drain the system down and take off, and wash out, all the radiators. The pipes and boiler will still be full of sludge, the heavy and large pieces. So at best, 50% effective at removing loose and mobile sludge and will take just as long to do as a power flush or longer. It will however r...
by PowerFlushAssoc
Sun Nov 20, 2011 8:35 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Potterton Promax SL 15
Replies: 1
Views: 7588

Re: Potterton Promax SL 15

Power flushing a domestic house should not take more than one day. After a power flush the water in the system should look very clean, not always 100% tap water clean but near completely clear. Note that if a power flush was done a while ago, the water can start to get slightly murky quicker than yo...
by PowerFlushAssoc
Sat Nov 19, 2011 5:59 pm
Forum: Plumbing Forum
Topic: British gas quote £765 for power flush to solve lukewarm
Replies: 5
Views: 6703

Re: British gas quote £765 for power flush to solve lukewarm

1) Yes, it does sound like power flushing would be needed. Black water = power flush urgently needed 2) There is no problem with using smaller and cheaper companies; they use the same machines, chemicals and skill than the large ones. Larger companies have higher overheads which they need to pass on...
by PowerFlushAssoc
Sat Nov 19, 2011 12:14 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Changing a single to a double-pipe central heating system
Replies: 2
Views: 4532

Re: Changing a single to a double-pipe central heating syste

Yes change it. When one pipe systems go wrong they go very wrong and a planned replacement is better than changing the system, unplanned, while it's -5 degrees outside.
by PowerFlushAssoc
Sat Nov 19, 2011 12:10 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: Power flushing without boiler/heat
Replies: 3
Views: 2216

Re: Power flushing without boiler/heat

1) The only way to get results with a sludge remover on a cold system is to have it in the system for weeks, before the power flush. Could also double the dose. 2) You could use a strong acid, but it very risky and not recommended. 3) Some power flush machines have a heating element attachment, whic...
by PowerFlushAssoc
Sat Nov 19, 2011 12:01 am
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: PowerFlush
Replies: 8
Views: 2708

Re: PowerFlush

Power flushing is about water quality. You have to take a central heating water sample: 1) Very basic test; judge by color. Black - def. need a power flush Brown - might need a flush Clear like tap water - don't need a flush 2) Advanced; test with TDS and PH meters You will need to test a sample of ...
by PowerFlushAssoc
Fri Nov 18, 2011 11:45 pm
Forum: Central Heating and Air conditioning and Ventilation Forum
Topic: underfloor heating
Replies: 2
Views: 1795

Re: underfloor heating

Tip: Electric underfloor heating is much more expensive to run than the wet systems, but electric is cheaper to install.
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