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Boiler manufacturers require that the system is cleaned to BS5793 before the new boiler goes in. Adding a chemical before replacement is one of the ways covered by the BS. If that route is taken then the following procedure must be used. 1. Add the chemical and leave the system working...

How it is cleaned is up tot the B.S. not the installer - although he/she does have a choice of methods. The can go the chemical clean route (i.e. add chemical, run system for a week or two BEFORE the new boiler goes in, drain, REPEAT and drain again.) Or powerflush. Of the two...

Frankly, a powerflush is the best way to clean out the bigger bits of rust that the vast majority of standard clean and drains will not do. One thing - BS 7593:2006 is the code of practice for treatment of water in domestic hot water heating systems. What your plumber is proposing is...

I've a rather well-used Sentinel (mark II) unit. After 200+ flushes the stainless outlet had a crack that I should have got fixed as soon as I saw it. Local welding shop fixed it for 50 quid. Apart from that, if you are going to do a lot of powerflushing you might want to change the...

Hello Tim Please be VERY careful when adding x400 or 800 to your system. If you have 8mm microbore you stand the chance of making your problem worse. Most systems have a mix or different rust types n them - some larger pieces and the very fine magnetitie that turns the water black...

Powerflushing and heating system specialist. www.pritchard-heating.co.uk

Thanks for the info Agile.

Sorry moderator 11. Have now read rules re contact details and will stick to them. For clarity, and with no cheekiness I assure you (it;s your site after all) ...is it ok to offer my phone number when relevant for people to get more info? Thanks muchly, Ian Re. temp drop across f & r...

Hello there. A fine series of questions you have asked there. Firstly, please let me tell you that I am biased when it comes to powerflushing and how it shouldbe done properly. I own a busy heating and plumbing business that specialises in powerflushing. Over 500 done. Right now we;re...

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