DIY Doctor

power flush

Postby redkev » Mon Apr 21, 2008 9:24 pm

if u go to power flush a system with a heating tank do u have to blank the pipes before u start flushing a system. expansion and cold feed?
Rank: Tradesman
Progress to next rank:
Posts: 39
Joined: Wed Jan 09, 2008 6:28 pm


Simply Build It

Postby Rico » Tue Apr 22, 2008 8:36 am


You can either use rubber bungs, depending on shape of cold feed outlet or, use pushfit stop end on expansion pipe, hold finger over cold outlet, cut pipe and blank both ends, then reconnect after with either pushfit connector or compression fitting.

Rank: Tradesman
Progress to next rank:
Posts: 38
Joined: Wed Feb 27, 2008 11:55 am

Postby htg engineer » Tue Apr 22, 2008 10:18 am

If you're a DIYer I wouldn't advise powerflushing a system yourself. The system has only ever been used with low pressure applying pressure via the powerflushing machine could cause more problems that it'll cure.

You have to isolate the expansion pipe, normally connecting the cold feed and expansion pipe together meaning the whole system is flushed including the fill and vent pipes. Fitting a isolation valve so that this section can be shut off when flushing other parts of the system.

Modifications should only be made if you thoroughly understand the set up of the system - as if incorrect could leave you with a dangerous heating system.

As you have had to ask the question how to do it - tells me you don't thoroughly undertsand the setup therefore it would be dangerous to attempt this yourself.
htg engineer
Rank: Project Manager
Posts: 3256
Joined: Tue May 22, 2007 5:22 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics