preventing corrosion of a drained system

Postby thanassi.bakas » Sat Jan 26, 2008 7:41 am

In a 44 year old house with a two pipe central heating system installed in the concrete floor, i will have to drain the system to install new radiators in two bathrooms i am renovating. Is it true that draining the system encourages corrosion of the steel pipes and if so what is a safe period of time for a system to be left empty of water? Also, if copper pipes are to be connected to the existing steel ones what is the proper way to do so?
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Sat Jan 26, 2008 7:10 am


Simply Build It

Postby htg engineer » Sun Jan 27, 2008 6:00 pm

Definately steel pipes ?

There isn't really a time limit on how long the system should/shouldn't be left empty.

If you're living there or even if the house is empty in this weather I'd guess you'd want it re-filling asap, for warmth and also if the house is empty then the tank, hot water pipes, cold mains etc could freeze.

It would be best to have the heating on for a few hours during the night.

Compression fittings should fit copper and steel pipes
htg engineer
Rank: Project Manager
Posts: 3224
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