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by rogerlucy
Wed May 06, 2009 7:30 pm
Forum: Plumbing Forum
Topic: Unvented systems
Replies: 1
Views: 2878

Unvented systems

I need to drain down an unvented system: There are a number of gatevalves on the tank. Is it just a case of turning them all off and then draining from a rad, then when done open all the valves to refill and bleed the system?
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