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i need to fit a by-pass to my combi boiler does it have to be an automatic one or 22mm pipe and valves? 
by-pass
- Thread starter smudge1946
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Automatic
- Joined
- 14 Nov 2005
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- 14
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- Country
Thanx.
Which make and do i fit it on flow or return/ do i have to set pressure on valve or is it pre-set like the old relief valves i used to fit years ago?
Which make and do i fit it on flow or return/ do i have to set pressure on valve or is it pre-set like the old relief valves i used to fit years ago?
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