Actually that sounds like a fun thread - hearing how the pros do it ;-)
Builders - Snagging
Jul 15, 2017
27 Replies
They often say words to the effect of only needed if the primary water volume exceeds n litres. Which for average installs ought to be fine, but might cause a problem if you have a 200L primary direct heat bank etc.
This is on the potable side...
Both an old Alpha CB28X (?) and a WB 30i said to install one.
That's the last thing I want absorbing pressure :-)
Owain
The electric under sink heater I once installed also said install one.
It also required a non-return valve to stop water that had, potentially, been keep warm for weeks being forced back far enough to contaminate the supply with bacteria like legionella.
TBH I have been telling you about the ones I have seen for the last few years - and thrown in photos where I can.
Maybe it needs it's own wiki article.
Kind of like a hall of shame?
definitely. Maybe more than one.
NT
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