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- 24 Apr 2004
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We have a conventional boiler with vented hot water cylinder and two tanks in the loft. All the electrical gubbins is honeywell as is the 3 position port.
Trying to get my head round all the plumbing before I add a feed for the pumped shower and comparing to all the diagrams, I have an extra pipe. It tees off from the boiler hot return after the pump but before the AB of the valve and runs, via a gate valve, to another tee on the boiler return next to the bottom circ flange.
Is it to avoid damage to the pump if the valve is closed? I thought the valve was always at least open to A or B, returning to B with no voltage applied?
Thanks
Trying to get my head round all the plumbing before I add a feed for the pumped shower and comparing to all the diagrams, I have an extra pipe. It tees off from the boiler hot return after the pump but before the AB of the valve and runs, via a gate valve, to another tee on the boiler return next to the bottom circ flange.
Is it to avoid damage to the pump if the valve is closed? I thought the valve was always at least open to A or B, returning to B with no voltage applied?
Thanks