The HW cylinder bypass gate valve is cracked open about 1/2 turn.
If the valve is open too far, is it possible for hot water to flow through the bypass valve and through the rads in the opposite direction to the normal flow? i.e could the problem be due to 'Reverse Circulation'?
If that's the case then it could it be that the 3 port valve may not be faulty after all.
I need to prove this before I go to the trouble of replacing the 3 port valve.
If the valve is open too far, is it possible for hot water to flow through the bypass valve and through the rads in the opposite direction to the normal flow? i.e could the problem be due to 'Reverse Circulation'?
If that's the case then it could it be that the 3 port valve may not be faulty after all.
I need to prove this before I go to the trouble of replacing the 3 port valve.
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