Central Heating - How the mid position Y plan 3 port valve works
Part 4 in the heating wiring series covers how the 3 port mid position valve works internally, allowing 3 separate positions from only 2 mains inputs.
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Видео Central Heating - How the mid position Y plan 3 port valve works канала John Ward
Website: http://xo4.uk/?y3P
Patreon: https://www.patreon.com/jwflame
Contact info, sending stuff in etc.: http://xo4.uk/?YTT
Видео Central Heating - How the mid position Y plan 3 port valve works канала John Ward
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