Search results

  1. M

    draining down to replace motorised valve

    I want to replace a two port motorised valve, Honeywell V4043, to the central heating circuit. The valve is on the top floor by the hot water cylinder. Do I need to drain the whole system or can I just drain the top floor? Must I latch the valves open during draining and refilling? Finally when...
  2. M

    Central heating airlock?

    I have an open vent central heating system, which I drained and refilled in order to replace two TRV s on ground floor radiators. Prior to replacing the valves, it was not possible turn on the central heating independant of the hot water coming on and when I checked the two port motorised valve...
Back
Top