Recent content by DP

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    Replacing ST699 with ST9400C

    Connect the red rhermostat wire to CH no where you have got the pump wired to and yellow to pump. You will only get central heating when hot water is on Replace your Honeywell roomstat ( EPH Controls 1-Channel Wired Battery-Operated Programmable Room Thermostat) will move this task forward and...
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    Replacing ST699 with ST9400C

    OP has Honeywell programmer that does not have access to C contacts. Had already suggested change room stat to programmable roomstat will allow gravity HW with chosen Honeywell programmer or to install a motorised valve with 6 wires ( 28 mm MV allows that or Honeywell head, or a relay)
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    Replacing ST699 with ST9400C

    In that case HW NO to boiler and CH NO to pump Switch hw zone will fire the boiler to heat water To get heating hw will need to be on also
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    Replacing ST699 with ST9400C

    As far as I can comprehend, your programmer limitations is due to the fact that C terminal connections is internal. This setup is ideal for fully pumped. For gravity you need access to C terminal. St9100 gave you access to all the terminals but that programmer is now discontinued Gravity hot...
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    Replacing ST699 with ST9400C

    8 is taking 240 from L When HW is on 6 runs the boiler and feeds live to 5 also. If CH slider on position then pump will run if HW time is calling If HW is not calling, no CH either. There is a better way to do this where ch operation starts the boiler and pump or hw only operates the boiler...
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    Replacing ST699 with ST9400C

    You can have gravity HW by purchasing a single channel programmer ( it will have C, NO, NO) and replace the thermostat with programmable battery operated thermostat with three terminals. With this set up timer will control HW and thermostat the heating. Have done this a few times. Danfoss FP...
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    Pop Stars Meddling in Politics

    Woke, woke, woke, I am now ‘woke’ up. I cannot understand what woke means. My take is if someone does not agree with someone’s politics, then they are classed as woke. That could apply in reverse too surely
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    Police cars with blue light and sirens on.

    What would require cops to attend with three saloons and two transit type van.
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    Charlie Kirk

    According to this, Jesus was born in Glasgow
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    Will 500mm tap tails be ok to replace 360mm ones?

    The flexi pipes that come with the taps, I would always extend the copper hot and cold pipes to meet the tap connectors be it flexi or into base of the tap ( pillar taps ) Have always done it that way Bending a coper pipe to follow a bend is a lot better looking than unsupported pile of flexi...
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    Will 500mm tap tails be ok to replace 360mm ones?

    Why not extend the pipe? Flexi looks terrible
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    How clean should CH be after flushing?

    Temperature setting is mix the water in the radiator. hot incoming water rises upwards and displaces cooler water below Know from previous a cold power flush will clear the base rib but water above the rib remaining untouched.
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    How clean should CH be after flushing?

    Magic cookies any good?
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    How clean should CH be after flushing?

    Thing that is lost on me OP, you have all the answers going by what you have posted and your responses to what other gas engineers have posted, what is the point of starting this post?
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    Post some movie clips/famous lines that you like.

    Watched a film with Costner and Clint in it where Costner ( escaped from prison) is in a field. Clint asked one if his officers if the prisoner is surrounded. Officer says “tighter then a frog’s pu55y and that is water tight.
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