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Recent content by Sparkgap

  1. Sparkgap

    Shared main swapping internal stop tap

    If you have sight of the incoming main to the property surely it would be easy to put in a pit and stopcock for future? Let the neighbours know the water will be off for a short while (or if you CBA just do it live!!! :-)
  2. Sparkgap

    The importance of polarity

    1) Direct feed from the control panel with its own MCBs. No RCD. 2) The issue was L/N swapped, not L/E. I'm assuming that the FFD circuit referenced to neutral and with the L/N reversed was not getting the correct signal hence locking out despite the flame established. I did have a sparky wire...
  3. Sparkgap

    Suitable heating system choice

    I'm involved with a new ASHP/wet system installation to an existing property. They are going for a high temp ASHP so about 70C output. COP is about 2 so more expensive to run and rads need to be oversized by about 30%. That is the problem with heat pumps in existing properties: you either need...
  4. Sparkgap

    Zoning systems

    Generally, I've been putting buffer tanks on the heating side. Helps maintain the system while the heat pump goes through the defrost cycle. Also useful if you get a heavy HWS demand and the heat pump is busy charging the cylinder.
  5. Sparkgap

    Weather compensation, low boiler flow temp & bacteria

    Bearing in mind most sealed heating systems will be lacking oxygen anyway I haven't heard of this being a major issue. I turn down the heating temp on my combi during warmer weather and back up to full during cold spells so this would sterilise the system anyway.
  6. Sparkgap

    The importance of polarity

    Talking with one of the guys in the office about a mysterious boiler fault (runs, ignites, locks out) reminded me of an issue in a new boiler room some years ago. Three new gas boilers all installed at the same time, due to handover to client but one boiler kept locking out. It would go through...
  7. Sparkgap

    Height of soil vent above connection.

    No problem with the 900mm from openings as it will be well clear. When you say highest inlet would that be where the WC connection would connect to the outside stack, or where the basin connects into the pipe within the roof or even where the WC or basin exits through the bathroom wall? I want...
  8. Sparkgap

    Height of soil vent above connection.

    I think a sketch will help. The new vent would be 900mm above the branch, well above the nearest window.
  9. Sparkgap

    Height of soil vent above connection.

    The soil pipe from my bathroom passes through the outside wall and into the roofspace above the adjacent single storey kitchen before dropping into the ground at the end of the kitchen (about 4.5m out). The existing vent riser comes off outside the bathroom and rises through the roof on the...
  10. Sparkgap

    LPG Jet for 1950s Cannon Gas grill

    When they converted to northsea gas in the 70s, Alston in ***bria wasn't near a gas pipeline so as a temporary measure they ran the town on a LPG/air mixture which had the same calorific value as natural gas, so once they laid a pipeline they didn't have to reconvert peoples appliances. You...
  11. Sparkgap

    One zone will not heat up.

    So, it's separate manifolds for the bedroom and dressing room. Have you checked the flow/return temps to the manifolds? Assuming each manifold has a pump could be the pump on it has jammed or failed.
  12. Sparkgap

    Vaillant Controls - is it possible to mix wired and wireless?

    How are your heating zones wired? Usually for your typical S-plan with 2 or 3 valves you'd have the room/cylinder stat/s controlling the zone valves and the aux contacts on the valves switching the boiler/pump. If this is the case you'd just have the wireless receiver near the valve to control...
  13. Sparkgap

    LEAK UNDER FLOOR. BOILER ON ALL THE TIME AND WHAT IS PART IN PHOTOS?

    Can't tell what the bit is, but the underfloor leak is probably on your hot water side, not heating. Don't know why the heating is not working but the pressure gauge measures the heating system pressure. Simple way to find out is shut off the hot water outlet valve from the boiler (NOT the...
  14. Sparkgap

    hep2O piping to rads advice

    Depending on what size/type your existing rad is and how much more heat you want, could you get a bigger rad but the same length, ie K2 or K3 or a higher size? That way you don't need to change/extend the pipework.
  15. Sparkgap

    Strange Radiator Valve Screw

    Was it Hoval or Ideal valves? Used to have loads of those knocking around: rectangular piece of steel with a couple of square holes in and two prongs off each end. Prongs unscrew the lockshield valve cap, square holes for adjusting/shutting the valve. Simples!
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