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  1. MrGatch

    UFH Pump Question - Do I need it?

    We have a three zone heating system plus water cylinder (OSO Super S 250L) on an Valliant EcoTec 637. Two CH zones and a UFH zone. Boiler is rarely at maximum power rating, even at full tilt. The UFH zone has it's own pump and the other two zones (three storey house) are just pumped from the...
  2. MrGatch

    Leaking Shower Valve

    I have a leak coming from the bath/shower/off switch on the attached shower valve. The leak is coming from what looks like a rubber washer behind a brass retaining clip. I've not removed the retaining clip as if I make the leak worse I won't be able to switch the water back on. Any ideas with...
  3. MrGatch

    Possible fault two-port valve

    Hoping you guys can help confirm the diagnosis of a fault before I call a plumber. I've lost heating to the upstairs zone on my heating sysem. System boiler is working fine feeding two other zones and the hot water. The zone is connected via a Nest, which is saying its calling for heat but...
  4. MrGatch

    Burning Smell and Flames on Electrical Immersion

    I have a smell of burning from the immersion on hot water cylinder. The overheat pin had popped out, but when I popped it back in and switched on there were tiny smouldering flames around one of the contacts where the thermostat connects to the immersion. Separately I've replaced the timer as...
  5. MrGatch

    Immersion Cover Nuts

    Hi, I've just bought two new plastic covers for cylinder immersion heaters as they are both missing on the cylinder. Does anyone know what the thread size for the small securing nuts that I need to attach the covers to the immersion? Thanks
  6. MrGatch

    Central Heating Flow Rate (Rads+UFH)

    I have a house over three floors with three heating zones. Ground floor is UFH and newish, the 1st and second floor are radiator zones. Historically the radiators don't get very hot on the top floor, however I've just switched them on for the first time since last winter and they are the best...
  7. MrGatch

    Flow/Return Colour Codes

    Are the any standard colour-codes or conventions for labeling central heating, water and gas pipes? I'm looking at insulating the pipes in my cellar and am considering marking up the flow/return and H/C water pipes as I'm going along. Appreciate that yellow is for gas and possibly red/blue for...
  8. MrGatch

    Water Supply 'Tripping'

    Really odd problem with my cold water supply stopping abruptly with flow suddenly halting with a water hammer. I've been doing loads of work on upstairs bathroom and have been switching the water off and on a number of times over the last month to plumb in new toilet, sinks, shower, bath etc...
  9. MrGatch

    Odd issue with Nest controlling hot water

    Hi, Heating engineer fitted me a new system boiler and a cylinder recently converting from a combi. System has three zones controlled by Nests including the hot water. I've just noticed that the hot water doesn't seem to get warm according to the Nest schedule so I investigated and found an...
  10. MrGatch

    32mm Pipe Insulation

    Hi, I'm having a new 32mm supply pipe fitted to my property that will travel under a strip foundation and then under timber subfloor before appearing out of a wall into a garage into the stopcock etc. The water company have advised about ducting and insulation. I'm using an off cut of soil...
  11. MrGatch

    New Water Supply - Domestic Connection Options

    I have a new 32mm MDPE supply pipe being fitted at my property and my builder and I have been discussing how best to connect it up to the existing 22mm copper water pipe inside. There obviously needs to be a stopcock, meter adapter and drain-off valve in between the two. There doesn't seem to...
  12. MrGatch

    Flow rates with this combination of pipes/equipment

    At the moment I have a very old 15mm copper water supply entering through a wall in the cellar. This services a 15mm network of cold water and a combi boiler (Worcester 37kW) on 15mm copper throughout. The house is over 4 floors with a lot of outlets. 5 toilets, 4 showers, 2 baths. Family of 4...
  13. MrGatch

    Effect of replacing 22mm copper with 15 plastic

    Hi, I have a large three storey cold Victoria house and I'm having an extension being built which adds a large amount of additional volume to heat. The new space will be UFH and the existing heating system zoned to upstairs and downstairs. The entire heating system is a single zone in 22mm...
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