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Recent content by johnduffell

  1. J

    Caleffi Pressure reduction valve causing noise

    Could be the flow rate is so low for the size of valve it's bouncing. Have you got a straight run of pipe after the prv to stop it reflecting back and forth and resonating? Ps I'm not a qualified engineer.
  2. J

    washing machine waste pipe

    That is a good point, the actual waste pipe has to have the right falls etc, but before the air break you can do what you like within the manufacturers instructions. Some machines have optional extensions to the hous as long as you don't go too far above the machine base or vice versa.
  3. J

    washing machine waste pipe

    Slope isminimum 18mm per metre. Only guttering can be laid level but it does affect the capacity. Falls Must be carried through any junctions or branches. Minimum pipe size would be 50mm but you might get away with 40 if you include an aav, and all other aspects of the system have good falls...
  4. J

    combi boiler, pressure continuously increasing.

    Try turning off the cold feed for a while and turning on a hot tap to release the pressure. Could simply be **an internal component related to hot water costing around 150 pounds** although you need someone to fit it. *Edited to not name the component just in case
  5. J

    washing machine waste pipe

    Even if you're in the right part of the span, there's no way to notch a 50mm waste into normal depth joists and meet building regs let alone get the right fall over 3m distance. Boxing in above or below or in our case i dropped it straight down to the ground floor and ran out under the suspended...
  6. J

    Mouldy / Rotten smell around boiler

    Probably wafted through the cupboards to the boiler area, can we have a photo of any waste pipes in the cupboards nearby, also can you look under the plinth if it's removable.
  7. J

    risk from a copper pipe with little support?

    The main risk i can see would be repeated movement from the water hammer especially in the washer hose would eventually weaken and crack the pipe. Good idea to fix it.
  8. J

    washing machine waste pipe

    There wouldn't be an issue if the existing wastes are installed correctly with falls and ventilation correct and not blocked and the combined pipe is increased to 50mm, but it may not be worth the hassle if there is another way round it. The only time it would come in the bath would be if the...
  9. J

    Nightmare time with Worcester Bosch repairs

    Just to pick up where the other John left off, under normal working conditions the two will be identical. It's only setting the initial charge that it needs to be only air in there. Once your charge is set correctly and confirmed correct, you only need to worry about the overall system pressure...
  10. J

    Did I get ripped off? - Shower mixer replacement by local plumber

    There's only a need to replace the broken part otherwise there would be a lot more cost for making good, but that does look a bit low for a wall mounted mixer shower. Normally at that height the hose comes out the top. If you want to have the wall plate replaced too you could specify that but it...
  11. J

    Nightmare time with Worcester Bosch repairs

    That's not true as water is incompressible for all practical purposes. The only bit that can expand when water is lost is the air in the expansion vessel. That will have been a specific case where the expansion vessel no longer had any water in it. At the moment when the last water leaves the...
  12. J

    Just when you thought you'd seen it all.....

    first prototype unvented cylinder! did you report it?
  13. J

    Pulled out washing machine, this is what we found.

    Correction, NHBC scheme once the builders finished the snagging is not a warranty for the buyers, it's purely for the mortgage company. Only the first couple of years get a warranty on basic problems that don't really affect the value, the remainder is only the structural side i.e. things that...
  14. J

    Speed fit reducer disaster

    I've (for DIY) had some trouble with weeping compression joints onto plastic (copper olive, correct insert) so I avoid where possible and use a length of copper into the next speedfit connector, it's easy enough and the speedfit connectors handle copper no trouble. Personally I think speedfit...
  15. J

    Fixed “2 litre per minute underfloor leak”. Thank for advice.

    Oh yeah bath waste! My eyes and perspective didn't go correctly together! Worth supporting anyway and prevent stress on the connections.
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