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  1. M

    Electric to Aqualisa digital shower - flow rate question

    Hi folks, I'm thinking of replacing my 10.8kW (mains-fed) electric shower with a Aqualisa digital shower (fed from my WB 37CDi combi + mains) so I've measured the following flow rates : The flow rate from the electric shower (at a comfortable showering temperature) is currently 6l/min...
  2. M

    Toilet constantly running

    Hi, I've got a problem with a dual-flush toilet - water in the cistern has started to run into the toilet bowl slowly and constantly. Sometimes a 'small flush' stops it and sometimes it doesn't. The cistern isn't over-filling, so it's not water running down the overflow that's...
  3. M

    CU upgrade - which of these issues need sorting ?

    Hi guys, I've got an old Wylex CU with rewirable fuses which I'd like to upgrade to a modern CU with circuit breakers and (presumably) RCD protection. NB. Main fuse is 60A. The two separate 40A RCDs serve two electric showers - 10.8kW via 10mm2 cable & 9.5kW via 6mm2 (the latter of...
  4. M

    Question about window lintel contruction

    I noticed recently when decorating an upstairs bedroom, that the area above the window sounded hollow when tapped. Sure enough, when I came to drill holes for the curtain pole brackets, I started drilling only to find wood beneath the plaster. My current house was built in 1972 and is a...
  5. M

    Extra socket - add a spur or incorporate into ring main ?

    Hi folks, I'd like to add an extra double socket in a bedroom but I can't run a spur from either of the two existing sockets, so which of the following two options is preferable ? 1) Add the new socket as a spur using a 30A junction box connected between the two existing sockets 2) Make...
  6. M

    Swapping a Worcester Highflow for a Baxi Duotec

    I posted a few weeks ago about trying to sort the ventilation issues with my mother-in-law's Worcester Highflow 3.5/4.5 floor-standing combi. Well in the meantime, after having a problem with the pilot light, she's decided that she wants a new boiler and got British Gas in to give her a quote...
  7. M

    100cm2 ducting to outside required - any ideas ?

    My mother-in-law has a floor-standing Worcester Bosch combi in an airing cupboard. The installation instructions require a 100cm2 duct to be installed from the adjacent room (a landing in this case) to the outside and she only currently has a cylindrical duct with a diameter of 10cm2 (ie...
  8. M

    Light switch in a cloakroom/WC

    I have a downstairs WC (toilet and small sink). The previous owners hung the door the other way, so that the lightswitch was left behind the door - this makes it (obviously) awkward to get to, particularly as the window is small, making the room dark even during the day. There is no...
  9. M

    Gas main bonding question (with pic)

    Hi guys, Below is a photo of the back of my gas meter cupboard. I've read on this forum that the incoming gas main should be bonded on 'my side of the meter' so my question is - in my case, which side is that ? The pipe on the right is nearest the street and the pipe on the left (with...
  10. M

    My CU must be earthed...but where ?! (with pics)

    Hi, I bought a house last year and this is the electricity meter/CU set-up in the garage : The house was built in 1972 and I've so far been unable to locate where the supply is earthed. All the house circuits exit the CU at the rear and disppear into the wall, but there is no...
  11. M

    Quick Q about Speedfit pipe inserts

    There are two inserts available for Speed fit pipe. A Superseal insert when using Speedfit pipe with Speedfit fittings : www.speedfit.co.uk/part_spec.asp?s=STS_S1 ..and a pipe insert when using Speedfit pipe in standard compression fittings : www.speedfit.co.uk/part_spec.asp?s=TSM_S1...
  12. M

    location of switchable fused spur for new combi boiler

    Hi guys, Are there any restrictions as to where a switchable fused spur (to isolate a new combi boiler) can or cannot be located ? The spur is currently just to the right of the new boiler's intended location, near the top and the pipes exit the boiler underneath and go down the wall. I...
  13. M

    Flushing a new system before combi install ?

    Hi guys, I'm currently replacing all the radiators and all the pipework in my house, ready for a new boiler (Worcester 37CDi combi). The house is fairly large, so effectively has two circuits - the upstairs pipe runs will be in copper with soldered fittings (mainly Yorkshire) and the...
  14. M

    Mains water expansion vessel on a combi system ?

    Hi guys - here's a quote from the 'Supply requirements' information for a combi boiler I'm interested in : http://www.worcester-bosch.co.uk/index.php?fuseaction=product.detail&con_id=231281&detail_id=127860 "Where back-flow prevention devices, including water meters, are fitted the...
  15. M

    28mm/15mm CH system to 22mm/10mm

    Hi guys, The 35 year-old Glow-Worm conventional boiler that heats my fairly large 4-bed house is situated about 4m away from the main body of the house, at the far end of a single-storey extension. The flow and return pipes that exit and enter the boiler are 28mm (boiler has 28mm...
  16. M

    Attaching mains stopcock to a ~22mm (OD) plastic pipe

    I need to replace my mains water stopcock. It's attached to what appears to be a 22mm (or closest imperial equivalent) OD black plastic pipe that enters the house through the floor. The house was built in 1972. Pic : http://i55.photobucket.com/albums/g136/mikej2005/stopcock_02.jpg I've...
  17. M

    Factors affecting combi boiler kW-rating choice

    Hi guys. I'm intending to replace my ageing, inefficient 'Glow-worm 67/75' (67 or 75k BTU/h) conventional boiler and vented cylinder set-up with a modern, condensing combi, like the 'Worcester Greenstar 30CDi' or '37CDi'. A quick, rough online calculation for the total radiator capacity (15...
  18. M

    Electric shower overheating - question about heat exchangers

    My Gainsborough Energy 2000x electric shower has suddenly started to run extremely hot - too hot even on the medium power setting with the temperature control at the coldest setting. The shower sounds rather like a boiling kettle and you can hear it subside, even after the water has stopped...
  19. M

    Replacing mains water stopcock - advice needed

    I've just gone to change a tap washer and discovered that my mains water stopcock does not turn the flow off sufficiently to do the job. Even when fully tightened, enough water gets through to make the job tricky. Luckily there is a built-in drain-point in the stopcock, so I was able to open...
  20. M

    Boiler replacement in a 4-bed detached

    Hi folks, I moved into a 4-bed detached house towards the end of last year which is heated by an old Glow-Worm floorstanding boiler that's probably as old as the house (~35 years old) judging by it's condition ! The boiler works fine but the problem is that it's costing a fortune to run -...
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