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  1. Sparkgap

    Wet/dry vac on an oil line

    Bod I know had to get a load of contaminated oil out of some steam engine sumps. Used a heavy duty vac into an old milk churn: made two pipe connections into the lid of the churn, one which was at top and other dipped in about 6". Attached vac to the top connection and used a hose off the other...
  2. Sparkgap

    Heat loss from pipes

    I recommend this site Heat Loss from Uninsulated Copper Tubes Lots of very useful stuff there. There are also other pages with losses from pipes with insulation of various thicknesses.
  3. Sparkgap

    Solar panels on a canal boat

    Or somebody I know who mistook filler caps on a small railway loco and poured 10 gallons of diesel into the gearbox! Cleaned it up nice tho'.
  4. Sparkgap

    Wiring for dual circuit and pump overun?

    SOOOO much wrong!!! :-) 1) Repipe cold feed into boiler return. 2) Fit auto bypass valves to pump circuits 3) Change pump positions to put pumps on flow so systems are under positive pressure (you'd be surprised how many systems I've come across where they've fitted rads in a roof and wonder...
  5. Sparkgap

    Heat loss from pipes

    According to my trusty CIBSE guide, horizontal copper pipes (tarnished) in ambient air loses 32 & 25w/m (for 15mm flow and return) and 43/33w/m for 22mm F&R), but that is assuming they're in free air. If in the floor void it will be less as the ambient temp will increase. Total comes to about 4.1kW.
  6. Sparkgap

    Vertical Radiator not getting hot enough

    I agree, sounds like rebalancing needed.
  7. Sparkgap

    Humming pipes in a combi boiler system, bleeding not helping.

    if you've a combi system then probably not got a water tank in the roof. Have had cases of humming/vibration due to slight ripples in tank moving the ballvalve slightly and causing noise as the flow is interrupted. Could be toilet cistern. When you hear the noise try turning on a mains tap or...
  8. Sparkgap

    S Plan Vent Feed Options

    Go with 1. Ideally, you want the cold feed to dip under and connect into the bottom of the pipe to stop possible gravitation into the tank.
  9. Sparkgap

    Chasing rad pipes into walls

    Having chased my kitchen walls for new wiring, yeah, one hell of a mess even with an extractor! I would suggest covering the pipes with a plastic or metal cover under the plaster, means you shouldn't get cracking from pipes moving as they expand if buried in solid plaster. Instead of chasing...
  10. Sparkgap

    Buffer Tanks - 2 or 4 port connections

    Basically, a complete redesign incorporating the existing plant plus whatever extra is needed to get it working correctly. At least an additional boiler, pump sizes?, incoming gas large enough? etc. etc. Merry Xmas!! :clap:
  11. Sparkgap

    Radiators with plastic pipe from behind

    I'd recommend going for smallbore copper off the 22mm down to each rad (depends on what the radiator outputs are) instead of faffing around going 22/15/plastic. Some of my rads are 8mm plastic, others 8 or 10mm copper. Prefer the copper as its stronger and easier to alter/extend.
  12. Sparkgap

    It's bleak up here

    Stand & deliver! :) Nah, it was tied in with the salting guys in highways but 'cause we looked after all the mechanical & electrical, were in the next door office and they didn't have anybody who knew owt about all the testing we (ME!) got stuck with it! Nothing new there. Down by the Sands...
  13. Sparkgap

    Which central heating and water system in village with no gas ?

    If going for ASHP and rads you'll need to bear in mind lower flow temps so bigger rads needed and possible increase to incoming mains supply if you're going to have electric cooker and shower on top. Underfloor heating would be best but depends on how good/bad the building is insulated. Also...
  14. Sparkgap

    Radiator noise

    Wonder how they balanced it up? Assume they took the TRV heads off bearing in mind how mild it is at the moment. And yeah, if you've got most rads with TRVs you will need an auto bypass valve otherwise as soon as the TRVs start closing you'll get more water being forced through the others and a...
  15. Sparkgap

    Does Slower pump speed= better condensing

    Slowing the pump will not necessarily make the boiler condense any better. You're better off turning down the boiler stat a bit. Heat output into a room from a radiator will depend on rad design, room temperature and mean temperature through the rad. Turning the pump down (assuming it still...
  16. Sparkgap

    Central Heating stopped working

    Got the same boiler. Presumably your timeswitch is wired across the room stat terminals? Do you have a room stat in line as well or just using the timeswitch? If you're competent with a screwdriver you could move the red wire on terminal 5 to the black wire on terminal 3. If the heating comes on...
  17. Sparkgap

    Buffer Tanks - 2 or 4 port connections

    So, if the job was tendered on a design, the design was pulled and they had to do it themselves (which presumably wasn't included in the original spec)..... let's see, redesign from the original, V.Os/AIs, I'm sure somebody looking at it on the contractual side could make a very good case for...
  18. Sparkgap

    It's bleak up here

    So bad it's blowing the sheep over! Is that at Stainmore? Used to look after the roadside weather stations in ***bria 20 years ago and checking the one at Stainmore in February was a pig: had to put the ladder up on the carriageway side, freezing yer pods off despite being wrapped in...
  19. Sparkgap

    HALL of SHAME PHOTo`s

    Nail in place of the fuse? Bet the water doesn't get very warm :grin:
  20. Sparkgap

    Buffer Tanks - 2 or 4 port connections

    Having worked for three councils, two contractors and done consultancy work as well it now seems that many councils have got rid of the people who actually know how things work and just hive off stuff to some favourite consultancy! The consultants in their turn don't seem to bother designing the...

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