Oil Fired Boilers

Discussion in 'Plumbers' Talk' started by Peter Martin, Jun 8, 2018.

  1. Peter Martin

    Peter Martin New Member

    My daughter currently has a oil fired boiler which vents out the side wall,this is soon to change as a new building will be going on sode of house,this means the vent has to go out back of house through conservatory and vent up the wall beside conservatory.Physically i think it can be done but as pipe will be close to conservatory how far up wall does the vent have to go and does it have to be stainless steel,the run of pipe will be about 12 feet and then 90 degreees up wall , anybody have any thoughts except replacing boiler which is turning into a £5,000 nightmare
  2. Bob Rathbone

    Bob Rathbone Well-Known Member

    Condensing gas boilers have flues that can be extended, oil may be the same. Without a diagram or photo it is difficult to judge. £5k seems steep for a boiler change.
  3. KIAB

    KIAB Well-Known Member

    Flues for a woodburner through conservatory roof,your flue will most likely have to be stainless steel.


  4. Peter Martin

    Peter Martin New Member

    Thanks for help I think another avenue woukd be to go back to electric,would I be right to say that once we ripped out old boiler and controls apart from some pipework a electric boiler could replace it to power radiators and hot water
  5. KIAB

    KIAB Well-Known Member

    Oil combi boiler.:)
  6. Peter Martin

    Peter Martin New Member

    This would still need a flue wouldnt it as this is problem
  7. KIAB

    KIAB Well-Known Member

    Yes but you can go through a wall & not up one with the flue...:)

    So, more choice of locations.
  8. kiaora

    kiaora Well-Known Member

    I installed an electric boiler system once, the customer was very happy with it.
    I installed 2 x 6 Kw amptec electric boilers, 2x 6mm cables from consumer unit, so wasn’t expensive to install,

    It was the full rads and cylinder y plan system....

    With no gas available and it was a second home, the old storage system wasn’t up to the job of heating on demand.

    With a suitable multi tariff meter, carful timing it wasn’t that expensive to run,

    Considering gas Boiler, servicing, repairs, regs et.. it’s not to be looked down on?


    Today’s plumbing question,... explain cavitation , no asking mr google!
  9. PhilSo

    PhilSo Active Member

    Plumbers with a poor dental hygine regime consuming too much sugary food.

    PhilSo ( gummy bear )
    kiaora likes this.
  10. PhilSo

    PhilSo Active Member

    Drop in pressure behind an impeller.
    Too fast. Too big. Poor supply.
    Bubbles. :)
  11. kiaora

    kiaora Well-Known Member

    Good answer, something missing? What actually happens ?
  12. Alphadog

    Alphadog New Member

    The liquid boils and then as pressure increases again, the individual little bubbles rapidly collapse and recoils, causing a powerful shock wave behind it.
  13. kiaora

    kiaora Well-Known Member

    Correct! Water boils at the low pressure that it finds itself in!

    Pat on the back everyone!
  14. Bob Rathbone

    Bob Rathbone Well-Known Member

    It is known as 'Cavitation', the low pressure behind the impellor allows water to boil at very low temperature. This restricts the speed of propellers in ships.
  15. PhilSo

    PhilSo Active Member

    Sorry AD & BR

    You took too long .

    You Googled it and I was first.

    The prize is mine.

    BTW. What is the prize.

    Please don't tell me it's LadyNewTo DIY.


    PHILSO ( much like running away :D:D)
    Last edited: Jun 10, 2018
  16. PhilSo

    PhilSo Active Member

    Clients complain.
    Pipes rattle and shake.
    Sounds like you'r pumping pebbles.
    Pump blows up.

    First hand experience.

    Designer heads for the small print in the contract and disappears over the horizon.

    PhilSo ( here we go again )

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