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Discuss advice needed on new pipework on boiler in the Fittings & Pipes area at

  1. a5ian300zx

    a5ian300zx New Member

    Hi All,

    I am doing some work in newly bought house and the plumber had looked at the Valiant boiler and said it was very dangerous and needed piping inc few other bits of work but wanted to know how much that would cost as he quoted me £1600. he said the boiler is a good one and its fine just the pipework and other bit.

    I am situated in London as i know London pricing can be different.

    so currently the boiler is located in the kitchen and the kitchen is stripped down to bare bones as the new units have not been fitted yet.

    replace 15mm inlet gas pipe with 22mm pipe all the way to meter and earth the meter regulation standard
    new flute which will be fully sealed (current one not sealed)
    run a new gas feed from boiler to new hob (see diagram)
    run new pipes for kitchen sink (see diagram)
    redo whole piping under the boiler joining onto existing pipes located on left of boiler (check pictures)
    this includes relocating the pipes to the bottom that go into the cloakroom toilet
    redoing the two exit pipes outside
    replace magaflow filter
    powerflush (tank in loft disconnected now)
    Gas mark safe certificate
    replace sink and toilet in cloakroom toilet (which I have supplied)

    he goes he charges £150 @ day and will take him 5 days to complete the work and the rest is materials.

    so overall £1600 for the whole work.

    is the above a good price or overpriced for the work needed?

    any advice is appreciated.



    View attachment 30684

    View attachment 30685

    View attachment 30686


    Last edited: Aug 22, 2017
  2. Darren Jackson

    Darren Jackson Plumber GSR

    Over all sounds like a very good price. Just make sure and check the engineers credentials with gas safe before employing them and ask them for any references from other customers that have used them. Good luck.
    • Useful Useful x 1
  3. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    How old is the boiler ?
  4. a5ian300zx

    a5ian300zx New Member

  5. gmartine

    gmartine GSR

    Get more than one estimate and make sure all the work to be done is in copper.

    Edit: Take a pic of the boiler, someone will have an idea what it is.
    • Like Like x 1
  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    If it's 8 years old it's coming to the end of its life span realistically 10-12 years max
    • Informative Informative x 1
  7. steadyon

    steadyon Active Member

    If he's charging £150 / day in London make absolutely sure he's qualified to work on gas, and qualified in his own name. Being qualified in his employer's name is not good enough unless you are paying his employer for the work. Have a look at Pimlico Plumbers price list for a comparison!

    He must be gas safe registered to work on the flue and gas pipes.
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  8. king of pipes

    king of pipes Trusted Plumber GSR Top Contributor!!

    It is a mess and for london rates its about the right price just check they are gas safe registered cheers kop.
    • Informative Informative x 1
  9. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    also the gas looks like its on the right in 28mm ????
  10. scott_d

    scott_d Plumber GSR

    The boiler case looks rusty at the bottom
  11. a5ian300zx

    a5ian300zx New Member


    Thanks for all the advice.

    The boiler looks like the one attached (its not a picture of my actual boiler)

    External Pipe connections
    C.H Flow (IN) / D.H.W Outlet (IN) / GAS Supply (OUT) / Cold Water Feed (OUT) / C.H Return (OUT)


  12. a5ian300zx

    a5ian300zx New Member

    I think its 22mm pipe which is going up into the ceiling.
  13. Gasmk1

    Gasmk1 GSR

    The gas looks like 22 mm at least up to to the tee which then goes up and the 15 mm branch feeds the boiler ask him to check properly because the final connection on vaillants this age is 15 mm for the gas
    • Informative Informative x 1
  14. gmartine

    gmartine GSR

    Point being if that's a 22mm or 28mm up to the tee it might not need upgrading back to the meter as quoted.
    • Informative Informative x 1
  15. jtsplumbing

    jtsplumbing Plumber GSR

    Photo of flue would be nice (Not sealed) To be honest 8 t0 10 year old boiler now is the time to replace it B4 new kitchen is fitted, Lots on the market with up to 10 year warranty, sod's law short time after kitchen is completed something major will go wrong with boiler They don't like the London hard water.
    • Like Like x 1
  16. a5ian300zx

    a5ian300zx New Member


    The boiler is a ecotec plus 618 as per sticker and underneath it says ecotec Pro 28 r2.

    I will upload the pic of the flue when I am on the computer next as it does not work on the phone.

  17. a5ian300zx

    a5ian300zx New Member

    Picture of Flue and exit pipes on side of house.

    He said will replace the whole Flue and redo the exit pipe so it goes to the drain as its dangerous as one will spill out hot water and the second (white) is mixture of Cabon monoxide and water.


  18. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Yep they need sorting also something he didn't pick up on you need to check the rain down spout goes to main drainage and not a soak away
    • Like Like x 1
  19. a5ian300zx

    a5ian300zx New Member


    Which one is the rain down spout?

  20. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    The black cast iron pipe right of the flue that the white pipe goes into
    • Informative Informative x 1
  21. Chalked

    Chalked Plumber GSR

    IMG_0050.PNG IMG_0051.PNG Hi
    It's always surprising how quick time goes and how young customers think there boiler is. I think you will find that model ceased manufacture in 2000! So it's a minimum of 17 year old.
    It was a good boiler. If it's still in good health, it should see a few more years. Start saving a few quid for a new one.
  22. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    New vaillint flue compatible??
  23. sammathias

    sammathias GSR

    How on earth people get away with installations like this is beyond me!!! Boiler is atleast 10 year old? if he could get a compatible flue it would cost best part of £80. Gas pipe looks like it branches off 28mm with short run of 15mm. Probably satifactory.
    In all honestly best to bite the bullet and replace the boiler, and all that god awful pipework!
  24. sammathias

    sammathias GSR

    Think thats the wrong boiler as the one your quoting is non condensing. think heres is an ecotec pro early revamped in 2008 i think??
  25. Ric2013

    Ric2013 Plumber Top Contributor!!

    They've quoted £150 a day and that's about the right price for London? Recently I've been told on this forum that I should be charging at least £180 a day in Colchester (Essex/Suffolk border). Now I'm confused...

    EDIT - I now see location is no longer under name as on the old forums, but Colchester is hardly a low-price area, compared with most of UK.
  26. Ric2013

    Ric2013 Plumber Top Contributor!!

    Or do you mean £1600 is about the right price, KOP?
  27. robj20

    robj20 Member

    I thought condensate externally should be run in 32mm min and lagged?
  28. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

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