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Discuss Immersion heater - water leaking in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. plumworld

    plumworld New Member

    20171112_154228.jpg 20171112_153334.jpg 20171112_154813.jpg I came home to find water dripping from the ceiling! After turning off the water supply I looked in cupboard housing the immersion heater but I could not find the leak - other than what appeared a leak from the immersion heater.

    The immersion heater is a tribune premier by IMI Water Heating and seems to be leaking at the seems. Is this normal for it to leak from here or should I investigate further? What could have caused it to suddenly leak after 18 years?

    Is it possible to replace this easily? As IMI have gone insolvent what alternatives are available and how much is this likely to cost or can I do it myself?

    Thank you all replies in advance.
     
    Last edited: Nov 12, 2017
  2. Best

    Best Trusted Plumber Top Contributor!!

    When you say immersion heater, - I take it you mean unvented hot cylinder?
    Afraid it will need replaced if the body of cylinder has a fracture.
    If it is unvented cylinder, then work must be done by a G3 plumber.
     
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  3. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Its an easy replacement, but as “ Best “ above says you need a G3 registered plumber
     
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  4. Best

    Best Trusted Plumber Top Contributor!!

    Any brand of unvented cylinder would do as a replacement. The price ranges from approx £500 up to well over £1000 for your cylinder kit cost, plus a few copper pipes & fittings, plus a plumbers charge.
    25 year warranty on most new units against leaking, if you have them serviced once a year, so should be good for a long time
     
  5. plumworld

    plumworld New Member

    I have attached some photographs of the cylinder - it appears to be leaking near the bottom.

    What is the likely cause of the leak? Could it be freezing? What is a good brand? Thank you.
     
  6. Best

    Best Trusted Plumber Top Contributor!!

    The cause of the leak is not something you can do much about. The joints can fracture on stainless steel and some of the quality of the metal can vary.
    Apparently there are more superior stainless steels - Duplex, that claim to resist corrosion or fracture.
    Unvented units all require a means for water expansion and there are two types of designs of unvented units. Most have an external expansion vessel, (but some, like Megaflo, have an internal air gap with a floating baffle. This however means you having to replenish the air gap at times. Megaflo is overpriced.)
    Just get a known brand that your G3 plumber recommends. No need to go too expensive.
     
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  7. plumworld

    plumworld New Member

    If I changed my boiler to a Combi boiler can I do away with the cylinder? So would it work out more cost effective for me to change the boiler (existing one is 18 years) to a combi and save replacing the cylinder? Thanks

    I have a two bed house with two baths and showers and the heating/water works of the mains.
     
  8. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Its a longshot pal , but just carefully check all the pipe connections, especially the top one, any of them can leak and then the water can get behind the insulation and come out of the bottom .

    Otherwise , sorry its a new one
     
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  9. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Are you sure its a combi ?. miss read sorry
     
  10. plumworld

    plumworld New Member

    Sorry, to be clear. The current one is a normal boiler of 18 years. I am just asking that instead of replacing the cylinder could I replace my boiler for a combi and then remove the cylinder altogether?
     
  11. Best

    Best Trusted Plumber Top Contributor!!

    Yes, you could most likely replace boiler to a combi and then no need of unvented cylinder.
    Just be aware that combi boilers do not give same flow rates as unvented cylinders and therefore combi boilers aren't best suited for houses with several bathrooms and several people living there.
     
  12. steadyon

    steadyon Active Member

    You could replace both the cylinder and existing boiler with a combi boiler. However, you'd be hard pushed to run two showers at once with a combi.

    The system you have is probably the best option, and best suited to operating two water outlets at once. If it were me, I'd replace the unvented hot water cylinder, and then the boiler in due course.

    A combi boiler requires a reasonable water pressure and flow rate to operate satisfactorily. You most likely have both given your present unvented hot water system, but do get them tested before you embark on the combi route.
     
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  13. heliotrope

    heliotrope Plumber GSR

    That is in the area of the drain valve on that appliance.

    May not be a serious problem but you should it looked at by someone with the appropriate qualifications to work on unvented cylinders.
     
  14. plumworld

    plumworld New Member

    So a repair is possible? I thought they couldn't be repaired? thanks
     
  15. plumworld

    plumworld New Member

    Can anyone tell me how much should it cost for the Labour for a cylinder to be replaced? My one has good access and I think it should be straightforward to swap. I've been quote £600 plus cylinder and parts in London. Is this steep?


    20171114_081321.jpg
     
  16. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Sounds ok but is he G3 / unvented registered that's the key as it must be registered with building control etc
     
  17. heliotrope

    heliotrope Plumber GSR

    £600. Way over the top. A rip off.
     
  18. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    what are you charging for a day to day and a half labour then in london?
     
  19. plumworld

    plumworld New Member

    The guy said it would take half a day.
     
  20. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I would say a day also the floor looks very wet
     
  21. Chuck

    Chuck Active Member

    The only way to tell is to get another quote.

    There is no 'right' price for one-off small jobs. The price is what someone competent and qualified is willing to do it for. Even the same person may vary the price they charge for a given job depending on how it fits into their schedule at the time they quote.
     
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  22. Stigster

    Stigster Plumber

    If you've got the room to have an unvented cylinder (as you do already) my advice is to always go with a cylinder. Combi's are great for one bed, one bath situations but any more than that I would almost always recommend keeping or installing a cylinder.
     
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