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  1. ConfusedDIYer

    ConfusedDIYer New Member

    Hi, I am looking for some advice about the central heating system in a house I have recently purchased. I am not at all educated on hearing systems or plumbing so please be gentle...

    The house has a Combi-boiler in the kitchen, it has a hot water tank upstairs and a small water tank and a larger water tank in the loft.

    My understanding was that with a Combi boiler there was no need for a hot water tank. The system in the house seems to use the hot water tank. I only noticed as there is some water hammer from some piles and looked around the system in the loft and the hot water tank seems to be connected to the Combi system.

    Is this normal, can this cause problems? There hot water is low on pressure and there is water hammer so unsure if this is linked to the hot water tank.

    Thanks for any help!
    T
     
  2. scott_d

    scott_d Plumber GSR Top Contributor!!

    What boiler is it?
     
    • Agree Agree x 1
  3. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Might not be a combi.
     
  4. ConfusedDIYer

    ConfusedDIYer New Member

    It Oscar a GlowWorm Ultimate 30BF, 40BF, 50BF and 60BF. Not sure which of those but that is what it says on the old leaflet with the boiler so it may not even be a Combi?
     
    • Funny Funny x 1
  5. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Not a combi

    Will be an open vented heat only boiler
     
  6. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Which will be using the tanks in the loft.
     
  7. ConfusedDIYer

    ConfusedDIYer New Member

    Thanks for the quick reply.
    So I take it the boiler is only for the radiator is and the hot water tank is for hot water only? There is a digital screen below the boiler which shows hot water and central heating... very confused

    There is an electric switch within the airing cupboard which I have had off since I moved in but I have still had hot water, but at very low pressure? Anyone know what that switch is?

    In relation to the reason I was in the loft, water hammer, some pipes are not secured up their, it is simply enough to secure the pipes?
     
  8. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    The boiler does both. But it heats the water in the cylinder that is situated in your airing cupboard by 2 pipes connected to a coil inside the cylinder.

    The switch in the airing cupboard is for the immersion heater. It is basically a backup.

    Edited as not finished before I posted
     
    • Agree Agree x 1
  9. snowhead

    snowhead Well-Known Member

    Immersion heater to heat the hot water cylinder independant of the boiler.
     
    • Like Like x 1
  10. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Boiler heats the radiators also heats a coil inside the hot water cylinder

    You can control this via the programer below the boiler

    The switch will be for the immersion heater inside the cylinder (only for back up incase the boiler breaks)

    Yes just pipe clips maybe the ball valve that fills the tank is old and needs replacing
     
    • Agree Agree x 1
  11. ConfusedDIYer

    ConfusedDIYer New Member

    Thank you so much for the replies! You have all be extremely helpful to a complete amateur! Genuinely a big thank you.

    The pressure for the cold water is good but the pressure for the shower is not great. What is the best way to increase the pressure for the shower? I have Googled for hours but now I have an odd water/heating system I am unsure what is best?
     
  12. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Common system tbh

    And two options (well three)

    One rip the existing system out and install a combi boiler

    Two install a shower pump

    Three install an electric shower
     
  13. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    A combi boiler is a good idea. But can be an expense not needed when just moving in. Also a combi depends on a number of factors I.e size of house/number of bathrooms/showers and how many radiators.

    A stewart turner shower pump is a very good idea. Normally the most preferred method by customers. What space have you got in the airing cupboard? And how big is the big tank in the loft that feeds the cylinder in the airing cupboard?
     
  14. ConfusedDIYer

    ConfusedDIYer New Member

    The airing cupboard has a good bit of space. The loft has two water tanks, a smaller one and a much larger one though I’m not sure what litre.
     
  15. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    From what I remember, On most pumps the big tank needs to be a minimum of 50 litres. But I could be wrong
     
  16. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    50 gallons (220L)
     
  17. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    My bad I meant gallons not litres. You wouldn’t get much shower time with 50 litres. Thanks for the correction Shaun, told you I was tired.:p:p:p Ps I know that some shower pumps are fitted on smaller tanks.
     
  18. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    :D kids running you ragged

    And yes it's key that the mains can keep up if less don't want it running dry
     
    • Funny Funny x 1
  19. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Just a long day mate.
     
  20. ConfusedDIYer

    ConfusedDIYer New Member

    In the airing cupboard there are already two things connected to pipes. One is a Siemens Actuator and the other is a Grundof Selector. I take it these are nothing to do with the shower and having a Stuart Turner pump won’t affect these things?
     
  21. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Nope. Should be for the boiler.
     
  22. ConfusedDIYer

    ConfusedDIYer New Member

    Gents, you have been terrific! Absolute treasure to your profession! Thank you.

    So I need to have the pipes secured to stop the awful banging and get a Stuart Turner pump fitted for the shower pressure.

    Gents, thanks you so much!
     
  23. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Does not have to be Stuart turner mate. But they are the dogs b******s in my professional opinion.
     
  24. ConfusedDIYer

    ConfusedDIYer New Member

    And your professional opinion is what I shall be following! Haha
     
    • Funny Funny x 1
  25. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Thanks. :p:p:pI’m going to print that out and stick it to my office wall. :p:p:pIt is good to get some feed back. We don’t get it that often.
     
    • Funny Funny x 1
  26. finchy01

    finchy01 Plumber GSR

    More or.less echoing the others. You're system is still pretty common. The boiler heats water, depending on what the digital display below the boiler is asking for determines where that hot water goes. Central heating? It leaves boiler goes through your grundfos selector then through your Siemens actuator and then to your radiators. Hot water? Same process but goes to the cylinder in your airing cupboard. When you use hot water or flush a toilet the water comes from the big tank in your loft. If the hammer is then, clip pipes, if it still happens replace the ball valve inside that big tank. Of it happens when you run you cold tap in the kitchen though it is .pat likely a problem with you main stop tap (stopcock) ehich is 'normally' and old fashioned looking brass tap under the kitchen sink. As far as the shower pump goes, I have used salamander and they have always been good too. Often a cheaper option as that boiler may well not have a huge amount of time left before it needs to go to live on a special farm for old boilers!

    If you've only just moved I I would suggest getting a gas safe engineer (lots of people still know us as corgi registered) and get your boiler serviced and ask them to have a look around your system to check it over and show you about.
     
  27. SimonG

    SimonG Trusted Plumber Top Contributor!!

    Or could fit an unvented cylinder dependant upon pressures and flows.
     
    • Like Like x 1
  28. finchy01

    finchy01 Plumber GSR

    That's a good shout as that would mean new boiler would hopefully be a fairly inexpensive replay cement when due and would give you great pressure on hot straight away. Just be sure the engineer is G3 qualifies and get them to have a glance over the system first as often older toilets and taps can't cope with the increase in pressure.
     
  29. SalamanderPumps

    SalamanderPumps New Member

    We would be happy to help you to identify which shower pump would be required for this job, we can also give you the contact details for plumbers in your area who can install the pump for you. Please give our technical team a call on 0191 516 2002.
     
  30. SimonG

    SimonG Trusted Plumber Top Contributor!!

    If you go down the pump route use a Stuart Turner pump.
     
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