Pump for pumping air into combi boiler exansion vessel?

Discussion in 'UK DIY' started by Rich, Feb 3, 2005.

  1. Rich

    Rich Guest

    The expansion vessel in my combi has stopped doing its job properly
    after a leaking radiator valve reduced the system pressure to almost
    nothing the other day.

    Last time I found the expansion vessel wasn't doing its job, I managed
    to pump 10psi of air into it, and it then worked perfectly for a few
    months until this latest event.

    This procedure would be easy if I had a suitable (cheap) pump. Any
    suggestions? A car foot pump is out of the question because the
    vessel's valve is about 5 ft above floor level.

    Last time I did it, I had an electric tyre pump which I connected to a
    long wire which I then plugged into my car's fag lighter. But it was
    very tricky because each time I pulled the pump's attachment off the
    valve, the air would escape - and it doesn;t take much air to create
    10psi in the vesel.. And now I don't have a car with a fag lighter!

    I do have a procket pressure guage which can read as low as 10 psi.
    It's just the pump which is the problem.

    Thanks for any suggestions. A battery-operated pump perhaps? Anyone
    know of a cheap one? Someone told me a bicycle pump would work. Is
    that correct?

    Many thanks

    Rich
     
    Rich, Feb 3, 2005
    #1
    1. Advertising

  2. Rich

    Grunff Guest

    Rich wrote:

    > Thanks for any suggestions. A battery-operated pump perhaps? Anyone
    > know of a cheap one? Someone told me a bicycle pump would work. Is
    > that correct?



    Bicycle pump.


    --
    Grunff
     
    Grunff, Feb 3, 2005
    #2
    1. Advertising

  3. Rich

    Set Square Guest

    In an earlier contribution to this discussion,
    Rich <> wrote:

    > The expansion vessel in my combi has stopped doing its job properly
    > after a leaking radiator valve reduced the system pressure to almost
    > nothing the other day.
    >
    > Last time I found the expansion vessel wasn't doing its job, I managed
    > to pump 10psi of air into it, and it then worked perfectly for a few
    > months until this latest event.
    >
    > This procedure would be easy if I had a suitable (cheap) pump. Any
    > suggestions? A car foot pump is out of the question because the
    > vessel's valve is about 5 ft above floor level.
    >
    > Last time I did it, I had an electric tyre pump which I connected to a
    > long wire which I then plugged into my car's fag lighter. But it was
    > very tricky because each time I pulled the pump's attachment off the
    > valve, the air would escape - and it doesn;t take much air to create
    > 10psi in the vesel.. And now I don't have a car with a fag lighter!
    >
    > I do have a procket pressure guage which can read as low as 10 psi.
    > It's just the pump which is the problem.
    >
    > Thanks for any suggestions. A battery-operated pump perhaps? Anyone
    > know of a cheap one? Someone told me a bicycle pump would work. Is
    > that correct?
    >
    > Many thanks
    >
    > Rich


    I would use a car footpump, parked on the platform at the top of a step
    ladder, and operated by hand. You don't need a lot of force for 10 psi - and
    hand-power is quite adequate.
    --
    Cheers,
    Set Square
    ______
    Please reply to newsgroup. Reply address is invalid.
     
    Set Square, Feb 3, 2005
    #3
  4. Rich

    John Guest

    "Rich" <> wrote in message
    news:...
    >
    > The expansion vessel in my combi has stopped doing its job properly
    > after a leaking radiator valve reduced the system pressure to almost
    > nothing the other day.
    >
    > Last time I found the expansion vessel wasn't doing its job, I managed
    > to pump 10psi of air into it, and it then worked perfectly for a few
    > months until this latest event.
    >
    > This procedure would be easy if I had a suitable (cheap) pump. Any
    > suggestions? A car foot pump is out of the question because the
    > vessel's valve is about 5 ft above floor level.
    >
    > Last time I did it, I had an electric tyre pump which I connected to a
    > long wire which I then plugged into my car's fag lighter. But it was
    > very tricky because each time I pulled the pump's attachment off the
    > valve, the air would escape - and it doesn;t take much air to create
    > 10psi in the vesel.. And now I don't have a car with a fag lighter!
    >
    > I do have a procket pressure guage which can read as low as 10 psi.
    > It's just the pump which is the problem.
    >
    > Thanks for any suggestions. A battery-operated pump perhaps? Anyone
    > know of a cheap one? Someone told me a bicycle pump would work. Is
    > that correct?
    >


    I carry in my van a bicycle pump with suitable connector for just this sort
    of operation.
    Don't forget to depressurise the radiator system before pumping up the
    vessel to its design pressure
     
    John, Feb 3, 2005
    #4
  5. Rich

    John Guest

    "Christian McArdle" <> wrote in message
    news:42023b0e$0$19159$...
    >> Last time I found the expansion vessel wasn't doing its job, I managed
    >> to pump 10psi of air into it, and it then worked perfectly for a few
    >> months until this latest event.

    >
    > I would replace the vessel. It should not require regular precharging.


    Well not regularly but you do come across the customer who says I had such
    and such wrong and I thought I'd check for airlocks. I let a lot of air out
    of here but it still won't go <g>
    >
    > Christian.
    >
    >
     
    John, Feb 3, 2005
    #5
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Dave£
    Replies:
    4
    Views:
    3,043
    Ed Sirett
    Oct 25, 2004
  2. Dave£
    Replies:
    8
    Views:
    338
    John Rumm
    Nov 20, 2004
  3. Bruce
    Replies:
    12
    Views:
    876
    Bruce
    Mar 14, 2005
  4. Replies:
    0
    Views:
    181
  5. vic
    Replies:
    6
    Views:
    182
    jamesgangnc
    Mar 8, 2007
Loading...

Share This Page