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Help identifying brass fitting in flow from boiler

Discussion in 'Plumbing and Central Heating' started by cliffa, 30 Aug 2017.

  1. cliffa

    cliffa

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    Hi, I'm going to replace my CH pump. Whilst doing that I wondered what this fitting in the flow pipe from boiler was and what it is for and whether it would be worth replacing whilst the system is drained, it looks to have some seepage.

    Many Thanks

    20170830_144730.jpg
     
  2. 45yearsagasman

    45yearsagasman

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    Hard to tell from the close up, but it does look like an anti gravity valve. Used on older gravity systems to prevent circulation to rads during warmer weather.It opens to allow flow through it when pump is on. I'd remove it and clean it up and repair leaks whilst the system is drained.
     
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  4. Terrywookfit

    Terrywookfit

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    Yep...Midbrass Dumball valve.
     
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  5. cliffa

    cliffa

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    Thanks guys, further investigation with a mirror reveals an arrow pointing up, right way round :) containing a letter E. So an anti gravity valve it must be. As the rads upstairs do get warm in summer without shutting them off I can deduce it is stuck, not surprising after this time. I'll have to find a replacement. Cheers
     
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