Use 25mm fittings in 1” pipe?

Discussion in 'Plumbing and Central Heating' started by locoloic, 23 May 2021.

  1. locoloic

    locoloic

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    Hi all,
    We have a private reservoir with a pump system in the garage that draws water out and up to a loft header tank. This uses the older 1” black plastic pipes.

    we’re getting mains water installed at the reservoir site, so I can connect the pipe in the reservoir to send mains pressure water to the loft tank.

    so, I need to bypass the pump and put a ball valve in. I’m struggling to find 1” full bore ball valves with compression fittings, so I’m wondering if 25mm fittings would work.

    thanks in advance!
     
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    HERTS P&D

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