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Check Valve Placement

Discussion in 'CO2 Enrichment' started by Nick72, May 20, 2019.

  1. Nick72

    Nick72 New Member

    May 20, 2019
    Likes Received:
    Local Time:
    10:40 AM
    I'm planning to setup a dual stage regulator with a plug-in bubble counter? which has a built-in check valve (C02 Art Pro Elite).

    This gives me a single check valve immediately after the needle valve, but nowhere else.

    Should I put an inline check valve on the diffuser or on the line coming out of the aquarium?
  2. shoggoth43

    shoggoth43 Lifetime Charter Member
    Lifetime Member

    Jan 15, 2009
    Likes Received:
    Local Time:
    3:40 AM
    You can place one up by the tank if you’d like but you really just want to keep any potential liquid out of the needle valve/solenoid. For most people that will mean between the bubble counter and needle valve. If you use a check valve with a low cracking ( activation ) pressure you could use a few in multiple places but it’s not really needed except maybe aesthetics if your bubble counter tends to fill up with tank water.

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