Brass Spring Check Valve he mea hanga mai i te parahi hangai, e kiia ana ko te kore-return valve, i hangaia hei whakahaere i te rerenga whakamuri o te punaha whakahaere wai, ka tukuna te wai e te kōpae me te rere ki te huarahi kotahi, e whakamahia nuitia ana mo te paipa, te pupuhi, me te paipa.