| Description This Non-return valve (NRV) is a useful element for any air bubbler system. This will prevent the siphoning action and thereby increase the life of your air pump used for bubbling. This allows air to flow in only one direction. A non-return valve is fitted in any air bubbling system to ensure that a medium flows through a pipe in the right direction, where pressure conditions may otherwise cause reversed flow (or the siphoning). |
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