Check valve

Performance & sizing

Core numbers for matching this unit to your tank and electrical plan.

Power

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Flow rate

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Noise

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Dimensions

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Price range

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Tank fit (L)

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Consumables & maintenance

Rinse mechanical media on a regular schedule; replace biomedia and cartridges per the manufacturer (often many months apart).

Description

A check valve is a one-way fitting that prevents water from siphoning back into your air pump or CO2 system during a power outage. It is a cheap and essential safety device for any setup with equipment below the water line. Install it as close to the pump as possible.