Penn Plax Non-return Valve - Protect Your Air Pump Against Water Damage

 PENN PLAX
 NON-RETURN VALVE
 
 Supply clean air to your aquarium
 Protect your air pump against water damage Insert non-return valve in tubing leading from pump to the aquarium. Used correctly, it will prevent water from flowing back from the aquarium into your air pump in the case of a power failure. 
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