PRODUCT APPLICATIONS
Plastic one way non-return check valve suits most aquariums, fish tank scenes, and fishing tackle shops, especially those equipped with 3/16" air tubes. It can also be used in oxygen pumps to prevent water back-suction.

PRODUCT DETAILS & INCLUDE
√ Material: PVC
√ Color: Clear Red
√ Overall Size: 50 x 14 mm / 1.97" x 0.55"(L x W)
√ Air Hole Diameter: 4.5 mm/0.18"
√ Applicable Pipe Size: 3/16"
√ Package Includes：24-Pack x One Way Air Valve

PRODUCT ADVANTAGES
1. Our air tube check valve for aquarium air pump is made of PVC, which is durable and not easy to break. With corrosion-resistant silicone, soft and wear-resistant and can ensure long-term use. Its design can be tightly connected to the hose without air leaking, and it will not make noise during long-term use.
2. The check valve aquarium has a reliable protection function, effectively preventing water backflow in the pipe and protecting your air pump.

ATTENTION
There is a small arrow on the main body of the product, the head of the arrow is an air outlet, and the tail end is an air inlet. If no air is found, check whether the installation sequence is correct. If the check valve is blocked or the airflow is not smooth, you can poke the blockage from the air intake side.