Upgraded Check Valve 4 Pack

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These check valves are heavier duty and a bit bulkier than the default check valves included with your dosing pumps. These are recommend if you have longer dosing lines with more t han 3.5 feet of head height, or if you are dosing certain trace elements that are less viscous and have trouble keeping a prime with the default check valves. This listing is for (4) pcs check valve. Show more