Seller notes

New Four Seasons manual heater valve. This valve is for 3/4" ID heater hose. This valve would be spliced in one of your heater hoses to prevent coolant from flowing through the heater core. Blocking your heater core flow will provide better A/C cooling on vehicles not equipped with a heater core bypass valve. This is a manual valve, meaning you need to turn the valve open and closed by hand as needed. This can also be used to block off a leaking heater core, however, 2 valves are required to sto...

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