I used this plug when converting from a single line to a dual line setup. The return line on the Beckett AFG oil furnace needs this plug installed to block the path inside the pump, and instead sends it out the return line back to the tank. The result is automatic air removal from the lines and no need to prime the pumps constantly.
Newtofueloilguy
Dayton, OH
6 years ago
Verified Buyer
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