Should you use pipe thread-sealing compounds on the seats of brass flare fittings?

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Prepare for the Maine Propane Tank Setter Test. Study with flashcards and multiple-choice questions, each accompanied by hints and explanations. Ace your exam with confidence!

Multiple Choice

Should you use pipe thread-sealing compounds on the seats of brass flare fittings?

Explanation:
The essential idea is that flare fittings seal with their flare seating surfaces, not with the threads. The nut tightens the flare to create a metal-to-metal seal, so applying pipe-thread sealant to the seating area would contaminate the surfaces and prevent proper sealing. For propane installations, no sealant belongs on the seats of brass flare fittings; assemble to spec and verify with a leak test.

The essential idea is that flare fittings seal with their flare seating surfaces, not with the threads. The nut tightens the flare to create a metal-to-metal seal, so applying pipe-thread sealant to the seating area would contaminate the surfaces and prevent proper sealing. For propane installations, no sealant belongs on the seats of brass flare fittings; assemble to spec and verify with a leak test.

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