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Do an Fuel fittings need sealant?

The thread type for a pre-fuel filter is usually NPT or NPTF, it requires sealant around the threads. Is this true? Fuel filters, pumps, tank connections, and other items come with female NPT or NPTF ports.For most components, such as a prefuel filter (a.k.a. fuel water separator), the type of wire is usually NPT or NPTF and requires sealer around the wires. Most fuel filters, pumps, tank connections, etc., come with NPT or NPTF women's ports.

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