Booyah45828
Full Access Member
Pipe thread is sealed by the threads being tapered, and you use either thread tape or ptfe sealant on them. If it's truly npt those washers wouldn't work because the taper will keep the shoulder on the plugs from sealing against the filter head. NPT is on the left, your plug is on the right.
Whether it's npt or ORB it doesn't matter as both will seal fine, you just can't interchange the two.
I would check your filter head threads to see what they actually are. They might have included the wrong plugs, or they might actually have a straight thread ORB port.
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Whether it's npt or ORB it doesn't matter as both will seal fine, you just can't interchange the two.
I would check your filter head threads to see what they actually are. They might have included the wrong plugs, or they might actually have a straight thread ORB port.