Tapered thread pipe and JIC 37° flare fittings are the two most common types of fittings that generally rank poor for reusability. Feb 5, 2016.

MPT (aka MIP) - Male pipe thread (aka Male Iron Pipe). The male gender of NPT. All of the above are all the same thing and used for both iron pipes (both water and gas) and plastic PVC/CPVC fittings.

For plumbing fittings or pipe assemblies, snug the parts by hand and then use a wrench to finish. The additional amount of tightening with a wrench is known as turns past finger-tight or turns ...