You will not lose any pressure with the 3" diameter hose
the inside layer of the hose is lined with either EM or black rubber liner
Fully lined with rubber on the inside
Pipe adapter is a length of straight or tapered pipe with male or female threads on both ends
Service Pressure - 400 psi
1.5" NST (NH) Male Hose x 1.5" NPSH Male Pipe Adapter DMH15F15F You will not lose anyChange Threads From 1. 5" NST (NH) Fire Hose To 1. 5" NPSH Pipe Hex Simply screw it on, and you're ready to go. The NST (NH) side of the adapter will allow you to connect the female end of your fire hose. The NPSH side of the adapter can hook into NPSH, PVC, NPS, NPSM, NPSC, IPS, IPSM, IPT, SIPT, MIP, MPT. Specifications 1. 5" NST (NH) Male x 1. 5" NPSH Male Full Brass NST (NH) National Standard Thread (National Hose) NPSH National Pipe Straight Hose