Brass Sprinkler System Extension Nipples - 1-1/2 x 1/2 IPS

Shower Nipple depth issues, threads aren't deep enough. : r/Plumbing

Brass 1 1/2 Pin Rack Nipple

Compression Dresser Fittings – Law Supply, Inc.

Pace Supply Pipe Clamp, 1-1/2 in Pipe, 1-7/8 in OD, Low Carbon Steel

Pace Supply Hex Extension Nipple, 1/2 in IPS, 1/2 in L, Brass

STZ Industries 1/2 in. MIP each X 1/2 in. D MIP Galvanized Steel 7 in. L Nipple - Ace Hardware

Sprinkler Head Extension, Brass

Brass Sprinkler Extensions These Brass Sprinkler Extensions, machined from a single piece of solid brass, extend the distance between a fire

Sprinkler Head Extension, Brass

JMF Company 1/4 in. MPT X 1/4 in. D MPT Brass Nipple 3 in. L - Ace

Fire Protection Plumbers Supply Co