The Continental B-1201 NH3 Fill Valve is a rugged, high-flow manual shutoff valve designed for applicator and nurse tanks, featuring a 1-1/4" Male Pipe Thread (MPT) tank connection, a 1-3/4" Acme outlet for filler or liquid/vapor withdrawal, a built-in excess flow check assembly with a 42 GPM rating, and a ductile iron body for durability. It also includes a stainless steel stem and spring-loaded Teflon stem packing for a positive seal at pressures up to 400 psi.