These ANSI 250 valve bodies (400# @ 1500F, 250# @ 2500F) are 3-way diverting 4 port valves with built-in tee (piped as mixing valve it can be used for 5 psi maximum differential pressure.) V420 is a 1/2" compression nut or 15 mm comisa fitting valve body and V425 is 1/2" direct solder valve body. Designed for use on hot or chilled water and up to 50% glycol mix, the commercial application valve bodies utilize low zinc antidezincification bronze, coupled with long life replaceable and interchangeable internals 1.0, 2.0, 3.0, 3.5 Cv (0.86, 1.70, 2.60, 3.00 KV’s).