Resideo V8043E5004 Valve

Valve, Zone, 2 Way Normally Closed, 1/2', 12', Sweat, 24Vac,, 1/2" sweat two-way normally closed quick fit zone valve,hydronic control, 24v, spring return to close, brass body, stainless steel stem, brass seat,18" leads, manual opener, 20 pound maximum closeoff pressure,normally open auxiliary switch, 3.5cv