Honeywell Valve,Zone, 2 Way Normally Closed, 3/4′, Sweat, 24Vac,, 3/4″ 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, 8 pound maximum closeoff pressure,normally open auxiliary switch, 8 cv