A special handle and labeling ease identification of True Union Z-Ball valves for sodium hypochlorite service. Available in PVC for sizes from 1/4 to 3/8 in. and PVC or CPVC in sizes from 1/2 to 6 in., the valves have a visibly identifiable black handle that makes them easy to spot and special labeling that identifies their use for sodium hypochlorite applications in a plant environment. The valve's specially drilled Z-Ball design keeps inner valve surfaces constantly vented to eliminate gas accumulation and wetted to prevent crystallization of salts, which can "freeze" the valve and make it inoperable. The valve's "true union" design also makes it easy to maintain by unscrewing the two assembly nuts on each end and lifting the valve body from the piping line.