Caleffi 304840A FlowShield® DuC Dual Check Backflow Preventer, 1/2″ NPT Male Union, ASSE 1024, Lead-Free

Description

The Caleffi 304840A is a FlowShield DuC dual check backflow preventer with a 1/2 in NPT male union connection, certified to ASSE 1024 for low-hazard residential and commercial potable water protection.

Product data compiled from Caleffi North America technical documentation. Last reviewed July 2026.

FunctionDual Check Valve