Retard Chamber

The Reliable Model S1 Retard Chamber is designed for use with Reliable Model E and E3 alarm valves in wet fire sprinkler systems that are prone to pressure fluctuations.

Constructed from stainless steel and rated to 300 psi (20.7 bar), the chamber functions as a temporary reservoir, ensuring that short-term pressure surges—such as those caused by supply line fluctuations—do not trigger false alarms.

It delays activation of the alarm pressure switch or water motor alarm until the chamber fills. Once water flow stops, a restricted orifice fitting allows the chamber to drain over approximately three minutes, resetting the system without manual intervention.