Watts 0342692 M335M2 3/4″ MxF 30 PSI Hot Water Relief Valve

The Watts M335M2 is a 3/4″ Male x Female (MxF) hot water relief valve rated at 30 PSI, engineered to provide reliable overpressure protection in residential and light commercial hot water and hydronic heating systems. Designed and built to Watts’ exacting quality standards, this relief valve automatically opens to discharge excess pressure before it can damage system components, piping, or connected equipment.

Key Features

• 3/4″ Male x Female (MxF) connection for straightforward inline installation
• 30 PSI pressure relief setting for precise overpressure protection
• Compact, durable construction suitable for residential and light commercial hydronic applications
• Automatic pressure relief operation — opens on overpressure, reseats when pressure normalizes
• Built to Watts’ industry-leading quality and performance standards

Specifications

• Brand: Watts
• Model: M335M2
• SKU: 0342692
• Connection Size: 3/4″
• Connection Type: Male x Female (MxF)
• Relief Pressure Setting: 30 PSI
• Application: Hot water and hydronic heating systems

Application

The Watts M335M2 is ideal for protecting hot water heating systems, boilers, and hydronic distribution circuits from dangerous pressure buildup. Its 3/4″ MxF configuration allows for easy integration into existing piping without the need for additional fittings, saving time on installation and reducing potential leak points.