Caleffi 304040A Vacuum Relief Valve 1/2 Inch MNPT

Product Description

The Caleffi 304040A is a 1/2 inch MNPT vacuum relief valve. This valve functions as a vacuum breaker for domestic water systems. It allows air to enter the piping, preventing vacuum conditions that can pull water and harm equipment.

• Complies with ANSI Z21.22 and CSA 4.4 standards.
• Ideal for hot and cold water storage tanks.
• DZR low-lead brass construction.

Product Highlights

Protection against vacuum conditions for water heaters and supply tanks.

Product Information

Standard Information

• Brand: Caleffi
• MPN: 304040A

Technical Specifications

• Medium: Water, low pressure steam
• Max. working pressure (water): 200 psig (14 bar)
• Max. working pressure (steam): 15 psig (1 bar)
• Working temperature range: 32 - 250 degrees F (0 – 120 degrees C)
• Vacuum relief opening pressure: 0.3 inches Hg (1 kPa) vacuum
• Relief capacity: 4.5 CFM @ 2 inches Hg (130 lpm @ 7 kPa vacuum)
• Size: 1/2 inch
• Application: Water, Steam
• Material: Brass
• Connection Type: MNPT
• Maximum operating pressure: 200 psi
• Medium temperature range: 32 – 250 degrees F