Cash-acme 24797-0030 Pressure Relief Valve 30 Psi

Product Description

The CASH-ACME 24797-0030 is an ASME-rated pressure relief valve designed for hot water space heating boilers, water supply heaters, and storage tanks. Built around a full brass body with brass internal components, a silicone seat disc, and a stainless steel pressure spring, this valve provides reliable overpressure protection in compact installations. The factory-set relief pressure is 30 PSI, and the valve carries a capacity rating of 510,000 BTU/h. It is sized at 0.75 inches with a male iron pipe (MIP) inlet and female iron pipe (FIP) outlet. Licensed plumbers and HVAC service technicians install this valve as a required safety device on hydronic heating systems.

This valve is suited for residential and light commercial hot water heating applications, including forced hot water boilers and storage tank water heaters. It is approved for hot water service only and must not be installed on steam systems. The 0.75-inch MIP x FIP configuration fits standard boiler tapping sizes common in residential hydronic systems. Its inspector-friendly design simplifies code compliance verification during rough-in and final inspections.

Key Features

• ASME-rated safety relief valve for hot water heating systems
• All brass body and internal parts with a silicone seat disc for corrosion resistance
• Stainless steel pressure spring for long-term set-point stability
• Factory preset at 30 PSI relief pressure
• 510,000 BTU/h capacity rating
• 0.75 inches MIP inlet x FIP outlet for standard boiler tapping compatibility

Compatibility

Designed for use on hot water space heating boilers, water supply heaters, and storage tanks rated for hot water service. Not approved for steam applications. Available in 0.75-inch size only.

Installation Notes

Installation of pressure relief valves on hot water boilers and water heaters must comply with local plumbing codes and ASME requirements. Shut off the boiler or water heater and allow the system to cool and depressurize before removing an existing valve or installing this one. The discharge port must be piped to a safe drain location in accordance with applicable codes — never capped or plugged. This work is typically performed by a licensed plumber or HVAC technician.

Technical Specifications

• Relief Pressure Setting: 30 PSI
• Capacity: 510,000 BTU/h
• Inlet Connection: 0.75 inches MIP
• Outlet Connection: 0.75 inches FIP
• Body Material: Brass
• Internal Parts Material: Brass
• Seat Disc Material: Silicone
• Spring Material: Stainless Steel
• Length: 4.75 inches
• Width: 2.7 inches
• Height: 1.54 inches
• Country of Origin: United States

Standard Information

• Brand: CASH-ACME
• Manufacturer Part Number: 24797-0030