Description
Mueller Industries A15504-150 Relief Valve Overview
The Mueller Industries A15504-150 is a 150 PSI-rated relief valve designed to protect refrigerant and fluid systems from dangerous overpressure conditions. Featuring a 1/2″ NPT inlet and a 5/8″ flare outlet, this valve offers versatile connection options suited for a wide range of HVAC and refrigeration applications. Mueller Industries is a trusted name in the industry, known for manufacturing high-quality valves and fittings built to last.
Key Features
- 150 PSI pressure relief rating for reliable overpressure protection
- 1/2″ NPT inlet connection for easy installation into standard pipe systems
- 5/8″ flare outlet connection for secure, leak-free refrigerant line hookup
- Durable construction from Mueller Industries — a trusted HVAC and plumbing valve manufacturer
- Designed to vent excess pressure and safeguard system components
Specifications
- SKU: A15504-150
- Brand: Mueller Industries
- Pressure Rating: 150 PSI
- Inlet Connection: 1/2″ NPT
- Outlet Connection: 5/8″ Flare
- Valve Type: Relief Valve
Applications
- Refrigeration and HVAC system overpressure protection
- Refrigerant line installations requiring NPT-to-flare connections
- Commercial and residential HVAC equipment







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