Description
Mueller Industries AG18356 Pressure Regulating Valve Overview
The Mueller Industries AG18356 is a heavy-duty pressure regulating valve (PRV) engineered to deliver consistent, reliable downstream pressure control in demanding HVAC, plumbing, and mechanical system applications. Rated at 350 PSI, this valve is built to handle high-pressure environments while protecting downstream equipment and piping from pressure surges and overloads.
Key Features
- 350 PSI maximum pressure rating for robust, high-pressure system compatibility
- 1/2″ x 1/2″ connection size — compact and versatile for a wide range of installations
- NPTFE (NPT Female External) inlet x NPTFI (NPT Female Internal) outlet thread configuration for secure, leak-free connections
- Manufactured by Mueller Industries, a trusted name in precision valve and flow-control products
- Designed to automatically reduce and regulate incoming supply pressure to a safe, stable downstream level
- Durable construction suited for commercial and residential HVAC, hydronic heating, and plumbing systems
Specifications
- SKU: AG18356
- Brand: Mueller Industries
- Pressure Rating: 350 PSI
- Inlet Connection: 1/2″ NPTFE (NPT Female External)
- Outlet Connection: 1/2″ NPTFI (NPT Female Internal)
- Valve Type: Pressure Regulating Valve (PRV)
Applications
- HVAC hydronic heating and cooling systems
- Commercial and residential plumbing pressure management
- Mechanical rooms requiring downstream pressure regulation
- Water supply systems with elevated inlet pressures







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