Watts LFN45B Series 1" Lead-Free Cast Copper Silicon Alloy Water Pressure Reducing Valve, NPT Thread Union Inlet x NPT Female Outlet, Elastomer Disc, Adjustable Pressure 25 to 75 psi, Maximum 400 psi

The Watts LFN45B Series is a 1-inch Lead-Free Water Pressure Reducing Valve designed for commercial, industrial, and residential plumbing systems. It features a body constructed from lead-free cast copper silicon alloy for durability and compliance with lead-free standards. The valve is engineered to reduce incoming high water pressure to a safer, adjustable level, protecting pipes, fixtures, and appliances from damage while also helping to reduce water consumption. It offers an adjustable pressure range from 25 to 75 psi, with a factory default setting of 50 psi, and can handle maximum inlet pressures up to 400 psi. Key components include a removable integral stainless steel strainer to protect the valve from debris, a replaceable thermoplastic seat module for easy maintenance, and a thermal expansion bypass. This bypass feature allows water to flow back toward the main supply when pressure on the outlet side increases due to thermal expansion (such as from a water heater), preventing excessive pressure buildup in the system. The valve has a sealed spring cage with stainless steel screws, making it suitable for installations in waterwork pits. It features a union inlet with NPT threads and a female NPT outlet, facilitating straightforward installation and allowing for in-line serviceability—meaning the valve can be serviced or repaired without being removed from the pipeline. This valve is part of the product line from Watts Water Technologies, a company specializing in water safety and conservation solutions.