The ProLine Series 101-105 Check Valve is a high-quality, inline backflow prevention solution designed for residential, commercial, and light industrial plumbing systems. Engineered by B & K Industries, this valve ensures water flows in only one direction, protecting your system from reverse flow that could contaminate clean water supplies or damage equipment.

Constructed from durable white PVC, the valve is lightweight, corrosion-resistant, and suitable for a wide range of water applications. Its 1-inch IPS threaded female connections make it compatible with standard Schedule 40 and Schedule 80 piping systems. The internal spring-loaded stainless steel poppet and neoprene O-ring provide a secure seal and reliable operation under pressure.

Whether you're installing a sump pump, irrigation system, or potable water line, the 101-105 delivers dependable performance with minimal maintenance.

Key Features

• Nominal Size: 1 inch IPS (FIP x FIP threaded ends)
• Body Material: White PVC – corrosion-resistant and lightweight
• Trim Material: Stainless steel spring for long-lasting durability
• Softgoods Material: Neoprene O-ring for tight sealing
• Pressure Rating: Up to 200 PSI at 73°F
• Temperature Rating: Effective operation up to 73°F
• Internal Mechanism: Spring-loaded poppet prevents backflow
• Flow Direction Indicator: Molded arrow on valve body for correct installation
• Compatibility: Fits both Schedule 40 and Schedule 80 PVC piping systems
• Shelf Pack: Available in packs of 8 units
• Safety Notice: Contains Titanium Dioxide, a chemical listed under California Prop 65

Applications

• Potable Water Systems: Prevents contamination from backflow
• Sump Pump Installations: Stops reverse flow into pump basins
• Irrigation Systems: Maintains directional flow to protect pumps and filters
• Water Treatment Systems: Ensures proper flow in filtration setups
• Residential Plumbing: Ideal for inline use in home water lines
• Commercial Plumbing: Suitable for small-scale industrial water systems

Why Choose the 101-105 Check Valve?

• Reliable Backflow Prevention: Spring-loaded design ensures consistent one-way flow.
• Durable Construction: PVC body and stainless steel components resist wear and corrosion.
• Easy Installation: Threaded ends and molded flow indicator simplify setup.
• Versatile Use: Compatible with a wide range of water system configurations.