Watts ACV114 Check Valve 1-1/4 Inches Fnpt Low Lead

Product Description

The WATTS ACV114 is a 1-1/4-inch spring-loaded check valve designed for inline flow control in plumbing and HVAC piping systems. The body is constructed from glass fiber reinforced nylon, making it lightweight and resistant to corrosion in both water and light chemical service applications. The valve features a combination thread profile that accepts both NPT and BSP connections, and its spring-loaded mechanism allows installation at any angle without requiring a specific orientation. Low lead compliance makes it suitable for potable water installations where lead content restrictions apply. A nitrile rubber O-ring provides a reliable seal, and the valve is fully serviceable in the field.

This check valve is suited for residential and light commercial plumbing, hydronic heating systems, and water treatment installations where backflow prevention is required on a 1-1/4-inch line. The combination NPT and BSP thread compatibility makes it a practical choice in mixed-thread piping environments or retrofit situations. Its serviceable, reusable design reduces replacement costs over time, and the non-corrosive nylon body handles wet service conditions without degradation. Licensed plumbers and HVAC technicians install this type of valve on domestic water, glycol, and similar fluid systems.

Key Features

• Glass fiber reinforced nylon body resists corrosion in wet service applications
• Spring-loaded design allows installation at any angle, including vertical downflow
• Combination thread accepts both NPT and BSP pipe connections
• Low lead compliant for use in potable water systems
• Fully serviceable and field-disassembled without replacing the valve body
• Nitrile rubber O-ring provides a durable, reliable seal

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1-1/4-inch FNPT plumbing and hydronic piping systems requiring backflow prevention and low lead compliance.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the applicable local plumbing code and IPC guidelines. Shut off the water supply and relieve system pressure before removing or installing the valve. Thread sealant compatible with the pipe material and fluid type should be applied to male threads before making connections. Do not overtighten threaded connections into the nylon body, as excessive torque can crack the fitting.

Technical Specifications

• Nominal Size: 1-1/4 inches
• End Style: FNPT
• Thread Compatibility: NPT and BSP
• Body Material: Glass Fiber Reinforced Nylon
• Seal Material: Nitrile Rubber O-ring
• Low Lead Compliant: Yes
• Weight: 27 pounds
• Unit of Measure: EA
• Package Quantity: 50

Standard Information

• Brand: WATTS
• Manufacturer Part Number: ACV114