Backflow prevention valve ARCO 191106, threaded 1 1/4" F x 1 1/4" F

The ARCO backflow prevention valve 191106 with 1 1/4" female threaded connections is a compact inline device designed to prevent reverse flow and protect potable water systems from contamination. Constructed for compatibility with standard 1 1/4" fittings, this valve installs directly into supply lines and provides mechanical backflow prevention suitable for domestic and light commercial installations where basic protection against back-siphonage or backpressure is required.

Advantages

This threaded backflow valve offers straightforward installation thanks to its female 1 1/4" connections that match common plumbing fittings. Its inline configuration minimizes footprint in supply lines, and the mechanical design provides consistent prevention of reverse flow without the need for external power. The valve is suitable for potable water systems and light commercial use, delivering reliable protection while requiring minimal maintenance when installed according to system requirements.

Suitable for

• Protection of domestic potable water lines against backflow
• Light commercial water supply systems requiring basic backflow prevention
• Inline installation in plumbing runs with matching 1 1/4" female threaded fittings
• Applications where compact, mechanical backflow protection is preferred

Key specifications

• Connection type: female threaded, 1 1/4" x 1 1/4"
• Function: backflow prevention for potable water and compatible fluids
• Mounting: inline installation within supply piping
• Application range: domestic and light commercial water lines
• Design: mechanical valve providing backflow protection without external power

How to use

Install the valve inline in the supply pipe using matching 1 1/4" female threaded fittings and appropriate thread sealant or tape on the mating male threads to ensure a watertight connection. Orient the valve according to the flow direction marked on the body and maintain clear access for inspection. After installation, slowly pressurize the system and check for leaks at the connections. Periodically inspect the valve for signs of wear or leakage and follow local codes for testing and maintenance intervals applicable to backflow prevention devices.

Usage recommendations

Use this ARCO backflow prevention valve in potable water systems with compatible pipe materials and fittings. Do not rely on this valve for high-risk cross-connections that require certified reduced pressure or dual-check assemblies; consult local regulations to determine the appropriate level of backflow protection. Ensure correct orientation, secure threaded connections, and routine inspection to maintain reliable operation.