Devco PI391 Electrical Utility Box Extension Ring 4 inches voomi_id_35489 making it compatible with most

making it compatible with most residential and commercial HVAC systems

Sets ionizer current with jumper P5 for 1

Valve Service 7/8 45 Degrees

This unloader valve is crafted to withstand rigorous use

Simple mounting options available on pipelines or support brackets

Devco PI391 Electrical Utility Box Extension Ring 4 inches voomi_id_35489 making it compatible with mostProduct Description The Devco PI391 is an Electrical Utility Box Extension Ring designed for various electrical applications. This extension ring measures four inches in length and two hundred one point seven inches in width, making it suitable for standard utility box installations. With a depth of one and one half inches, it provides ample capacity of twenty one cubic inches for wiring and connection purposes. Knockout sizes: three fourths inches