With a 131" outside diameter (128" nominal inside length)

these parts are technically identical and serve as direct replacements for one another in all documented Lennox applications

if water is weeping from the valve stem into the power head

making it suitable for hot water and steam applications

designated with an L160-50 setting

Resideo AM101-UP-1LF Valve 319825-402 With a 131" outside diameterThe Resideo AM101 UP 1LF is a professional grade 3 4 inch Union Sweat thermostatic mixing valve designed for precision temperature control in domestic water applications. This lead free mixing valve features a high performance thermostatic element that maintains a stable outlet temperature by proportional monitoring of hot and cold potable water inputs. Built for reliability in residential and light commercial plumbing systems, the AM1 Series utilizes