It is only required for units manufactured prior to the Fall of 2004 that still utilize the original 4-pipe piping layout

improper tuning can shorten element life

The Mueller W04084 1-5/8" Tee is a professional-grade wrot copper fitting engineered for high-performance branch connections in HVACR systems and potable water lines

safeguard cover

ensuring reliable performance in demanding commercial and industrial heating applications

Watts 0780318 Stem R-448A It is only required forThe Watts 0780318 is a heavy duty 10 inch float valve stem engineered for high capacity water flow control in commercial, industrial, and agricultural environments. This genuine Watts KSTEM 11 series component is constructed from industrial grade brass, ensuring structural integrity in high temperature applications up to 9999 F. Featuring a 1 4" outside diameter (OD) and precision cut 1 4 20 NPT threaded ends, this stem provides a secure, rigid