If your water heater has extra-thick insulation requiring a longer shank (the 'L' or 'LL' designations)

the 33F38 Lennox TXV represents a reliable solution for correcting common issues like high superheat or starved coils

the unit includes a dustproof steel case and specialized screw terminals with “ears” to securely grip both solid and stranded wiring

Precise Regulation: Factory-set to 4" WC (Water Column) to maintain steady-state natural gas pressure for optimal burner performance

Broad Compatibility: Drop-in replacement for Hydrotherm part number 03-7117 and compatible with major series like HI-B and ID-A

Trane WIR0437 Wiring Harness 323613-751 If your water heater hasWIRING HARNESS