Annual Maintenance Kit, HI 320 (Combu Filter)

We recently changed our preheaters for MX, XT and LS units. Find the right maintenance kit for your heater. This kit is for preheaters purchased BEFORE August 2026.

Gasket (2), Kit Cleanout Door HI320 (1), Pump Strainer Kit A Pump Screen (1), Kit Ignitor One Piece (1), Coupler Pump A1RA (1), Kit Strainer Oring Combu (1), Nozzle Kit Asem HI120/240/320 (1)
Combu Filter has a single bolt down through the center that holds the canister together.