How to replace cartridgeCreated OnJuly 4, 2024Last Updated OnJanuary 26, 2026byAva Campbell You are here: Main Shower Panels 392M/392B/392H/392R/331B How to replace cartridge < All Topics When inserting, make sure the blue part is facing up Also, ensure that the tip of the cartridge from the other end is fully inserted into the socket Make sure the cartridge is fully inserted into the valve