See all products of Completion codes for heat interface units with electronic regulation Filling loop with CB type backflow preventer. Hydraulic backplate. Mounting template with shut-off valve. Insulation for code 789023. System flushing valve with manual bypass control. Ball shut-off valve kit for secondary circuit for SATK20/30 with electronic regulator. System flushing valve with manual bypass control. Insulation for code 789110. Differential pressure control valve. Outside temperature probe for SATK22 and SATK32. Drain conveyor pipe for SATK32.