Scotsman HD22 User Manual page 6

All models of the dispenser have a 3/4" FPT drain fitting at the bottom of the back panel. Connect 19 mm rigid
tubing to this connection, a vent is recommended for most installations. Route the drain tubing to the building drain.
Note: Drain fitting material is plastic. If using copper, sweat the copper tube to copper fitting together before
installing on the dispenser.
Note: Keep PVC solvent away from all plastic parts of the dispenser.
Follow all applicable plumbing codes.
Because the drain tubing will be very cold, insulation is recommenced for the tubing.
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