a: Filter

Water gets pulled through the filter.

b. Circulation Pump

Water is pulled into front of pump and discharged on top or side.

c. Heater

Water flows through heater and heats

d. Flow Switch

Water passes by flow switch causing it to close.

e. Injector

Water flows through injector causing suction in the smaller line (to the ozonator) and continues.

f. Heater Fitting

Heated water flows back into the spa.