I'm in the middle of installing my Stenner pump and would like some advice on where to inject the bleach. I assume it is best to inject it after the pump, filter, and heater just before it returns to the pool and spa?
Ideally, yes - after everything on the way back to the pool. Truthfully, probably not a big deal if you plumb it in anywhere. Some people just use the drain port in the side of the pump basket. Chlorine puck dispensers typically suggest installing the injection port after the heater.
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