Staff Answer
May 11, 2026 - 02:20 PM
The Pentair Rainbow #320 Chlorinator Body Only (R172321) uses 2-inch fittings to connect to the return pipe. It also supports 1½-inch pipe using the reducer bushings included in the box.
What is the size of the fitting Pentair R172321 #320 Chlorinator Body Only Pool & Spa Equipment
What is the size of the fitting that goes onto the return pipe
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Open May 11, 2026 - 02:20 PM
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Pentair R172321 #320 Chlorinator Body Only
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