Why it matters
The Pentair Rainbow 300 In-Line Chlorinator is an in-line chlorine feeder that dissolves trichlor tablets at a rate set by its dial.
Install it after the filter and any heater so concentrated chlorine doesn't pass through equipment it can corrode. Tablets add stabilizer (CYA), so test it through the season.
The listing gives dimensions of 14.75 x 22.25 x 23 inches and a weight of 3 pounds.
Who it's for, and who should skip it
Good fit if
- Tablet-chlorinated pools
Look elsewhere if
- Salt pools
- Placing ahead of a heater
Pros and cons
Pros
- Steady chlorine between tests
Cons
- Install after the heater
- Tablets raise CYA over time
Limitations to weigh
- Specifications are the maker's or seller's own; check fit against your equipment's manual and part numbers.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Dimensions (seller) | 14.75 x 22.25 x 23 inches | Retailer |
|---|---|---|
| Product weight | 3 lb | Retailer |
| Model number | R171016 | Retailer |
Alternatives worth comparing
More chlorinators and feeders we cover
- MAYGO CL110 Off-Line Chlorinator
- MAYGO CL220 Off-Line Chlorinator
- LONGADS CL220 Off-Line Chlorinator
- Yhaofu CL220 Off-Line Chlorinator
All chlorinators and feeders, compared in one table · Every Pentair product we cover
Final verdict
A practical in-line chlorinator for tablet-chlorinated pools.
Where to buy
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