.5" NPT x Tube 90 Degree Elbow Fitting
Product Overview
Stop chemical leaks at your chlorinator body with the factory-spec 90-degree elbow.
A hairline crack on an off-line chlorinator line introduces air into your pump or drips acidic sanitizer directly onto the equipment pad. The Pentair R172272Z connects 0.5-inch NPT threaded feeder ports directly to standard feeder tubing, sealing off-line and in-line Rainbow series units. Engineered by Pentair from chlorine-resistant polymers, it withstands continuous contact with concentrated trichlor and bromine tablets without cracking or softening prematurely.
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Benefits & What Makes It Different
Direct Rainbow Feeder Fit
Mates 0.5-inch NPT threaded ports with feeder tubing on Rainbow 300 and 320 automatic chemical feeders.
Chemical-Resistant Resin
Molded from heavy-duty polymer formulated to resist embrittlement from direct exposure to concentrated sanitizer.
Equipment Pad Protection
Stops acidic sanitizer drips at the injection point before chemical runoff corrodes pump motors or concrete pads.
Compatibility
- Pentair Rainbow 300 Automatic Off-Line Chemical Feeder
- Pentair Rainbow 320 Automatic In-Line Chemical Feeder
- Standard 0.5-inch NPT chlorinator ports and chemical feed tubing
When To Use This
Pro Tip
Never use pipe dope, thread seal pastes, or petroleum products on these plastic fittings; the chemicals soften plastic polymers and cause stress fractures. Standard PTFE tape gives you a tight seal without chemical degradation.
Common Questions & Instructions
Which chlorinator models use the Pentair R172272Z elbow fitting?
The Pentair R172272Z fitting is engineered specifically for Rainbow automatic chlorine and bromine feeders, including the Rainbow 300 off-line feeder and the Rainbow 320 in-line feeder, connecting the 0.5-inch NPT port to standard feed tubing.
What causes this feeder elbow to fail, and when should it be replaced?
Intense UV exposure and hard water scale buildup accelerate plastic degradation outdoors, while concentrated chlorine weakens standard fittings from the inside. Replace the fitting immediately if you see hairline stress cracks, white mineral crusting at the threads, or chemical weeping.
How do I install the R172272Z elbow without damaging the feeder body?
Wrap the 0.5-inch NPT male threads with 2 to 3 wraps of standard PTFE tape. Thread the fitting by hand into the feeder port, then use a wrench to turn it an additional 1 to 1.5 turns until snug and oriented toward your tubing run. Never overtighten into plastic female ports.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
