The OEM Pentair R172214 Rainbow Lock Ring is a genuine replacement part engineered for use with Pentair Dynamic Series I, II, and III inline cartridge filters, as well as select chemical feeders, leaf traps, and Predator II models. It features a durable buttress thread design that ensures a tight and secure fit, helping to maintain the integrity and leak resistance of pool filtration and chemical systems. Commonly used with Rainbow high-capacity automatic chemical feedersÑincluding HC-3315, HC-3330, and HC-3340Ñthe lock ring supports consistent performance and easy maintenance. Made from high-strength materials, it offers long-lasting durability in demanding pool environments.

• Built for Pentair Systems: Compatible with Dynamic Series IÐIII filters, Predator II models, and select chemical feeders and leaf traps.

• Buttress Thread for Tight Seal: Threaded design enhances system integrity and prevents leaks under filtration pressure.

• Used in Rainbow Feeders: Matches models HC-3315, HC-3330, and HC-3340 for reliable chemical feeder performance.

• Supports Leak-Free Operation: Maintains proper assembly of inline filter housings and chemical units.

• Durable Construction: Made from robust materials for sustained use in outdoor and high-flow system conditions.

• (1)ÊLock Ring

• Pentair Predator II Filter
• Pentair Dynamic Series I, II, III and IV Filters
• Pentair Leaf Traps
• Pentair Chemical Feeders Feeder Models: HC3315, HC-3330 and HC-3340

Need a replacement lock ring for your Pentair Dynamic filter or Rainbow feeder? This section helps walk-in customers verify if the R172214 fits their model, how to install it after buying in-store, and when itÕs time to replace a worn ring.

Finding the Right Lock Ring In Store

Confirm that the R172214 matches your filtration or feeder setup before walking into DPM.

Can I buy the R172214 lock ring in store for my HC-3315 feeder?

Does this lock ring fit Dynamic Series I and II filters sold locally?

Will store staff help me match this to my Rainbow trap?

Can I bring my old cracked ring to DPM to compare it?

Is this ring available for my Predator II filter system in store?

Installing the Lock Ring After Local Purchase

After youÕve picked up the lock ring, use these questions to guide proper installation.

How do I align the R172214 ring for a leak-free seal?

Do I need tools to tighten the ring on my Dynamic filter?

Can I install this without removing the filter from the system?

Is there a correct torque or hand-tightening limit to follow?

Identifying Lock Ring Wear or Damage

Watch for these signs that itÕs time to replace your current ring with one from DPM.

Why is my current ring not sealing tightly anymore?

Can a stripped thread cause pressure loss in the feeder?

What causes cracks around the lock ring collar?

Should I replace the lock ring if the system is leaking from the top?