Description
Pool pH controller that automatically dispenses muriatic acid to help maintain stable pH levels. Designed for residential pools and compatible with IntelliChlor salt chlorine generators to support balanced, effective sanitization. Mounts to the equipment pad and connects via a 1/2 inch saddle clamp for straightforward integration with existing circulation systems.
Quick Answer: What Is the Pentair 521377?
The Pentair 521377 is a automatic chemical feeder: Pentair IntellipH 4 gal pH Controller. It is brand new, ships in 1-2 business days, and is backed by the Pentair manufacturer warranty.
Pentair 521377 Specifications
| Brand | Pentair |
|---|---|
| Equipment Type | Automatic Chemical Feeder |
| Model Number | 521377 |
| Product Line | IntellipH |
| UPC | 788379847982 |
Key Features
- Automatic acid dosing to stabilize pool pH
- Adjustable dispense rate with push-button control
- Saddle clamp 1/2 inch connection for plumbing integration
- Saddle-clamp mount bolts to equipment pad for secure installation
- Pump-style lid that seals for safe, leak-resistant operation
How It Works
Chemical feeders and controllers deliver sanitizer and pH adjusters consistently. Tab chlorinators and floaters dissolve tablets at a controlled rate, automatic feeders and peristaltic pumps meter liquid chemicals, and controllers measure ORP and pH to tell feeders when to run. Storage and containment products keep chemicals separated, contained and safe.
How to Choose the Right Automatic Chemical Feeder
- Size feeders to the pool volume and chemical demand.
- Confirm the chemical the feeder is rated for (trichlor tablets, liquid chlorine, acid).
- For controllers, check probe types, outputs and alarms needed for your health code.
- Choose containment sized for the containers you store.
If you are replacing an existing part, the fastest way to confirm compatibility is to match the brand and model number on the old equipment. Send us the model number or a photo of the label and our team will help confirm the 521377 is the right fit before you order.
Installation and Safety
Install inline chlorinators after the heater with a check valve to protect equipment. Never mix chemicals, and never put cal-hypo in a trichlor feeder; the reaction can be violent. Follow the chemical manufacturer's safety data sheet and local codes.
Maintenance Tips
- Inspect feeder lids, O-rings and tubing regularly.
- Calibrate pH and ORP probes on schedule.
- Store chemicals cool, dry, ventilated and separated by type.
- Replace worn peristaltic tubes promptly.
What's Included
This listing is for the Pentair 521377 as described in the specifications above. Plumbing, wiring, unions and accessories are not included unless they are listed in the product name or specifications.
Built for Homeowners, Pool Pros and Property Managers
- Homeowners: match your existing model number, then reach out if you want a second set of eyes on compatibility before you order.
- Pool service pros and builders: order quickly, track every shipment, and reorder common parts for your routes and builds.
- Property managers and commercial pools: standardize equipment across properties and plan replacements with help from our team.
White Paper
Frequently Asked Questions About the Pentair 521377
Can I use any tablets in my chlorinator?
Use only the chemical the feeder is rated for, usually trichlor tablets. Never mix chemical types.
Where should a chlorinator be installed?
After the filter and heater, with a check valve so concentrated chlorine cannot back up into equipment.
Do controllers replace testing?
No. Test water regularly to verify controller readings.
Is this the genuine Pentair part?
Yes. It is brand new Pentair equipment (model 521377) covered by the manufacturer warranty. Warranty terms vary by product and application; see the manufacturer documentation or ask our team.
