Pentair IntelliChem® Controller without Pump for Systems using External Feed Pumps
The Pentair IntelliChem® Controller without Pump is the controller-only version of the IntelliChem platform — designed for installations that already have external feed pumps or where custom chemical feed hardware is preferred. It automatically monitors pool pH and sanitizing levels and delivers just the right amount of chemicals, using the same technology found in commercial installations, water parks, hotels, and community pools.
All the intelligence of IntelliChem — built-in Langelier Saturation Index calculator, programmable feed cycles, flow sensor protection, password-protected access, and seamless Pentair automation integration — without the bundled tanks and pumps. NSF certified. Backed by a 2-year warranty.
Key Features
Controller Only — External Pumps Required
Designed for installations with existing external feed pumps or custom chemical feed configurations. No tanks or pumps included.
Automatic pH and Sanitizer Monitoring
Continuously monitors pool chemistry and controls connected external feed pumps automatically.
Langelier Saturation Index Calculator
Built-in LSI calculator provides a complete picture of water balance — not just sanitizer and pH readings alone.
Programmable Feed Cycles
Configure chemical feed cycles and mix times for precise water balance.
Overfeed Protection
Assures safe water conditions by preventing excess chemical addition.
Flow Sensor Safety
Chemicals won't feed without confirmed system flow — prevents equipment damage during pump downtime.
Seamless Pentair Automation Integration
Interfaces with IntelliTouch®, EasyTouch®, SunTouch®, and ScreenLogic2® for superior chemical management.
IntelliChlor® and CO2 Compatible
Compatible with IntelliChlor salt chlorine generators, external dosing pumps, and CO2 systems.
NSF Certified
NSF certified for pool and spa chemical control equipment.
2-Year Warranty
Pentair commercial warranty coverage.
Who It's For
- Commercial pool operators who already have external chemical feed pumps and need only the IntelliChem controller
- Retrofit installations upgrading to IntelliChem from a third-party chemical feed system
- Custom chemical room buildouts where specific pump and tank hardware is specified separately
- Anyone who wants the IntelliChem platform without paying for redundant tanks and pumps
Specifications
System
| Application | Pool (Commercial) |
| Includes | Controller Only (No Pumps or Tanks) |
| Compatible Automation | IntelliTouch®, EasyTouch®, SunTouch®, ScreenLogic2® |
| Compatible Systems | IntelliChlor®, External Dosing Pumps, CO2 Systems |
| Temperature Range | 30°F – 110°F |
| Certifications | NSF Certified |
Physical
| Product Weight | 13.3 lb |
| Shipping Dimensions | 16.75 × 12.75 × 8 in |
Approvals & Warranty
| Energy Efficient | Yes (Eco-Select) |
| Warranty | 2 Years |
What's in the Box
- Pentair IntelliChem Controller (Controller Only)
- User Manual
Warranty
The IntelliChem Controller without Pump (521357) comes with a 2-year manufacturer warranty from Pentair. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
What type of external feed pumps does this work with?
The IntelliChem 521357 is designed to work with external chemical dosing pumps — the controller provides the signal outputs to drive compatible pumps for both acid (pH down) and chlorine/sanitizer dosing. Pentair and third-party peristaltic or diaphragm dosing pumps are commonly used. Confirm pump compatibility with your installer for your specific installation.
When would I choose this over the 522621 (with acid tank and pump)?
Choose the 521357 when you already have chemical feed pumps installed, are upgrading from another controller, or are specifying your own pump and tank hardware as part of a custom chemical room. Choose the 522621 when you need the complete package — controller, acid tank, and pump — out of the box.
Does it work without Pentair automation?
Yes. IntelliChem can operate as a standalone chemical controller independently of any automation system. Integration with IntelliTouch, EasyTouch, SunTouch, and ScreenLogic2 is optional.
Is it compatible with IntelliChlor salt generators?
Yes. The IntelliChem 521357 is fully compatible with IntelliChlor salt chlorine generators for integrated pH and sanitizer management in salt water pools.