Hayward CAT 5500 Chemical Control System with WiFi
The Hayward CAT 5500 Chemical Control System with WiFi is the most advanced CAT controller — equipped with state-of-the-art sensing and control capabilities tailored specifically for salt chlorine applications. It goes beyond pH and ORP to add TDS and salt (conductivity/NaCl) monitoring, dual sanitizer setpoints for backup ORP control, and temperature sensing for heater control — all with wireless PoolComm connectivity.
Comes complete with CAT Professional Series pH, ORP, and conductivity sensors, WiFi transceiver, machined flow cell and rotary flow sensor. Built on a CNC machined PVC backboard with UV-protected Lexan membrane interface and injection molded flow cell with integral baffles. NSF and ANSI Standard 50 certified. Backed by a 5-year controller warranty and 2-year sensor warranty.
Key Features
pH, ORP, and Conductivity/NaCl Monitoring
Complete salt chlorine system monitoring — pH, ORP, and salt concentration (conductivity/NaCl) in a single controller.
TDS and Salt Monitoring
Monitor total dissolved solids and salt levels directly — know when to add salt or drain and dilute without guesswork.
Dual Sanitizer Setpoints
Dual ORP setpoints enable backup sanitization control — secondary chemical feeder activates when ORP drops below threshold.
Temperature Sensor for Heater Control
Integrated temperature monitoring with heater control capability.
Auxiliary Relays
Additional auxiliary relays for expanded control versatility — run additional equipment from the controller.
PoolComm WiFi Connectivity
Wireless communication to the PoolComm platform for remote monitoring and management.
All Three CAT Professional Sensors Included
pH, ORP, and Conductivity sensors all included — complete sensing package out of the box.
Machined Flow Cell and RFS Included
Premium machined flow cell and rotary flow sensor included.
Perfect Complement to Saline C® 6.0
Specifically designed to work with the Hayward Saline C® 6.0 salt chlorine generator.
5-Year Controller / 2-Year Sensor Warranty
Best-in-class warranty coverage. NSF and ANSI Standard 50 certified.
Who It's For
- Commercial salt chlorine pool operators who want complete automated control of pH, ORP, and salt levels
- Facilities running Hayward Saline C 6.0 salt generators who want integrated chemical control
- Anyone who needs dual sanitizer setpoints, backup ORP control, and temperature-based heater management
- Operations requiring PoolComm remote monitoring plus the most comprehensive sensor coverage available
Specifications
Control Parameters
| Parameters Monitored | pH, ORP, Conductivity/NaCl, TDS, Temperature |
| pH Alarms | pH Low and High |
| Sanitizer Setpoints | Dual ORP Setpoints (Primary + Backup) |
Connectivity
| Wireless | WiFi (PoolComm) |
Included Hardware
| Sensors | pH, ORP, and Conductivity (CAT Professional Series) |
| Flow Cell | Machined Flow Cell with Integral Baffles |
| Flow Sensor | Rotary Flow Sensor (RFS) |
| Transceiver | WiFi Transceiver |
Construction
| Backboard | CNC Machined & Beveled PVC |
| Interface | UV-Protected Lexan Membrane Switch |
| Display | LED |
Physical
| Product Weight | 20 lb |
| Shipping Dimensions | 23 × 18 × 7.5 in |
Approvals & Warranty
| Certifications | NSF Certified, ANSI Standard 50 Certified |
| Controller Warranty | 5 Years (Limited) |
| Sensor Warranty | 2 Years |
What's in the Box
- Hayward CAT 5500 Controller (CNC PVC Backboard)
- WiFi Transceiver
- Machined Flow Cell with Integral Baffles
- Rotary Flow Sensor (RFS)
- CAT Professional Series pH Sensor
- CAT Professional Series ORP Sensor
- CAT Professional Series Conductivity Sensor
- User Manual
Warranty
The Hayward CAT 5500 comes with a 5-year limited warranty on the controller and a 2-year warranty on sensors. Clearflow Pool Supply is an authorized Hayward dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
How does the CAT 5500 differ from the CAT 4000?
The CAT 5500 adds conductivity/NaCl (salt) monitoring, TDS measurement, dual sanitizer ORP setpoints, temperature sensing with heater control, and auxiliary relays — capabilities not available on the CAT 4000. The CAT 5500 is specifically designed for salt chlorine pool environments where monitoring salt concentration directly is critical. Choose the CAT 4000 for standard pH/ORP control; choose the CAT 5500 when salt monitoring and dual ORP setpoints are required.
What does conductivity/NaCl monitoring tell me?
Conductivity monitoring measures the electrical conductivity of the water, which correlates directly to the salt (NaCl) concentration in a salt pool. The controller can display the actual salt level in PPM/PPT, alert operators when salt is too low or too high, and provide the data needed to maintain optimal salt chlorinator performance without manual salt testing.
What are dual sanitizer setpoints used for?
Dual ORP setpoints allow the CAT 5500 to control both a primary sanitizer (e.g., the salt generator) and a secondary backup chemical feeder. If the primary sanitizer can't bring ORP up to the primary setpoint, the secondary feeder activates — providing an automatic safety net for periods of heavy bather load or equipment maintenance.
Is it compatible with the Saline C 6.0 salt generator?
Yes. The CAT 5500 is described as the "perfect complement" to the Hayward Saline C® 6.0 salt chlorine generator — the two systems are designed to work together for complete automated salt pool water chemistry management.