Product Details
- Brand: Hayward
- Item model number: HL-CHEM
- Product type: Sense and Dispense chemistry automation system
- Function: pH and ORP sensing for compatible pool automation setups
- Protocol listed: Dual protocol / HL
- Product dimensions: Listed as 15 x 11 x 7 inches
- Item weight: Listed as 5.9 pounds
- UPC: Listed as 610377235457
- Category: Kit
- Package contents: Confirm exact included parts before publishing, including whether probes, tubing, flow cell, fittings, cables, calibration solution, manuals, or chemical feed components are included
Compatibility Notes
Use this system only with compatible Hayward automation and salt chlorination equipment that supports HL-CHEM Sense and Dispense. If you need a full control and salt chlorination setup, compare the Hayward AquaPlus chemical automation system before deciding whether HL-CHEM is the correct add-on.
For buyers comparing Hayward control systems, the Hayward Goldline AquaPlus control system may help confirm whether the pool needs a complete automation system or only chemistry sensing support.
If your pool already uses a compatible AquaRite salt system, review the Hayward W3AQR15 AquaRite salt chlorination system to confirm how your salt chlorine generator setup fits into the overall equipment layout.
What This Sense and Dispense System Does
The HL-CHEM system helps monitor pH and ORP levels so a compatible automation system can better manage pool water chemistry. This can reduce manual checking and adjustment, but it does not remove the need for regular water testing, calibration, manual chemical verification, and chemical safety checks.
ORP readings can help indicate sanitizer activity, while pH readings help show whether the water is too acidic or too basic. Accurate readings depend on proper probe condition, calibration, water flow, chemical levels, and correct installation.
pH and ORP Probe Notes
The system relies on working pH and ORP probes to provide useful readings. If the pH reading is unstable or inaccurate, compare the Hayward pH probe for Sense and Dispense before replacing the full system.
If the sanitizer or ORP reading is the issue, review the Hayward ORP probe replacement before assuming the complete HL-CHEM kit needs replacement.
Probes should be handled carefully, stored correctly, and kept clean according to the manufacturer’s instructions. Old, dry, scaled, contaminated, or damaged probes may give poor readings even if the control system is working properly.
Installation Guidance
Install the HL-CHEM system only after confirming compatibility with the control panel, salt chlorination equipment, probe ports, flow cell, plumbing layout, and chemical feed setup. Follow the Hayward manual for probe placement, tubing connection, flow direction, wiring, calibration, chemical feed pump setup, and startup.
Do not install, calibrate, or service chemical automation equipment while power is on. Handle acid, chlorine, and chemical feed lines only according to the manual, and keep probes stored as recommended when not in use. If you are not experienced with pool automation, electrical wiring, calibration, or chemical feed systems, use a qualified pool technician.
Calibration and Maintenance Tips
Calibrate the pH and ORP probes according to the product manual and check readings against reliable manual water tests. Calibration may be needed during startup, after probe replacement, after long storage, or when readings do not match test results.
Keep probes clean, inspect tubing and fittings for leaks, and make sure water is flowing correctly through the sensing chamber. Poor flow, air bubbles in the sensing chamber, dirty probes, incorrect chemical levels, old or dry probes, or expired calibration solution can cause inaccurate readings.
Troubleshooting Before Service
If pH or ORP readings are unstable, check water flow, probe cleanliness, probe age, calibration status, air bubbles in the sensing chamber, and chemical levels before replacing the full kit.
Wrong ORP readings can come from low sanitizer, unbalanced pH, dirty or dry probes, expired calibration solution, poor flow, or an incorrect automation setup, so troubleshooting should be done before ordering replacement parts.
Before You Order
Confirm that your pool automation system supports HL-CHEM and that this kit is the correct Sense and Dispense model for your setup. Also verify whether you need the full HL-CHEM kit, only a pH or ORP probe replacement, or a complete automation system. Check included probes, tubing, flow cell, cables, fittings, calibration solution, manuals, chemical feed pump requirements, warranty details, and whether any additional equipment is required.
