.product-description { color: inherit; line-height: 1.75; max-width: 860px; } .product-description h2 { font-size: 1.2rem; font-weight: 700; margin: 2rem 0 0.6rem; border-bottom: 2px solid #cce0ff; padding-bottom: 0.3rem; } .product-description h3 { font-size: 1rem; font-weight: 700; margin: 1.5rem 0 0.4rem; } .product-description p { margin: 0 0 1rem; } .product-description ul { margin: 0 0 1rem 1.4rem; padding: 0; } .product-description ul li { margin-bottom: 0.4rem; } .product-description .spec-list { margin: 1rem 0 1.5rem; font-size: 0.95rem; border: 1px solid #c4d9f0; border-radius: 4px; overflow: hidden; } .product-description .spec-row { display: flex; flex-wrap: wrap; border-bottom: 1px solid #c4d9f0; } .product-description .spec-row:last-child { border-bottom: none; } .product-description .spec-key { flex: 0 0 38%; background-color: #e8f1fb; font-weight: 700; padding: 0.5rem 0.75rem; box-sizing: border-box; } .product-description .spec-val { flex: 1 1 62%; padding: 0.5rem 0.75rem; box-sizing: border-box; } .product-description .spec-row:nth-child(even) .spec-val { background-color: #f5f9ff; } .product-description .spec-row:nth-child(even) .spec-key { background-color: #edf4fc; } @media (max-width: 540px) { .product-description .spec-key, .product-description .spec-val { flex: 0 0 100%; } .product-description .spec-key { padding-bottom: 0.2rem; } .product-description .spec-val { padding-top: 0.2rem; } } .product-description .doc-links { background-color: #f0f6ff; border-left: 4px solid #0066cc; padding: 0.75rem 1rem; margin: 1.5rem 0; border-radius: 0 4px 4px 0; } .product-description .doc-links h2 { border-bottom: none; margin: 0 0 0.4rem; font-size: 1rem; padding-bottom: 0; } .product-description .doc-links ul { margin: 0 0 0 1.2rem; } Hayward CAT Controller pH Sensor Probe, 10-foot cable (W3PRO15-10). OEM replacement pH electrode for Hayward CAT and HCC series chemical automation pool controls. 1/2" NPT ABS body, BNC connector. For equipment rooms where the controller and flow cell require more than 24 inches of cable reach. SKU: W3PRO15-10 OEM pH replacement probe for Hayward CAT and HCC series controllers 10-foot cable for installations where the controller and flow cell are farther apart Compatible with CAT1000, CAT3500, CAT4000, CAT5000, CAT5500, HCC1000, HCC2000 Direct replacement; same BNC connector and port threading as factory-installed probe 1/2" NPT injection-molded ABS body; color-coded BNC connector Two-point calibration via CAT controller interface (pH 7.0 and 4.0 buffers) Verify against handheld photometric test after calibration; within 0.1 to 0.2 pH units is acceptable Never store dry; use pH 4.0 buffer or probe storage solution during seasonal shutdown Recommended replacement interval: every 12 to 24 months Hayward CAT Controller pH Probe (W3PRO15-10): OEM Replacement for CAT and HCC Series Pool Controls The W3PRO15-10 is the factory pH sensor for Hayward CAT and HCC series chemical automation with a 10-foot cable for installations where the flow cell and controller are not side by side. Direct replacement; no adapters or controller reconfiguration required. Install in a flow cell or bypass sample cell on the return line, downstream of filtration and chemical injection. Two-point calibrate using fresh NIST-traceable pH 7.0 and 4.0 buffers after installation. 10-Foot vs. 24-Inch Cable: Which Length Do You Need? Measure the routed cable path from the flow cell pH port to the controller's pH input before ordering. The 10-foot version is appropriate when that distance exceeds 22 inches. For compact installations where controller and flow cell are adjacent, use the 24-inch version (W3PRO15-2). Never splice or extend the cable. Hayward CAT Controller pH Probe 10-Foot Specifications SKU W3PRO15-10 Measurement pH (potential of hydrogen) Cable Length 10 feet Connector BNC (color-coded) Body 1/2" NPT injection-molded ABS Compatible Controllers CAT1000, CAT3500, CAT4000, CAT5000, CAT5500, HCC1000, HCC2000 Calibration Two-point (pH 7.0 and 4.0 buffer solutions) via controller interface Installation Flow cell or bypass sample cell on pool return line, after filtration Replacement Interval Every 12 to 24 months Frequently Asked Questions Is the 10-foot cable version the same probe as the 24-inch version? Yes. Same sensing element, electrode technology, and BNC connector. The only difference is cable length. What calibration buffers do I need? Use fresh, unexpired NIST-traceable pH 7.0 and 4.0 buffer solutions. Expired buffers are a common cause of calibration error. Verify the controller's displayed pH against a handheld photometric test after calibration; agreement within 0.1 to 0.2 pH units is acceptable. How should I store the probe during seasonal shutdown? Store in a manufacturer-recommended probe storage solution or pH 4.0 buffer in a sealed cap. Never store dry, and never store in distilled or deionized water. Should I replace the ORP probe at the same time? Replacing both probes in a single service visit is the most efficient approach and ensures the full measurement pair is renewed simultaneously. Hayward CAT Controller pH Probe 10-Foot Manual and Warranty Info Installation & Flow Cell Plumbing Guide (PDF) Two-Point Calibration & Verification Procedure (PDF) CAT Series Probe Compatibility Chart & Model Cross-Reference (PDF) { "@context": "https://schema.org/", "@type": "Product", "name": "Hayward CAT Controller pH Sensor Probe 10 Foot Cable Pool Controls", "brand": { "@type": "Brand", "name": "Hayward" }, "description": "OEM pH replacement probe for Hayward CAT and HCC series chemical automation pool controls. SKU W3PRO15-10. 10-foot cable, BNC connector, 1/2\" NPT ABS body. 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