{"product_id":"hayward-cat-controller-orp-sensor-probe-10-foot-cable","title":"Hayward CAT Controller ORP Sensor Probe 10 Foot Cable","description":"\u003c!-- more --\u003e\n\u003cstyle\u003e\n  .product-description {\n    color: inherit;\n    line-height: 1.75;\n    max-width: 860px;\n  }\n  .product-description h2 {\n    font-size: 1.2rem;\n    font-weight: 700;\n    margin: 2rem 0 0.6rem;\n    border-bottom: 2px solid #cce0ff;\n    padding-bottom: 0.3rem;\n  }\n  .product-description h3 {\n    font-size: 1rem;\n    font-weight: 700;\n    margin: 1.5rem 0 0.4rem;\n  }\n  .product-description p { margin: 0 0 1rem; }\n  .product-description ul { margin: 0 0 1rem 1.4rem; padding: 0; }\n  .product-description ul li { margin-bottom: 0.4rem; }\n  .product-description .spec-list {\n    margin: 1rem 0 1.5rem;\n    font-size: 0.95rem;\n    border: 1px solid #c4d9f0;\n    border-radius: 4px;\n    overflow: hidden;\n  }\n  .product-description .spec-row {\n    display: flex;\n    flex-wrap: wrap;\n    border-bottom: 1px solid #c4d9f0;\n  }\n  .product-description .spec-row:last-child { border-bottom: none; }\n  .product-description .spec-key {\n    flex: 0 0 38%;\n    background-color: #e8f1fb;\n    font-weight: 700;\n    padding: 0.5rem 0.75rem;\n    box-sizing: border-box;\n  }\n  .product-description .spec-val {\n    flex: 1 1 62%;\n    padding: 0.5rem 0.75rem;\n    box-sizing: border-box;\n  }\n  .product-description .spec-row:nth-child(even) .spec-val { background-color: #f5f9ff; }\n  .product-description .spec-row:nth-child(even) .spec-key { background-color: #edf4fc; }\n  @media (max-width: 540px) {\n    .product-description .spec-key,\n    .product-description .spec-val { flex: 0 0 100%; }\n    .product-description .spec-key { padding-bottom: 0.2rem; }\n    .product-description .spec-val { padding-top: 0.2rem; }\n  }\n  .product-description .doc-links {\n    background-color: #f0f6ff;\n    border-left: 4px solid #0066cc;\n    padding: 0.75rem 1rem;\n    margin: 1.5rem 0;\n    border-radius: 0 4px 4px 0;\n  }\n  .product-description .doc-links h2 {\n    border-bottom: none;\n    margin: 0 0 0.4rem;\n    font-size: 1rem;\n    padding-bottom: 0;\n  }\n  .product-description .doc-links ul { margin: 0 0 0 1.2rem; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"product-description\" itemscope itemtype=\"https:\/\/schema.org\/Product\"\u003e\n  \u003cmeta itemprop=\"name\" content=\"Hayward CAT Controller ORP Sensor Probe 10 Foot Cable Pool Controls\"\u003e\n  \u003cmeta itemprop=\"brand\" content=\"Hayward\"\u003e\n  \u003cmeta itemprop=\"category\" content=\"Pool Controls\"\u003e\n  \u003cmeta itemprop=\"sku\" content=\"W3PRO25-10\"\u003e\n\n  \u003cp itemprop=\"description\"\u003eHayward CAT Controller ORP Sensor Probe, 10-foot cable (W3PRO25-10). OEM replacement ORP electrode for Hayward CAT and HCC series chemical automation pool controls. 1\/2\" NPT ABS body, BNC connector. 2-year warranty. For installations where the controller and flow cell are farther apart than the 24-inch version can reach.\u003c\/p\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eSKU: W3PRO25-10\u003c\/li\u003e\n    \u003cli\u003e2-year warranty\u003c\/li\u003e\n    \u003cli\u003e10-foot cable for equipment rooms where the controller and flow cell are not adjacent\u003c\/li\u003e\n    \u003cli\u003eCompatible with CAT1000, CAT3500, CAT4000, CAT5000, CAT5500, HCC1000, HCC2000\u003c\/li\u003e\n    \u003cli\u003eDirect replacement; same BNC connector and port threading as factory-installed probe\u003c\/li\u003e\n    \u003cli\u003e1\/2\" NPT injection-molded ABS body\u003c\/li\u003e\n    \u003cli\u003eVerify against a calibrated portable ORP meter after installation; agreement within 10 to 20 mV is acceptable\u003c\/li\u003e\n    \u003cli\u003eORP setpoint target: 650 mV or above per CDC Model Aquatic Health Code\u003c\/li\u003e\n    \u003cli\u003eRecommended replacement interval: every 12 to 24 months\u003c\/li\u003e\n    \u003cli\u003eNeed a gold tip for demanding environments? See W3PRO25-AU-10\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eHayward CAT Controller ORP Probe (W3PRO25-10): ORP Monitoring for Commercial Pool Chemical Automation\u003c\/h2\u003e\n  \u003cp\u003eORP (oxidation-reduction potential) is the millivolt signal the CAT controller uses to trigger chlorine dosing. Without an accurate ORP reading, the controller has no reliable basis for sanitizer management. The W3PRO25-10 restores that measurement link with a direct-fit 10-foot cable suited to installations where the flow cell and controller are not side by side. Install in a flow cell or bypass sample cell on the pool return line, downstream of filtration and chemical injection, for representative continuous readings. No adapters or controller reconfiguration required.\u003c\/p\u003e\n\n  \u003ch2\u003eORP vs. pH: Why Both Probes Matter\u003c\/h2\u003e\n  \u003cp\u003eORP measures oxidizing capacity; pH determines what fraction of that chlorine is active hypochlorous acid. At pH 7.8, the same chlorine concentration produces meaningfully lower ORP than at pH 7.4. The CAT controller monitors both simultaneously for coordinated acid and chlorine dosing. Replace both probes at the same service interval for the cleanest result.\u003c\/p\u003e\n\n  \u003ch2\u003eHayward CAT ORP Probe 10-Foot Specifications\u003c\/h2\u003e\n  \u003cdiv class=\"spec-list\"\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSKU\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eW3PRO25-10\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eMeasurement\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eORP (oxidation-reduction potential), millivolts\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eCable Length\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e10 feet\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eConnector\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eBNC\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBody\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e1\/2\" NPT injection-molded ABS\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eCompatible Controllers\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eCAT1000, CAT3500, CAT4000, CAT5000, CAT5500, HCC1000, HCC2000\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eVerification\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eCompare controller display against portable ORP meter; within 10 to 20 mV is acceptable\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eFlow cell or bypass sample cell on pool return line, after filtration\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eORP Target (commercial)\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e650 mV or above per CDC Model Aquatic Health Code\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eReplacement Interval\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eEvery 12 to 24 months\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eWarranty\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e2-year\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n  \u003ch3\u003eHow is ORP probe verification different from pH calibration?\u003c\/h3\u003e\n  \u003cp\u003epH probes use two-point buffer calibration (pH 7.0 and 4.0). ORP probes are verified by comparing the controller's millivolt reading against a portable ORP meter from the same water sample. If the two agree within 10 to 20 mV, the probe is functioning correctly. A large or unstable discrepancy indicates a fouled or depleted probe.\u003c\/p\u003e\n\n  \u003ch3\u003eMy CAT controller shows stable ORP but my DPD test shows low chlorine. What does that mean?\u003c\/h3\u003e\n  \u003cp\u003eA stable but fixed millivolt reading that doesn't track with known chlorine changes is the classic sign of a fouled or depleted probe that has stopped responding to actual water chemistry. Verify against a portable ORP meter and replace if it fails to agree within tolerance.\u003c\/p\u003e\n\n  \u003ch3\u003eWhen should I use the gold tip version instead?\u003c\/h3\u003e\n  \u003cp\u003eThe gold tip (W3PRO25-AU-10) is better suited to indoor pools, therapy pools, and high-bather-load facilities where elevated combined chlorine is a recurring issue. For standard outdoor commercial pools with well-balanced chemistry, the standard platinum version is appropriate.\u003c\/p\u003e\n\n  \u003cdiv class=\"doc-links\" role=\"complementary\" aria-label=\"Hayward CAT Controller ORP Sensor Probe 10-Foot Cable Manual and Warranty Info\"\u003e\n    \u003ch2\u003eHayward CAT Controller ORP Probe 10-Foot Manual and Warranty Info\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e\u003ca href=\"\/docs\/hayward-cat-controller-orp-probe-10ft-installation-guide.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation \u0026amp; Flow Cell Plumbing Guide (PDF)\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/docs\/hayward-cat-controller-orp-probe-10ft-verification-procedure.pdf\" target=\"_blank\" rel=\"noopener\"\u003eMillivolt Verification \u0026amp; Offset Adjustment Procedure (PDF)\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/docs\/hayward-cat-series-orp-ph-probe-replacement-schedule.pdf\" target=\"_blank\" rel=\"noopener\"\u003eORP \u0026amp; pH Probe Replacement Schedule and Maintenance Log Template (PDF)\u003c\/a\u003e\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Hayward CAT Controller ORP Sensor Probe 10 Foot Cable Pool Controls\",\n    \"brand\": { \"@type\": \"Brand\", \"name\": \"Hayward\" },\n    \"description\": \"OEM ORP replacement probe for Hayward CAT and HCC series chemical automation pool controls. SKU W3PRO25-10. 10-foot cable, BNC connector, 1\/2\\\" NPT ABS body. Compatible with CAT1000, 3500, 4000, 5000, 5500, HCC1000, HCC2000. 2-year warranty. Recommended replacement every 12 to 24 months.\",\n    \"sku\": \"W3PRO25-10\",\n    \"category\": \"Pool Controls\",\n    \"offers\": {\n      \"@type\": \"Offer\",\n      \"availability\": \"https:\/\/schema.org\/InStock\",\n      \"priceCurrency\": \"USD\",\n      \"seller\": { \"@type\": \"Organization\", \"name\": \"Your Store Name\" }\n    }\n  }\n  \u003c\/script\u003e\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48566396944601,"sku":"W3PRO25-10","price":429.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/3592\/7513\/files\/hayward-logo.jpg?v=1731006221","url":"https:\/\/nonstopswim.com\/products\/hayward-cat-controller-orp-sensor-probe-10-foot-cable","provider":"Nonstop Swim","version":"1.0","type":"link"}