{"product_id":"hayward-hpx2181-water-pressure-and-flow-switch","title":"Hayward HPX2181 Water Pressure and Flow Switch","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003eThe Hayward HPX2181 Water Pressure and Flow Switch monitors circulation in compatible Hayward heater systems. It verifies adequate water flow before allowing the heater to fire.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eLow flow conditions can damage the heat exchanger if the heater operates without sufficient circulation. A malfunctioning switch may cause nuisance shutdowns or prevent startup. Replacing a failed switch restores safe operation and consistent heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number HPX2181\u003c\/li\u003e\n\u003cli\u003eWater pressure and flow switch\u003c\/li\u003e\n\u003cli\u003eFor compatible Hayward heater models\u003c\/li\u003e\n\u003cli\u003eMonitors circulation before ignition\u003c\/li\u003e\n\u003cli\u003eElectrical safety component\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003eInstallation requires access to the heater water manifold and wiring. Confirm by manufacturer part number before ordering. Inspect filter condition and pump performance during service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Hayward Brand\u003c\/strong\u003e\u003cbr\u003eHayward heater systems incorporate multiple layers of operational safety. Their pressure and flow switches are built to match factory calibration. Service professionals rely on Hayward components for accurate monitoring. Using original parts supports long-term heater performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eThis switch is often replaced after repeated low flow error codes. It is commonly addressed following filter neglect, pump issues, or heater ignition failure.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52050127651090,"sku":"HPX2181","price":65.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/HPPHPX2181_0.jpg?v=1771891814","url":"https:\/\/www.aquaterrabackyard.com\/products\/hayward-hpx2181-water-pressure-and-flow-switch","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}