{"product_id":"vail-0020009866-temp-pres-relief-valve","title":"VAILLANT 0020009866 TEMPERATURE\u0026PRESSURE RELIEF VALVE","description":"\u003cp data-end=\"644\" data-start=\"241\"\u003eThe \u003cstrong data-end=\"268\" data-start=\"245\"\u003eVaillant 0020009866\u003c\/strong\u003e is a genuine OEM \u003cstrong data-end=\"327\" data-start=\"286\"\u003etemperature and pressure relief valve\u003c\/strong\u003e designed to provide essential safety protection for compatible Vaillant unvented cylinders, thermal stores, and hot water systems. This dual-function valve automatically releases water if temperature or pressure exceeds safe operating limits, preventing system over-pressurisation, overheating, and potential damage.\u003c\/p\u003e\n\u003cp data-end=\"906\" data-start=\"646\"\u003eA failing T\u0026amp;P valve can lead to dangerous system pressure build-up, leaking discharge pipework, inconsistent hot water performance, or safety lockouts. Replacing it with a genuine Vaillant part ensures full compliance, safety, and long-term system reliability.\u003c\/p\u003e\n\u003cp data-end=\"927\" data-start=\"908\"\u003e\u003cstrong data-end=\"925\" data-start=\"908\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1440\" data-start=\"928\"\u003e\n\u003cli data-end=\"988\" data-start=\"928\"\u003e\n\u003cp data-end=\"988\" data-start=\"930\"\u003e\u003cstrong data-end=\"986\" data-start=\"930\"\u003eGenuine Vaillant temperature \u0026amp; pressure relief valve\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1053\" data-start=\"989\"\u003e\n\u003cp data-end=\"1053\" data-start=\"991\"\u003eProtects the system from overheating and over-pressurisation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1108\" data-start=\"1054\"\u003e\n\u003cp data-end=\"1108\" data-start=\"1056\"\u003eAutomatically vents excess temperature or pressure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1170\" data-start=\"1109\"\u003e\n\u003cp data-end=\"1170\" data-start=\"1111\"\u003eEssential safety component for unvented hot water systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1241\" data-start=\"1171\"\u003e\n\u003cp data-end=\"1241\" data-start=\"1173\"\u003eManufactured to Vaillant’s strict OEM safety and quality standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1316\" data-start=\"1242\"\u003e\n\u003cp data-end=\"1316\" data-start=\"1244\"\u003eHelps resolve leaking PRV issues, temperature faults \u0026amp; safety lockouts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1384\" data-start=\"1317\"\u003e\n\u003cp data-end=\"1384\" data-start=\"1319\"\u003eDurable, long-life brass and high-integrity internal components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1440\" data-start=\"1385\"\u003e\n\u003cp data-end=\"1440\" data-start=\"1387\"\u003eDirect-fit replacement for quick, safe installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1445\" data-start=\"1442\"\u003e\n\u003ch3 data-end=\"1468\" data-start=\"1447\"\u003e\u003cstrong data-end=\"1468\" data-start=\"1451\"\u003eCompatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"1526\" data-start=\"1469\"\u003eThe \u003cstrong data-end=\"1506\" data-start=\"1473\"\u003eVaillant 0020009866 T\u0026amp;P Valve\u003c\/strong\u003e is compatible with:\u003c\/p\u003e\n\u003cul data-end=\"1738\" data-start=\"1528\"\u003e\n\u003cli data-end=\"1572\" data-start=\"1528\"\u003e\n\u003cp data-end=\"1572\" data-start=\"1530\"\u003eSelected \u003cstrong data-end=\"1570\" data-start=\"1539\"\u003eVaillant unvented cylinders\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1613\" data-start=\"1573\"\u003e\n\u003cp data-end=\"1613\" data-start=\"1575\"\u003e\u003cstrong data-end=\"1591\" data-start=\"1575\"\u003eVaillant VUI\u003c\/strong\u003e storage combi units\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1652\" data-start=\"1614\"\u003e\n\u003cp data-end=\"1652\" data-start=\"1616\"\u003e\u003cstrong data-end=\"1650\" data-start=\"1616\"\u003eVaillant thermal store systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1738\" data-start=\"1653\"\u003e\n\u003cp data-end=\"1738\" data-start=\"1655\"\u003eAny appliance listing \u003cstrong data-end=\"1691\" data-start=\"1677\"\u003e0020009866\u003c\/strong\u003e in the official Vaillant parts documentation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1846\" data-start=\"1740\"\u003e\u003cem data-end=\"1846\" data-start=\"1740\"\u003eEngineers should always verify exact compatibility using the cylinder or system’s model-specific manual.\u003c\/em\u003e\u003c\/p\u003e","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":56695685251417,"sku":null,"price":120.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/1379442.jpg?v=1764252958","url":"https:\/\/plumbpartsxpressshop.com\/products\/vail-0020009866-temp-pres-relief-valve","provider":"Plumbparts xpress","version":"1.0","type":"link"}