{"product_id":"vaillant-boiler-expansion-vessel-181051-pressure-relief-valve-96008la-1","title":"Vaillant Boiler Expansion Vessel 181051 + Pressure Relief Valve 96008LA","description":"\u003ch1\u003e\u003cspan\u003eVaillant Boiler Expansion Vessel 181051 + Pressure Relief Valve 96008LA\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVaillant Boiler Expansion Vessel 181051 with Pressure Relief Valve (PRV) 96008LA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a replacement hydraulic safety component kit designed for use within selected Vaillant heating systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe expansion vessel is a key component of a sealed heating system. It absorbs the increase in water volume as the system temperature rises, helping to maintain stable operating pressure. The pressure relief valve (PRV) provides additional protection by releasing excess system pressure when required, helping prevent pressure-related damage to the boiler and heating system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eℹ️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eProduct Condition Options:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis part may be available in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNew or Refurbished\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e condition. Please check the available options from the dropdown menu.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Insight \u0026amp; Common Failure Symptoms\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe expansion vessel contains an internal diaphragm and air chamber that manages pressure changes within a sealed heating system. Over time, the diaphragm can deteriorate or the vessel may lose its charge, reducing its ability to control system pressure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe pressure relief valve is a safety device designed to discharge water if the boiler pressure rises above the safe operating level. A faulty PRV may leak or fail to reseal correctly after operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTypical symptoms linked to a faulty expansion vessel or PRV include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBoiler pressure rising excessively when heating is operating\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePressure relief valve leaking or discharging water\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequent need to repressurise the heating system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBoiler pressure dropping after operation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWater escaping from the PRV discharge pipe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePressure-related boiler faults or lockouts\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReplacing the expansion vessel and PRV together may help restore stable system pressure and reliable boiler operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCompatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eManufacturer Part Numbers (MPN):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e181051\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Expansion Vessel\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e96008LA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Pressure Relief Valve (PRV)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis part is designed for selected models within the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVaillant\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e range.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePlease strictly verify the manufacturer part numbers \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e181051\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e96008LA\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e against your boiler's technical manual, exploded parts diagram, or existing components before ordering to guarantee correct fitment.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSafety Advice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eBoiler pressure components involve water, heating system pressure, and internal boiler assemblies. Installation and servicing must be carried out by a Gas Safe registered engineer in accordance with current regulations and manufacturer instructions.\u003c\/span\u003e\u003c\/p\u003e","brand":"National Boiler Spares","offers":[{"title":"Default Title","offer_id":44365112344679,"sku":"N8914","price":57.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/0923\/8887\/files\/image369012213_60170a9d-e1cc-488d-b117-7952d18815ab.jpg?v=1786016863","url":"https:\/\/nationalboilerspares.co.uk\/products\/vaillant-boiler-expansion-vessel-181051-pressure-relief-valve-96008la-1","provider":"National Boiler Spares","version":"1.0","type":"link"}