{"product_id":"avg-pressure-temperature-relief-valve-25mm-850kpa-lead-free-bronze-body-watermark-as1357-1-ptr25-850-lf","title":"AVG Pressure Temperature Relief Valve 25mm - 850kPa, Lead Free, Bronze Body, WaterMark AS1357.1 | PTR25-850-LF","description":"\u003cp\u003eThe AVG PTR25-850-LF is a 25mm lead free pressure and temperature relief (PTR\/TPR) valve, set to relieve at 850kPa — a critical safety device that vents a hot water system if pressure or temperature climbs beyond a safe limit, preventing tank rupture or scalding discharge.\u003c\/p\u003e\u003cp\u003ePTR valves are safety devices and should be replaced every 4 years, in line with manufacturer and AS\/NZS 3500 guidance. An expansion control valve (ECV) fitted to the cold inlet reduces wear on the PTR valve by absorbing routine thermal expansion instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e25mm (1\") connection\u003c\/li\u003e\n\u003cli\u003eRelief setting: 850kPa\u003c\/li\u003e\n\u003cli\u003eExpansion\/discharge capacity: 132kW (PTR25 series)\u003c\/li\u003e\n\u003cli\u003eBronze valve body, lead free, stainless steel and brass components\u003c\/li\u003e\n\u003cli\u003eImmersed temperature probe activates between 93-99°C\u003c\/li\u003e\n\u003cli\u003eNormal operation drips 3-6% of hot water tank volume during heating cycles; valve automatically reseats after each discharge\u003c\/li\u003e\n\u003cli\u003eWaterMark certified — AS1357.1 Lic 2639; complies with AS4020\u003c\/li\u003e\n\u003cli\u003eManufactured under ISO 9001 \/ ISO 9002 quality assurance\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AVG","offers":[{"title":"Default Title","offer_id":47927400595605,"sku":"PTR25-850-LF","price":281.85,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2373\/5701\/files\/AVG_Temperature_and_Pressure_Releif_Valve_25mm_700kPa_132kW_Product1000px__33454.1741515533.500.750_334a63d7-92cf-4cbb-b471-0d88a62e3c5b.jpg?v=1788320319","url":"https:\/\/www.plumbersupplies.com.au\/products\/avg-pressure-temperature-relief-valve-25mm-850kpa-lead-free-bronze-body-watermark-as1357-1-ptr25-850-lf","provider":"Plumber Supplies Australia","version":"1.0","type":"link"}