{"product_id":"avg-pressure-temperature-relief-valve-20mm-850kpa-lead-free-dr-brass-watermark-as1357-1-ptr20-850-lf","title":"AVG Pressure Temperature Relief Valve 20mm - 850kPa, Lead Free, DR Brass, WaterMark AS1357.1 | PTR20-850-LF","description":"\u003cp\u003eThe AVG PTR20-850-LF is a 20mm 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\u003e20mm (3\/4\") connection\u003c\/li\u003e\n\u003cli\u003eRelief setting: 850kPa\u003c\/li\u003e\n\u003cli\u003eExpansion capacity: 46kW (PTR20 series)\u003c\/li\u003e\n\u003cli\u003eForged DR brass body, lead free, stainless steel lever action\u003c\/li\u003e\n\u003cli\u003eHigh-temperature silicone boot and seal\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":47927399973013,"sku":"PTR20-850-LF","price":141.59,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2373\/5701\/files\/avg_850_kpa_20mm_pressure_temperature_relief_valve_ptr20-850_1.jpg?v=1788320300","url":"https:\/\/www.plumbersupplies.com.au\/products\/avg-pressure-temperature-relief-valve-20mm-850kpa-lead-free-dr-brass-watermark-as1357-1-ptr20-850-lf","provider":"Plumber Supplies Australia","version":"1.0","type":"link"}