{"product_id":"wilkins-34-p4000a-thermal-expansion-relief-valve-34-inches","title":"Wilkins 34-P4000A | Thermal Expansion Relief Valve, 3\/4 Inches","description":"\u003cp\u003e\u003cstrong\u003eNOTICE:\u003c\/strong\u003e\u003cem\u003e Product images may vary from the actual item due to differences in size or configuration options.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe Wilkins 34-P4000A is a direct-acting thermal expansion relief valve designed for fire protection systems, providing adjustable pressure relief from 50-200 psi.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Specifications:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/4 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Relief Pressure Range:\u003c\/strong\u003e 50-200 psi (UL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Inlet Pressure:\u003c\/strong\u003e 300 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotable Certifications:\u003c\/strong\u003e UL Listed, FM Approved\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Connections:\u003c\/strong\u003e NPT threaded connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eOther Related Variants:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-P4000A:\u003c\/strong\u003e 1\/2 Inch model size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eMaterials:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCast Bronze ASTM B 806 (Main Valve Body \u0026amp; Cover)\u003c\/li\u003e\n\u003cli\u003eNo Lead Brass (Plunger)\u003c\/li\u003e\n\u003cli\u003eNylon Reinforced Buna-N (Diaphragm)\u003c\/li\u003e\n\u003cli\u003eEPDM FDA Approved Rubber (Plunger Rubber)\u003c\/li\u003e\n\u003cli\u003eStainless Steel (Stem \u0026amp; Seat)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTypical Installation:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"background: #f8f9fb; padding: 12px 14px; margin: 0; line-height: 1.7; color: #333;\"\u003eThe Zurn Wilkins 34-P4000A can be installed in any position and is ideal for use in fire protection systems where thermal expansion, pumps or elevated plumbing could cause pressure surges within the fire protection distribution network. The Thermal Expansion Relief Valve prevents pressure build-up by venting excess pressure to atmosphere. Underwriters Laboratories requires the installation of a relief valve of not less than 1\/2 inch in size on the downstream side of the pressure reducing valve with adequate drainage for the relief valve discharge.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eStandards Compliance:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"background: #f8f9fb; border-left: 4px solid #1d85af; padding: 12px 14px; margin: 0; line-height: 1.7; color: #333;\"\u003eUL Listed; FM Approved; NFPA 13; NFPA 25; NPT ANSI B1.20.1\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eFeatures \u0026amp; Benefits:\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverpressure Protection:\u003c\/strong\u003e Protects fire sprinkler and distribution systems from destructive pressure caused by thermal expansion, pumps, or elevated plumbing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Relief Settings:\u003c\/strong\u003e Features adjustable relief pressure range of 50-200 psi with optional high pressure range 150-300 psi for flexible system requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect-Acting Design:\u003c\/strong\u003e Spring-loaded diaphragm design with internal sensing port provides reliable drip-tight shutoff and accurate pressure relief operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire Protection Certified:\u003c\/strong\u003e UL Listed and FM Approved specifically for fire protection applications ensuring compliance with industry safety standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary application for the Wilkins 34-P4000A thermal expansion relief valve?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The Zurn 34-P4000A is designed for fire protection systems to relieve excess pressure caused by thermal expansion, pumps, or elevated plumbing, protecting fire distribution networks from high pressure build-up.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the relief pressure be adjusted on this valve?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, the relief set pressure can be easily adjusted by altering the compression force on the spring. The standard pilot spring range is 50-200 psi, with an optional high pressure range of 150-300 psi available.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What installation position is required for the Zurn 34-P4000A?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The valve can be installed in any position, providing flexible installation options for fire protection systems. Adequate drainage for the relief valve discharge must be provided.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv id=\"W3TucRPBpqQA9ARvwg6ni-content\"\u003e\n\u003cp\u003e\u003cspan\u003e \u003cstrong\u003eNOTICE:\u003c\/strong\u003e Do not use with water that is unsafe or of unknown quality without adequate disinfection either before or after the system. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ci\u003e \"Hydrate Everyone, Everywhere!\" BottleFillingStations.com | \u003ca rel=\"noopener\" href=\"https:\/\/bottlefillingstations.com\/pages\/contact-us\" target=\"_blank\"\u003e Contact us \u003c\/a\u003e \u003c\/i\u003e\u003c\/p\u003e","brand":"Zurn Wilkins","offers":[{"title":"Default Title","offer_id":42983790706751,"sku":"34-P4000A","price":924.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/0985\/files\/P4000A_AF_11fe2d35-8a37-45e4-a10a-c48ac1762f51.jpg?v=1772854723","url":"https:\/\/bottlefillingstations.com\/products\/wilkins-34-p4000a-thermal-expansion-relief-valve-34-inches","provider":"BottleFillingStations.com","version":"1.0","type":"link"}