{"product_id":"crown-boiler-cr-ggw58-12-gauge-glass-washer-5-8-in-pack-12","title":"Crown Boiler CR-GGW58-12 Gauge Glass Washer 5\/8 in Pack 12","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe CROWN BOILER CR-GGW58-12 is a pack of 12 rubber washers designed to seal and support 5\/8-inch OD gauge-glass tubes in boiler sight-glass assemblies. These washers are molded from heat-resistant elastomer suited for standard hydronic and steam boiler operating conditions. They create a reliable seal around the gauge glass, preventing leaks and maintaining fluid-level visibility. Licensed boiler technicians and plumbers install these washers during routine sight-glass maintenance or full sight-glass replacement. The pack-of-12 quantity supports technician stocking and reduces multiple service trips for a common wear item.\u003c\/p\u003e\n\u003cp\u003eThe CR-GGW58-12 washers are used in hydronic heating systems and steam boiler installations where sight-glass assemblies require periodic resealing. Sight-glass washers are a routine maintenance consumable — they harden or compress over time, leading to minor seepage around the gauge glass. Replacing them during any sight-glass service restores a proper seal and supports accurate water-level readings. These washers are appropriate for residential and light commercial boiler applications where 5\/8-inch gauge glass tubing is installed.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/8-inch ID sizing fits standard 5\/8-inch OD gauge-glass tubes\u003c\/li\u003e\n  \u003cli\u003eHeat-resistant elastomer construction suited for boiler service temperatures\u003c\/li\u003e\n  \u003cli\u003ePack of 12 washers supports technician inventory stocking\u003c\/li\u003e\n  \u003cli\u003ePrevents seepage and leaks at sight-glass fittings\u003c\/li\u003e\n  \u003cli\u003eSuitable for hydronic and steam boiler sight-glass assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement washer for boiler sight-glass assemblies using 5\/8-inch OD gauge-glass tubing in residential and light commercial hydronic or steam boiler systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSight-glass washer replacement is performed by licensed plumbers or qualified boiler technicians. Before servicing a sight glass, shut off the boiler, isolate the sight-glass valves, and allow the system to depressurize and cool fully before disassembling any fittings. Inspect the sight-glass tube for cracks or etching during washer replacement and replace the tube if compromised. Follow applicable local boiler codes and ASME guidelines when servicing pressurized boiler components.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Diameter\u003c\/strong\u003e: 5\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Gauge Glass OD\u003c\/strong\u003e: 5\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Heat-resistant elastomer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack Quantity\u003c\/strong\u003e: 12 washers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: CROWN BOILER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: CR-GGW58-12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CROWN BOILER","offers":[{"title":"Default Title","offer_id":51346506187058,"sku":"CR-GGW58-12","price":14.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310553435.jpg?v=1782082208","url":"https:\/\/voomisupply.com\/products\/crown-boiler-cr-ggw58-12-gauge-glass-washer-5-8-in-pack-12","provider":"Voomi Supply","version":"1.0","type":"link"}