{"product_id":"180305-suburban-bruner-orifice-metric-threads-55","title":"180305 Suburban Bruner Orifice (METRIC THREADS) #55","description":"\u003ch1\u003e180305 Suburban Bruner Orifice (METRIC THREADS) #55\u003c\/h1\u003e\n\u003ch3\u003eFits SF‑20 \/ SF‑20F (Above Serial 021206467) and SF\/SFVH‑20Q\/FQ Furnaces\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eSuburban 180305 Burner Orifice\u003c\/strong\u003e meters the correct LP gas flow into the burner tube on 20k BTU Suburban furnaces. Sized at \u003cstrong\u003e#55\u003c\/strong\u003e, this orifice is calibrated for the SF‑20 family’s BTU output and ensures proper ignition, stable flame shape, and clean combustion. The \u003cstrong\u003emetric thread design\u003c\/strong\u003e is used on later‑production furnaces and all Q\/FQ variants.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUsing the correct thread type is critical—installing a standard‑thread orifice in a metric burner assembly can cause gas leaks, cross‑threading, or improper seating.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOEM Suburban \u003cstrong\u003e#55 LP burner orifice\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eMetric threads\u003c\/strong\u003e for late‑production SF‑20 platforms\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProvides correct gas flow for 20k BTU furnace families\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEnsures proper flame shape, ignition reliability, and combustion stability\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBrass construction for clean, consistent metering\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDirect‑fit replacement for metric‑thread burner assemblies\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eWhen Technicians Replace This Orifice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eYellow, lazy, or unstable flame\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSoot buildup in burner or exhaust\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFurnace failing to ignite or lighting inconsistently\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncorrect BTU output or weak heating\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOrifice clogged with debris or contamination\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBurner assembly updated to metric‑thread spec\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSF‑Series Furnaces:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSF‑20\u003c\/strong\u003e \u003cem\u003e(units above serial no. 021206467)\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSF‑20F\u003c\/strong\u003e \u003cem\u003e(units above serial no. 021206467)\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSF‑20Q\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSF‑20FQ\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSFVH‑Series Furnaces:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSFVH‑20Q\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSFVH‑20FQ\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThis is the correct OEM \u003cstrong\u003emetric‑thread #55\u003c\/strong\u003e orifice for all models listed above.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Laurelhurst","offers":[{"title":"Default Title","offer_id":43069366960194,"sku":"S180305","price":2.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/files\/SuburbanBrunerOrifice_c68fdc13-09ba-4218-8b9c-7441bc28771d.webp?v=1773006169","url":"https:\/\/hvacpartstore.com\/products\/180305-suburban-bruner-orifice-metric-threads-55","provider":"HVACpartstore","version":"1.0","type":"link"}