{"product_id":"cpi-3-hub-with-o-ring-part-300-or","title":"CPI - 3\" Hub with O-Ring - Part #300-OR","description":"\u003cp\u003eThe RV tank adapter 300-OR is a source-matched CPI replacement part for RV tank and plumbing work. Use it when you need part #300-OR and want a cleaner way to confirm the exact fitting style before ordering.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExact CPI part number 300-OR\u003c\/li\u003e\n\u003cli\u003eProduct style: 3\" HUB WITH O-RING\u003c\/li\u003e\n\u003cli\u003eDesigned for RV tank and plumbing fabrication or repair work\u003c\/li\u003e\n\u003cli\u003eLightweight component that is easy to stock as a replacement part\u003c\/li\u003e\n\u003cli\u003eImages verified from the source part detail page on spinwelding.com\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose CPI - 3\" HUB WITH O-RING - Part #300-OR?\u003c\/h2\u003e\u003cp\u003eThe RV tank adapter 300-OR helps you replace a worn, damaged, or missing fitting with the exact CPI part number from the source catalog. This listing keeps the part identification straightforward so you can match the component style before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ch2\u003eCompare RV Tank Adapters\u003c\/h2\u003e\n\u003cp\u003eNot sure which CPI option is right for your repair or fabrication job? Compare a few related products below.\u003c\/p\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#dc2626; color:white;\"\u003e\n\u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eType\u003c\/th\u003e\n\u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eBest For\u003c\/th\u003e\n\u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eView Details\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-left:3px solid #dc2626; background:#fef2f2;\"\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCPI - 3\" HUB WITH O-RING - Part #300-OR - Part #300-OR\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e3\" HUB WITH O-RING\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eExact source-matched option\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCurrent Product\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eCPI - 3\" Hub Adaptor with O Ring - 3.75\" Hole Size - Part # 300\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eRelated CPI option\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eAlternative fitment or size\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/cpi-3-inch-hub-adaptor-o-ring-3-75-hole-size-part-300\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eCPI - 1-1\/2\" Reducer Fitting for 3\" Hub Outlet - 3-3\/4\" Hole Size - Gray Water - Part #320\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eRelated CPI option\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eAlternative fitment or size\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/cpi-1-1-2-reducer-fitting-3-hub-outlet-gray-water-part-320\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eO Ring ONLY for 3\" Hub Adaptor  3 3\/4\" Hole Size Part # 300-O'RING\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eRelated CPI option\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eAlternative fitment or size\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/o-ring-only-for-3-hub-adaptor-3-3-4-hole-size-part-300-oring\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Match the CPI part number first, then confirm the fitting style or tool type before you buy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: CPI\u003c\/li\u003e\n\u003cli\u003ePart number: 300-OR\u003c\/li\u003e\n\u003cli\u003eDescription: 3\" HUB WITH O-RING\u003c\/li\u003e\n\u003cli\u003eWeight: 0.25 lb\u003c\/li\u003e\n\u003cli\u003eInventory tracking: Not tracked\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cp\u003eIncludes one CPI part #300-OR as shown. No extra hardware is included unless it is visibly shown and specifically described by the source.\u003c\/p\u003e\n\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\u003cp\u003eUse this part when your tank or plumbing setup calls for CPI part #300-OR. Always match the thread style, size callout, and fitting style to your original component before ordering.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat is CPI part #300-OR?\u003c\/h3\u003e\u003cp\u003eIt is a CPI 3\" hub with o-ring used in RV tank and plumbing applications.\u003c\/p\u003e\u003ch3\u003eHow do I confirm this RV tank adapter 300-OR fits my setup?\u003c\/h3\u003e\u003cp\u003eMatch the part number and fitting style to your original component and compare the source images before ordering.\u003c\/p\u003e\u003ch3\u003eDoes this listing include installation hardware?\u003c\/h3\u003e\u003cp\u003eOnly the part shown in the product images is included unless otherwise stated in the description.\u003c\/p\u003e\u003ch3\u003eCan this be used on custom tank work?\u003c\/h3\u003e\u003cp\u003eIt is commonly used where the exact CPI fitting style and size are required for a tank or plumbing application.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\u003cp\u003eWe focus on exact RV parts identification so you can buy with more confidence and spend less time chasing the wrong component.\u003c\/p\u003e\n\u003cdiv style=\"background:#f3f4f6; border-left:4px solid #dc2626; padding:16px; margin-top:12px;\"\u003e\n\u003cstrong\u003eNeed help choosing the right CPI part?\u003c\/strong\u003e Use AI Live Chat and reference part #300-OR for a faster match check.\u003c\/div\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":49003752063128,"sku":"300-OR","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/cpi-3-hub-with-o-ring-part-300-or-shopify-1.jpg?v=1779179899","url":"https:\/\/elkhartrvparts.com\/products\/cpi-3-hub-with-o-ring-part-300-or","provider":"Elkhart RV Parts","version":"1.0","type":"link"}