{"product_id":"elkhart-plastics-9-gallon-rv-holding-tank-22-5x16-5x9-epi-450h-h1260","title":"Elkhart Plastics - 9 Gallon RV Holding Tank - 22.5\" x 16.5\" x 9\" - EPI 450H H1260 - Black Water Gray Water","description":"\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 16px; margin-bottom: 16px;\"\u003e\u003cstrong style=\"color: #1d9bf0;\"\u003e✓ ElkhartRVParts.com - The Only Authorized Place for Elkhart Plastics\u003c\/strong\u003e\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #10b981; padding: 16px; margin-bottom: 24px;\"\u003e\u003cstrong style=\"color: #10b981;\"\u003e✓ 100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\u003c\/div\u003e\n\n\u003cp\u003eNeed a compact holding tank for tight spaces? The Elkhart Plastics 9 Gallon RV Holding Tank EPI 450H delivers reliable waste storage in a space-efficient 22.5\" x 16.5\" x 9\" footprint. With heavy-duty 0.180\" black polyethylene construction and a 3\" outlet, this tank provides professional-grade performance for black water or gray water applications in RVs, campers, and marine vessels where space is at a premium.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9 Gallon Capacity\u003c\/strong\u003e - Compact waste storage for small RVs, campers, and marine applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Footprint:\u003c\/strong\u003e 22.5\" L x 16.5\" W x 9\" H - Perfect for tight compartments and limited spaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Black Polyethylene\u003c\/strong\u003e - Durable material resists UV damage and chemical degradation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless One-Piece Construction\u003c\/strong\u003e - Rotomolded design eliminates weak joints and potential leak points\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThick Walls:\u003c\/strong\u003e 0.180\" thickness - Superior durability and puncture resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\" Outlet\u003c\/strong\u003e - Standard drain fitting size for easy connection to RV plumbing systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Application:\u003c\/strong\u003e Suitable for black water (toilet waste) or gray water (sink\/shower drainage)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlank Tank Design\u003c\/strong\u003e - Custom fitting placement allows precise configuration for your specific plumbing needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the Elkhart Plastics 9 Gallon EPI 450H?\u003c\/h2\u003e\n\u003cp\u003eFinding a reliable holding tank for compact RVs and campers can be challenging. The EPI 450H solves this problem with a carefully engineered 22.5\" x 16.5\" x 9\" footprint that maximizes capacity while fitting in tight spaces where larger tanks won't work. The seamless rotomolded construction creates a single-piece tank with uniform 0.180\" wall thickness and no weak seams where cracks typically develop. Black polyethylene construction provides superior UV resistance and chemical durability for long-lasting performance. Whether you're replacing a damaged tank or upgrading your waste management system, the EPI 450H delivers professional-grade reliability backed by Elkhart Plastics' reputation for quality.\u003c\/p\u003e\n\n\u003ch2\u003eCompare 9 Gallon RV Holding Tanks\u003c\/h2\u003e\n\u003cp\u003eNot sure which compact holding tank is right for your RV? Compare the EPI 450H with similar small-capacity options to find the perfect fit for your specific space constraints.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x: auto; margin: 20px 0;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e5e7eb;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #dc2626; color: white;\"\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eCapacity\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eDimensions\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eBest For\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eView Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #fef2f2; border-left: 3px solid #dc2626;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eElkhart EPI 450H\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e9 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e22.5\" x 16.5\" x 9\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eCompact spaces, small RVs and campers\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; 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: 12px; border: 1px solid #e5e7eb;\"\u003eElkhart EPI 3772 (Discontinued)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e8 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e17.75\" x 17.75\" x 8.25\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eSquare footprint, slightly smaller capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-plumbingrv-holding-tanks8-gallon-rv-holding-tank-17-3-4-x-17-3-4-x-8-1-4\" style=\"color: #dc2626; text-decoration: none; font-weight: bold;\"\u003eView Tank →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eElkhart EPI 184H (Discontinued)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e12 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e22.75\" x 15\" x 7.5\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eSimilar length, narrower width, lower profile\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-plumbingrv-holding-tanks12-gallon-rv-holding-tank-22-3-4-x-15-x-7-1-2\" style=\"color: #dc2626; text-decoration: none; font-weight: bold;\"\u003eView Tank →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eElkhart EPI 0199H (Discontinued)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e13 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e22\" x 17\" x 11\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eSimilar footprint, taller profile, more capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-plumbingrv-holding-tanks13-gallon-rv-holding-tank-22-x-17-x-11\" style=\"color: #dc2626; text-decoration: none; font-weight: bold;\"\u003eView Tank →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"background-color: #f3f4f6; padding: 12px; border-left: 3px solid #dc2626; margin-top: 16px;\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e The 9 gallon capacity is ideal for weekend trips and short excursions in compact RVs. For extended trips, consider pairing with a larger tank or plan for more frequent dump station visits.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 9 Gallons (34.1 Liters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 22.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 16.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Black polyethylene (UV and chemical resistant)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Seamless one-piece rotational molding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall Thickness:\u003c\/strong\u003e 0.180 inches (heavy-duty construction)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 3 inches (standard RV drain fitting)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Black water or gray water holding tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e EPI 450H, H1260\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVendor:\u003c\/strong\u003e Elkhart Plastics\/Ameri-Kart\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e9 Gallon RV Holding Tank (EPI 450H)\u003c\/li\u003e\n\u003cli\u003eBlank tank design allows custom fitting placement\u003c\/li\u003e\n\u003cli\u003e3\" outlet pre-molded into tank\u003c\/li\u003e\n\u003cli\u003eManufacturer warranty coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This is a blank tank with a 3\" outlet. Additional fittings for fill connections, vents, and sensors can be positioned exactly where your RV requires them. Fittings sold separately.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\n\u003cp\u003eThe EPI 450H's compact 22.5\" x 16.5\" x 9\" dimensions make it ideal for small RVs, campers, pop-up trailers, and marine vessels where space is extremely limited. If you need a different capacity or footprint, explore our complete selection of \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/holding-tanks\" style=\"color: #dc2626;\"\u003eRV holding tanks\u003c\/a\u003e or browse \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/vendors?q=Elkhart+Plastics\" style=\"color: #dc2626;\"\u003eall Elkhart Plastics products\u003c\/a\u003e. For custom installations, consider our range of \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/tank-fittings\" style=\"color: #dc2626;\"\u003etank fittings and accessories\u003c\/a\u003e to complete your setup.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this tank fit in my compact RV?\u003c\/strong\u003e\u003cbr\u003e\nThe 22.5\" x 16.5\" x 9\" dimensions make this tank ideal for tight spaces in small RVs and campers. Measure your available clearance carefully - you need at least 22.5\" length x 16.5\" width x 9\" height.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this tank be used for both black water and gray water?\u003c\/strong\u003e\u003cbr\u003e\nYes, the EPI 450H is suitable for both black water (toilet waste) and gray water (sink\/shower drainage) applications. The black polyethylene construction and chemical-resistant material handle both waste types without degradation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat fittings do I need to install this tank?\u003c\/strong\u003e\u003cbr\u003e\nThis tank comes with a 3\" outlet pre-molded. You'll need additional fittings for fill connections, vent fittings, and optional sensor fittings. Browse our \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/tank-fittings\" style=\"color: #dc2626;\"\u003etank fittings collection\u003c\/a\u003e for compatible options.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow often will I need to empty a 9 gallon tank?\u003c\/strong\u003e\u003cbr\u003e\nThis depends on your usage, but a 9 gallon tank is best suited for weekend trips or short excursions with 1-2 people. For extended trips, you'll need to empty more frequently or consider a larger capacity tank.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the 0.180\" wall thickness durable enough?\u003c\/strong\u003e\u003cbr\u003e\nYes, the 0.180\" wall thickness is Elkhart Plastics' standard heavy-duty specification, providing excellent durability and puncture resistance. This is thicker than many economy tanks which often use 0.125\" or thinner walls.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this tank be used in a marine application?\u003c\/strong\u003e\u003cbr\u003e\nAbsolutely! The compact design and durable black polyethylene construction make it perfect for boats, yachts, and other marine vessels where you need reliable waste storage in a limited space.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\n\u003cp\u003eAs an authorized Elkhart Plastics dealer, we guarantee 100% authentic OEM-grade parts backed by manufacturer warranties. Our team specializes in RV plumbing components and can help you select the right tank, fittings, and accessories for your specific application. Every Elkhart Plastics tank we sell is built to rigorous quality standards that ensure safe, reliable performance for years to come.\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #dc2626; padding: 16px; margin-top: 24px;\"\u003e\n\u003cp style=\"margin: 0; font-weight: bold; color: #dc2626;\"\u003eNeed Help Finding the Right Compact Tank?\u003c\/p\u003e\n\u003cp style=\"margin: 8px 0 0 0;\"\u003eOur AI Live Chat can help you find the perfect holding tank for your specific space constraints and capacity requirements. Get instant answers about dimensions, compatibility, and installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Elkhart Plastics\/Ameri-Kart","offers":[{"title":"Default Title","offer_id":32789625241659,"sku":"450H\/H1260","price":297.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/products\/0450H-2__09645.png?v=1584468007","url":"https:\/\/elkhartrvparts.com\/en-ca\/products\/elkhart-plastics-9-gallon-rv-holding-tank-22-5x16-5x9-epi-450h-h1260","provider":"Elkhart RV Parts","version":"1.0","type":"link"}