{"product_id":"elkhart-plastics-35-gallon-rv-black-water-holding-tank-54x32x8-epi-4894","title":"Elkhart Plastics - 35 Gallon RV Black Water Holding Tank - 54\" x 32\" x 8\" - EPI 4894 H867070","description":"\u003cdiv style=\"background:#f3f4f6;border-left:4px solid #1d9bf0;padding:16px;margin-bottom:12px;\"\u003e\u003cstrong style=\"color:#1d9bf0;\"\u003e✓ ElkhartRVParts.com - The Only Authorized Place for Elkhart Plastics \/ Ameri-Kart\u003c\/strong\u003e\u003c\/div\u003e\u003cdiv style=\"background:#f3f4f6;border-left:4px solid #10b981;padding:16px;margin-bottom:20px;\"\u003e\u003cstrong style=\"color:#10b981;\"\u003e✓ 100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\u003c\/div\u003e\u003ch2\u003e35 Gallon RV Black Water Holding Tank - Elkhart Plastics EPI 4894\u003c\/h2\u003e\u003cp\u003eWhen your RV's black water system fails, you need an exact-fit replacement you can trust. The Elkhart Plastics EPI 4894 35-gallon black water holding tank delivers the same OEM-grade quality used by major RV manufacturers — so you get a perfect fit and lasting performance, not a generic aftermarket gamble.\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 35 gallons (132 liters) — extended camping without frequent dump station visits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 54\" x 32\" x 8\" (L x W x H) — engineered for precise OEM replacement fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-density polyethylene (HDPE) — resists cracking, warping, UV, and chemical damage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e EPI 4894 \/ H867070 — cross-referenced for easy identification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA — manufactured at Elkhart Plastics' Indiana facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 87 lbs — heavy-duty wall thickness for long-term durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Seamless, leak-proof design with standard fittings and mounting points\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Choose the Elkhart Plastics EPI 4894?\u003c\/h2\u003e\u003cp\u003eElkhart Plastics Industries (EPI) is the largest manufacturer of custom polyethylene tanks in North America and the OEM supplier to virtually every major RV brand. When you install the EPI 4894 35-gallon RV black water holding tank, you're installing the same part that came in your rig from the factory — not a substitute.\u003c\/p\u003e\u003cp\u003eThe 54\" x 32\" x 8\" footprint is a common OEM dimension found in Class A motorhomes, fifth wheels, and large travel trailers. The low-profile 8\" height maximizes underbelly clearance while the wide 54\" x 32\" base delivers full 35-gallon capacity without sacrificing ground clearance.\u003c\/p\u003e\u003cp\u003eUnlike aftermarket tanks that may require adapter fittings or custom mounting, the EPI 4894 drops in as a direct replacement — saving you time, labor costs, and the frustration of ill-fitting parts.\u003c\/p\u003e\u003ch2\u003eCompare 35-Gallon RV Holding Tanks\u003c\/h2\u003e\u003cp\u003eNot sure which tank fits your rig? Compare the EPI 4894 against similar-capacity Elkhart Plastics tanks to find the right dimensions for your application.\u003c\/p\u003e\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#dc2626;color:#fff;\"\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003eModel (Part #)\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003eCapacity\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003eDimensions (L x W x H)\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003eBest For\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\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\n\u003cstrong\u003eEPI 4894 \/ H867070\u003c\/strong\u003e ⬅ This Product\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e35 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e54\" x 32\" x 8\"\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eClass A motorhomes \u0026amp; large fifth wheels needing wide, low-profile tank\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCurrent Page\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eEPI 3185 \/ H1233000\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e32 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e40\" x 20\" x 12\"\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eTravel trailers \u0026amp; fifth wheels with narrower, taller underbelly space\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/elkhart-plastics-32-gallon-rv-holding-tank-40x20x12-epi-3185-h1233000\" style=\"color:#dc2626;\"\u003eView EPI 3185\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eEPI 4848 \/ H1017\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e31 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e34\" x 19.5\" x 13\"\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eCompact fifth wheels \u0026amp; travel trailers with taller tank bays\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/elkhart-plastics-31-gallon-rv-holding-tank-34x19-5x13-epi-4848-h1017\" style=\"color:#dc2626;\"\u003eView EPI 4848\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eEPI 2006 \/ H1231002\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e37 Gallons\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e60\" x 24\" x 8\"\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eLonger bays needing extra capacity with same low-profile height\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/37-gallon-rv-holding-tank-60x24x8-side-drain-epi-2006-h1231002\" style=\"color:#dc2626;\"\u003eView EPI 2006\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp style=\"font-size:13px;color:#6b7280;margin-top:8px;\"\u003e💡 \u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always measure your existing tank's length, width, and height before ordering. Even a 1\" difference in height can prevent proper installation. Match your part number first — then verify dimensions as a secondary check.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Type:\u003c\/strong\u003e Black water (waste) holding tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 35 gallons \/ 132 liters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 54\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 32\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-density polyethylene (HDPE)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 87 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e EPI 4894\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e H867070\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHS Code:\u003c\/strong\u003e 392510\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFittings:\u003c\/strong\u003e Standard RV fittings included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Standard mounting points for direct OEM replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1x Elkhart Plastics EPI 4894 35-gallon black water holding tank\u003c\/li\u003e\n\u003cli\u003eStandard fittings and mounting hardware\u003c\/li\u003e\n\u003cli\u003eManufacturer quality assurance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\u003cp\u003eLooking for a different size or configuration? Browse our full selection of Elkhart Plastics OEM holding tanks:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/elkhart-plastics-32-gallon-rv-holding-tank-40x20x12-epi-3185-h1233000\" style=\"color:#dc2626;\"\u003e32 Gallon RV Holding Tank - EPI 3185 (40\" x 20\" x 12\")\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/elkhart-plastics-31-gallon-rv-holding-tank-34x19-5x13-epi-4848-h1017\" style=\"color:#dc2626;\"\u003e31 Gallon RV Holding Tank - EPI 4848 (34\" x 19.5\" x 13\")\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/37-gallon-rv-holding-tank-60x24x8-side-drain-epi-2006-h1231002\" style=\"color:#dc2626;\"\u003e37 Gallon RV Holding Tank - EPI 2006 (60\" x 24\" x 8\")\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs the EPI 4894 a direct replacement for my existing 35-gallon black water tank?\u003c\/strong\u003e\u003cbr\u003eIf your existing tank measures 54\" x 32\" x 8\" or carries part number EPI 4894 or H867070, yes — this is a direct OEM replacement. Always verify dimensions before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat RV types is the 54\" x 32\" x 8\" tank compatible with?\u003c\/strong\u003e\u003cbr\u003eThis tank is commonly found in Class A motorhomes, large fifth wheels, and some Class C motorhomes. The wide, low-profile design is ideal for rigs with shallow underbelly tank bays.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I install the EPI 4894 holding tank?\u003c\/strong\u003e\u003cbr\u003eProfessional installation is recommended. The tank includes standard fittings and mounting points for direct replacement. Drain the existing tank completely, disconnect fittings, remove mounting hardware, and reverse the process with the new tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's the difference between black water and gray water tanks?\u003c\/strong\u003e\u003cbr\u003eBlack water tanks hold toilet waste, while gray water tanks collect sink and shower drain water. This EPI 4894 is specifically designed as a black water tank but the HDPE material is compatible with gray water applications as well.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere to buy authentic Elkhart Plastics EPI 4894 holding tanks?\u003c\/strong\u003e\u003cbr\u003eElkhartRVParts.com is an authorized Elkhart Plastics dealer. Purchasing here ensures you receive a genuine OEM-grade part — not a counterfeit or inferior substitute.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Dealer:\u003c\/strong\u003e Direct relationship with Elkhart Plastics \/ Ameri-Kart for guaranteed authenticity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Quality:\u003c\/strong\u003e Same parts used by major RV manufacturers on the assembly line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Supporting American manufacturing in Elkhart, Indiana — the RV capital of the world\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpert Support:\u003c\/strong\u003e Questions? Use our AI Live Chat for instant product guidance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Shipping:\u003c\/strong\u003e Nationwide shipping on all holding tanks\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv style=\"background:#f3f4f6;border-left:4px solid #dc2626;padding:16px;margin-top:20px;\"\u003e\n\u003cstrong style=\"color:#dc2626;\"\u003eReady to restore your RV's waste system?\u003c\/strong\u003e Add the EPI 4894 to your cart today for fast, reliable shipping. Need help confirming fitment? Use our AI Live Chat — we're here to help you get the right part the first time.\u003c\/div\u003e","brand":"Elkhart Plastics\/Ameri-Kart","offers":[{"title":"Default Title","offer_id":32789675737147,"sku":"4894\/H867070","price":458.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/products\/tank4894__46389.jpg?v=1584468176","url":"https:\/\/elkhartrvparts.com\/products\/elkhart-plastics-35-gallon-rv-black-water-holding-tank-54x32x8-epi-4894","provider":"Elkhart RV Parts","version":"1.0","type":"link"}