{"product_id":"icon-33-gallon-rv-holding-tank-56x36x5-5-h3925","title":"ICON - 33 Gallon RV Holding Tank - 56\" x 36\" x 5.5\" - H3925 - Black\/Gray Water","description":"\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 15px; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0; color: #1d9bf0; font-weight: bold;\"\u003e✓ \u003cstrong\u003eElkhartRVParts.com - The Only Authorized Place for ICON RV Tanks\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #10b981; padding: 15px; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0; color: #10b981; font-weight: bold;\"\u003e✓ \u003cstrong\u003e100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eICON H3925 33-Gallon RV Holding Tank\u003c\/strong\u003e solves the most critical waste management challenge for RV owners: finding a durable, reliable replacement tank that fits perfectly and lasts for years without leaks or failures. Measuring 56\" x 36\" x 5.5\", this low-profile holding tank is engineered with extra-thick material construction that far exceeds standard tank durability, making it ideal for black water, gray water, or dual-purpose applications in Class A motorhomes, fifth wheels, and travel trailers.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e33-Gallon Capacity\u003c\/strong\u003e - Generous holding capacity for extended trips without frequent dumping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtra-Thick Material Construction\u003c\/strong\u003e - Engineered with thicker walls than standard tanks for superior durability and leak resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreinstalled Drain Hub \u0026amp; Level Sensors\u003c\/strong\u003e - Factory-installed fittings and sensors save installation time and ensure proper operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIAPMO \u0026amp; CSA Certified\u003c\/strong\u003e - Meets rigorous industry standards for safety, quality, and performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Profile Design\u003c\/strong\u003e - 5.5\" height fits tight spaces and low-clearance installations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose Use\u003c\/strong\u003e - Suitable for black water, gray water, or combined waste applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Yet Durable\u003c\/strong\u003e - 29 lbs empty weight for easier handling during installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the ICON H3925 Holding Tank?\u003c\/h2\u003e\n\u003cp\u003eWhen your RV's holding tank fails, you need a replacement that fits perfectly, installs easily, and lasts for years without issues. The \u003cstrong\u003eICON H3925 33-gallon holding tank\u003c\/strong\u003e delivers professional-grade quality with extra-thick material construction that resists cracking, warping, and stress failures common in cheaper tanks. The preinstalled drain hub and level sensors eliminate the guesswork and extra work of drilling holes and installing fittings yourself, while IAPMO and CSA certifications guarantee this tank meets the highest industry standards for safety and performance. The low-profile 5.5\" height makes this tank perfect for installations where vertical clearance is limited, such as under slideouts or in basement storage areas. Whether you're replacing a failed tank, upgrading to higher capacity, or building a custom RV, this \u003cstrong\u003eICON holding tank\u003c\/strong\u003e provides the reliability and durability that serious RVers demand.\u003c\/p\u003e\n\n\u003ch2\u003eCompare ICON RV Holding Tanks\u003c\/h2\u003e\n\u003cp\u003eChoosing the right holding tank depends on your RV's available space and capacity needs. Compare our complete range of ICON holding tanks to find the perfect fit:\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 (L x W x H)\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\n\u003cstrong\u003eH3925\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eSKU: 15049\u003c\/small\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e33 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e56\" x 36\" x 5.5\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eLow-profile, wide installations\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;\"\u003e\n\u003cstrong\u003eH3977\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eSKU: 15123\u003c\/small\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e29 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e52\" x 22\" x 8.25\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eMedium capacity, moderate height\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/icon-holding-tank-h3977-52x22x8-25-29-gallons\" style=\"color: #dc2626; font-weight: bold;\"\u003eView H3977 →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eHT293SD\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eSKU: 12583\u003c\/small\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e28 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e63\" x 24\" x 7\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eLeft side drain, long narrow spaces\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/28-gallon-rv-waste-holding-tank-left-side-drain-63-x-24-x-7-ht293sd\" style=\"color: #dc2626; font-weight: bold;\"\u003eView HT293SD →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eHT473-ED\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eSKU: 12422\u003c\/small\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e21 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e70\" x 17.75\" x 7\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eExtra long, narrow installations with end drain\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/icon-holding-tank-ht473-ed-70x17-75x7-21-gallons\" style=\"color: #dc2626; font-weight: bold;\"\u003eView HT473-ED →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eH3979\u003c\/strong\u003e\u003cbr\u003e\u003csmall\u003eSKU: 14393\u003c\/small\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e20 gallons\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e28\" x 21\" x 18\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eCompact spaces, taller profile\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-plumbingrv-fresh-water-tanks20-gallon-rv-water-tank-39-x-16-x-8\" style=\"color: #dc2626; font-weight: bold;\"\u003eView H3979 →\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: 15px; border-left: 4px solid #dc2626; margin: 20px 0;\"\u003e\u003cstrong\u003e💡 Pro Tip:\u003c\/strong\u003e Measure your RV's tank compartment carefully before ordering. The H3925's low 5.5\" height makes it ideal for installations under slideouts or in tight vertical spaces, while the 56\" x 36\" footprint requires adequate floor space. Always verify clearance for drain fittings and sensor wiring.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e H3925\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 15049\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 33 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H):\u003c\/strong\u003e 56\" x 36\" x 5.5\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmpty Weight:\u003c\/strong\u003e 29 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Extra-thick high-density polyethylene (HDPE)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain Hub:\u003c\/strong\u003e Preinstalled (standard 3\" fitting)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLevel Sensors:\u003c\/strong\u003e Preinstalled (4-level monitoring system)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e IAPMO \u0026amp; CSA certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Black water, gray water, or dual-purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible RV Types:\u003c\/strong\u003e Class A motorhomes, fifth wheels, travel trailers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e ICON Direct\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOne (1) ICON H3925 33-Gallon RV Holding Tank\u003c\/li\u003e\n\u003cli\u003ePreinstalled drain hub with 3\" fitting\u003c\/li\u003e\n\u003cli\u003ePreinstalled 4-level sensor system\u003c\/li\u003e\n\u003cli\u003eIAPMO \u0026amp; CSA certification documentation\u003c\/li\u003e\n\u003cli\u003e30-day return policy from Elkhart RV Parts\u003c\/li\u003e\n\u003cli\u003eNote: Drain valves, hoses, and mounting hardware sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\n\u003cp\u003eThis tank is designed for RVs requiring a low-profile 33-gallon holding tank with a 56\" x 36\" footprint. It's commonly used in Class A motorhomes, large fifth wheels, and travel trailers with basement storage areas. For different capacity or dimension requirements, see the comparison table above for alternative ICON holding tanks. Browse our complete selection of \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/vendors?q=Icon+Direct\" style=\"color: #dc2626; font-weight: bold;\"\u003eICON RV tanks and plumbing components\u003c\/a\u003e for additional options.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat's the difference between black water and gray water tanks?\u003c\/h3\u003e\n\u003cp\u003eBlack water tanks hold waste from the toilet, while gray water tanks collect wastewater from sinks and showers. This ICON H3925 tank can be used for either application or as a dual-purpose tank. The extra-thick material construction and preinstalled sensors work equally well for both black and gray water systems.\u003c\/p\u003e\n\n\u003ch3\u003eAre the drain hub and sensors already installed?\u003c\/h3\u003e\n\u003cp\u003eYes, the ICON H3925 comes with a preinstalled drain hub (standard 3\" fitting) and a complete 4-level sensor system. This saves significant installation time and ensures proper placement and sealing of critical components. You'll still need to connect your drain valve, plumbing, and sensor wiring during installation.\u003c\/p\u003e\n\n\u003ch3\u003eWill this tank fit my RV?\u003c\/h3\u003e\n\u003cp\u003eThe H3925 measures 56\" x 36\" x 5.5\" and requires adequate floor space and clearance for installation. Measure your RV's tank compartment carefully, accounting for drain fittings, sensor wiring, and mounting hardware. The low 5.5\" height makes this tank ideal for installations where vertical clearance is limited, such as under slideouts or in basement storage areas.\u003c\/p\u003e\n\n\u003ch3\u003eHow is this tank better than standard holding tanks?\u003c\/h3\u003e\n\u003cp\u003eICON tanks feature extra-thick material construction that provides superior durability and leak resistance compared to standard tanks. The thicker walls resist cracking, warping, and stress failures, while IAPMO and CSA certifications guarantee the tank meets rigorous industry standards. Preinstalled fittings and sensors also ensure proper installation and reliable operation.\u003c\/p\u003e\n\n\u003ch3\u003eCan I install this tank myself?\u003c\/h3\u003e\n\u003cp\u003eWhile experienced RVers with proper tools can install holding tanks, professional installation is recommended for safety and warranty purposes. Installation involves removing the old tank, positioning the new tank, connecting drain plumbing, wiring sensors to your monitor panel, and securing the tank with mounting straps or brackets. Improper installation can lead to leaks, sensor failures, or tank damage.\u003c\/p\u003e\n\n\u003ch3\u003eWhat maintenance does this holding tank require?\u003c\/h3\u003e\n\u003cp\u003eRegular maintenance includes using RV-safe toilet paper and holding tank treatments, flushing the tank thoroughly after dumping, and inspecting drain fittings and sensors periodically for leaks or damage. The extra-thick material construction and quality fittings minimize maintenance needs, but proper care extends tank life and prevents odors and clogs.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\n\u003cp\u003eElkhart RV Parts is your authorized source for genuine ICON RV holding tanks and plumbing components. We stock authentic OEM parts directly from ICON Direct, ensuring you receive factory-quality tanks engineered for your specific application. Every order is backed by our 30-day return policy and ships quickly from our Indiana warehouse. Our team specializes in RV systems and can help you select the right holding tank for your RV's dimensions and capacity requirements.\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #fef2f2; border-left: 4px solid #dc2626; padding: 20px; margin: 30px 0;\"\u003e\n\u003cp style=\"margin: 0; font-size: 16px; font-weight: bold; color: #dc2626;\"\u003eUpgrade to professional-grade waste management with the ICON H3925 33-gallon holding tank. Order today for fast shipping and authentic OEM quality. Questions about fit or installation? Our AI Live Chat is here to help you find the perfect tank for your RV.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Icon Direct","offers":[{"title":"Default Title","offer_id":41824146260120,"sku":"15049","price":622.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/15049-rvholdingtanks-rightsidedrain-H3925_m.png?v=1741791122","url":"https:\/\/elkhartrvparts.com\/products\/icon-33-gallon-rv-holding-tank-56x36x5-5-h3925","provider":"Elkhart RV Parts","version":"1.0","type":"link"}