--- product_id: 175060711 title: "48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800" brand: "classacustoms" price: "6039.37 DT" currency: TND in_stock: true reviews_count: 5 category: "Class Acustoms" url: https://www.desertcart.tn/products/175060711-48-gallon-rv-waste-black-water-holding-tank-56-x store_origin: TN region: Tunisia --- # 3” ABS Fixed Outlet 48 Gallon Capacity Made in USA MDPE Resin 48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 **Brand:** classacustoms **Price:** 6039.37 DT **Availability:** ✅ In Stock ## Summary > 🚐 Upgrade your RV’s waste game with rugged, reliable 48-gallon power! ## Quick Answers - **What is this?** 48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 by classacustoms - **How much does it cost?** 6039.37 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/175060711-48-gallon-rv-waste-black-water-holding-tank-56-x) ## Best For - classacustoms enthusiasts ## Why This Product - Trusted classacustoms brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Maximize Your RV Freedom:** 48 gallons means fewer stops—go 10+ days without draining! - • **Customizable Vent & Inlet:** You decide where to install vent and inlet for perfect fit and airflow. - • **Seamless One-Piece Design:** No weak points or seams to burst—reliable under pressure (but don’t pressurize!). - • **Built Tough, Made in the USA:** Durable medium density polyethylene ensures long-lasting, leak-resistant performance. - • **Pro-Grade Installation Ready:** Designed for certified tech installation with heavy-duty mounting and venting requirements. ## Overview This 48-gallon black water holding tank by Class A Customs is crafted in the USA from durable medium density polyethylene resin. Designed exclusively for waste and gray water use in RVs, campers, and tiny homes, it features a seamless one-piece construction and a fixed 3” ABS female outlet. The tank requires user-installed vent and inlet fittings and must be properly mounted and vented to ensure safe, leak-free operation. Ideal for extended trips, it significantly reduces the frequency of waste dumping. ## Description RV Waste Water Holding Tank MADE IN THE USA by Class A Customs using Medium Density Polyethylene (MDPE) Resin TANK NOT FOR FRESH OR DRINKING WATER USE – WASTE/GRAY WATER USE ONLY -SEAMLESS One-piece construction, no seams to burst COLOR Black OEM PART No retail box - no install instructions Have a certified technician install all parts to prevent product damage and personal injury PREPARATION Tanks are made in a warehouse clean each tank prior to use to remove any debris, scuffs or marking from the manufacturing process INSTALLED OUTLET 3” ABS Female Pipe - outlet can not be moved DO NOT over-tighten fittings damage will occur Dump valves do not hook directly to the 3" ABS fitting, from the outlet run PVC or ABS piping, dump valve is added to the piping. INLET & VENT INSTALLATION Class A Customs Black Water Tanks only come with the outlet the end user will determine where the inlet and vent will need to be placed and install, hardware NOT included. TANK MUST BE VENTED allowing air in and out when in use. *DO NOT PRESSURIZE TANK* DO NOT over-tighten fittings damage will occur. MOUNTING & BRACING be sure to secure tank to prevent movement and be sure to secure due to weight when loaded DO NOT place weight on tank. Review: Now able to go 10+ days without draining. - Great Upgrade from 30 gallon tank. Some customizing to install. Used banding iron straps for extra support, ends and middle. Also installed two sprayer, fill end and drain end pointing at sensors. Very pleased with Quality. Great Price. Review: Muy bieno - Muy bueno para mi rv buena calidad ## Features - 48 Gallon RV Waste Water Holding Tank MADE IN THE USA by Class A Customs using Medium Density Polyethylene (MDPE) Resin TANK NOT FOR FRESH OR DRINKING WATER USE – WASTE/GRAY WATER USE ONLY – Used in RV’s Campers, Trailers, Motorhomes and Tiny Houses - INSTALLED OUTLET 3” ABS Female Pipe - outlet can not be moved DO NOT over-tighten fittings damage will occur Dump valves do not hook directly to the 3" ABS fitting, from the outlet run PVC or ABS piping (not included), dump valve (not included) is added to the piping. - INLET & VENT INSTALLATION Class A Customs Black Water Tanks only come with the outlet the end user will determine where the inlet and vent will need to be placed and install, hardware NOT included. TANK MUST BE VENTED allowing air in and out when in use. *DO NOT PRESSURIZE TANK* DO NOT over-tighten fittings damage will occur. - NOT INCLUDED Inlet and Vent Fittings / Additional Fittings / Hardware / Mounting Hardware / Dump Valve / Piping NOT INCLUDED ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07RLTG22R | | Best Sellers Rank | #385,666 in Automotive ( See Top 100 in Automotive ) #37 in RV Black Water Tanks | | Brand | classAcustoms | | Brand Name | classAcustoms | | Capacity | 48 gallons | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 48 Reviews | | Item Dimensions L x W x H | 56"L x 9"H | | Manufacturer | Class A Customs | | Manufacturer Part Number | WT-4800 | | Material | Polyethylene (PE), Polyvinyl Chloride (PVC), Resin | | Material Type | Polyethylene (PE), Polyvinyl Chloride (PVC), Resin | | Number of Items | 1 | | Number of Packs | 1 | | Product Dimensions | 56"L x 9"H | | Shape | Rectangular | | Unit Count | 1 Count | ## Product Details - **Brand:** classAcustoms - **Capacity:** 48 Gallons - **Color:** Black - **Material:** Polyethylene (PE), Polyvinyl Chloride (PVC), Resin - **Product Dimensions:** 56"L x 9"H ## Images ![48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 - Image 1](https://m.media-amazon.com/images/I/71pTHSi0DAL.jpg) ![48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 - Image 2](https://m.media-amazon.com/images/I/71gMzwj1xhL.jpg) ![48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 - Image 3](https://m.media-amazon.com/images/I/51czAVHjUXL.jpg) ![48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 - Image 4](https://m.media-amazon.com/images/I/71jiO4GPYBL.jpg) ![48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 - Image 5](https://m.media-amazon.com/images/I/711a3fh6A9L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Now able to go 10+ days without draining. *by E***A on November 17, 2025* Great Upgrade from 30 gallon tank. Some customizing to install. Used banding iron straps for extra support, ends and middle. Also installed two sprayer, fill end and drain end pointing at sensors. Very pleased with Quality. Great Price. ### ⭐⭐⭐⭐⭐ Muy bieno *by H***A on September 29, 2020* Muy bueno para mi rv buena calidad ### ⭐ Buyer beware *by S***N on June 12, 2025* Tank wouldn’t work and the company wants you to pay to ship it back to them. Terrible customer service. ## Frequently Bought Together - Class A Customs 48 Gallon RV Waste Black Water Holding Tank 56 x 30 x 9 WT-4800 - Valterra T50 3" Hub x 3" Bay with Cap Valve Assembly,Black - ICON 12483 Rubber Grommet, 1-1/2" --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/175060711-48-gallon-rv-waste-black-water-holding-tank-56-x](https://www.desertcart.tn/products/175060711-48-gallon-rv-waste-black-water-holding-tank-56-x) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-29*