--- product_id: 25695135 title: "| T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water" brand: "classacustoms" price: "573168CFA" currency: XOF in_stock: true reviews_count: 9 category: "Class Acustoms" url: https://www.desertcart.sn/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank store_origin: SN region: Senegal --- # 40 Gallon Capacity 39.5" x 18" x 13" Dimensions NSF Certified MDPE Resin | T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water **Brand:** classacustoms **Price:** 573168CFA **Availability:** βœ… In Stock ## Summary > πŸ’§ Stay hydrated on the go with the ultimate RV water tank upgrade! ## Quick Answers - **What is this?** | T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water by classacustoms - **How much does it cost?** 573168CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank) ## 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 - β€’ **Versatile Installation:** Rotate tank to fit your spaceβ€”can sit on any side for custom setups. - β€’ **NSF Certified Materials:** Crafted from FDA-approved Medium Density Polyethylene for safe drinking water. - β€’ **Massive 40-Gallon Capacity:** Store ample fresh or gray water for extended trips without compromise. - β€’ **Built-in Watertight Fittings:** Two 1.5" and two 0.5" female NPT fittings for seamless plumbing integration. - β€’ **Made in the USA with Quality Assurance:** Class A Customs ensures every tank is cleaned and inspected before shipment. ## Overview The T-4000 is a 40-gallon fresh or gray water holding tank made in the USA by Class A Customs. Constructed from NSF-certified Medium Density Polyethylene, it guarantees safe drinking water storage. Its seamless, rectangular design (39.5" x 18" x 13") allows flexible installation by rotating the tank to fit your space. Equipped with multiple watertight NPT fittings, it supports easy plumbing connections. Ideal for RVs, campers, and mobile vendors, this tank combines durability, safety, and convenience for your water storage needs. ## Description FRESH/DRINKING WATER SAFE – MADE IN THE USA by Class A Customs using NSF Certified Materials Tank & fittings made from DOW NSF International NSF/ANSI Std 61 approved Medium Density Polyethylene (MDPE) Resin SEAMLESS One-piece construction, no seams to burst COLOR Creamy White you can see waterline through tank. 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. TANK MUST BE VENTED allowing air in and out when in use. *DO NOT PRESSURIZE TANK* do not make a sealed connection from garden hose directly to tank damage will occur. DO NOT over-tighten fittings damage will occur. MOUNTING & BRACING Place tank on level surface and brace to prevent tank from moving during transit. DO NOT hang tank by straps. DO NOT place weight on tank. FOOD VENDORS - BEFORE PURCHASING - Verify all requirements with health department where inspection will be made. Review: Can't find a better deal - Amazing fresh water tanks for my school bus conversion. No leaks, no bulging. All the npt holes on a single side of the tank is perfect compared to some other over engineered RV tanks. Excellent price for these. I got two 40gal for a total of 80gal of fresh water. Review: Good - πŸ‘ ## Features - 40 Gallon Fresh or Gray Water Holding Tank Manufactured by Class A Customs - Made from NSF Approved Materials - Fresh & Drinking Water Safe - Can be used for Fresh or Gray Water Storage - WATER TANK MEASUREMENTS: 39 1/2” Longest Length (not including fittings) x 13” x 18” - Tank can sit on any side - rotate tank to change height or width Average Thickness 7/32” +/- Please view photos. (Due to the manufacturing process +/- .25" on each measurement) - TANK BUILT-IN FITTINGS: (TWO) 1.5" Female NPT Fitting - fitting is sealed and watertight, to use remove membrane with razor knife (TWO) .5" Female NPT Fitting - fitting is open DO NOT over-tighten fitting damage will occur, use plastic connecting fittings as metal will damage threads. - NON-PRESSURIZED TANK: tank must be vented allowing air in and out during use. DO NOT make a sealed connection with a garden hose directly to tank, this is a pressurized connection and will cause tank to explode causing damage. For filling tank it is recommended to use a fill dish or other gravity process. - Great extra water storage in RV, pop-up camper, off-road vehicles, concession trailers, hot dog carts, smaller food vendors and portable hand washing sinks. Class A Customs Manufactures this item in the USA in Elkhart, Indiana. Tanks are made in a warehouse clean each tank prior to use to remove any debris, scuffs or marking from the manufacturing process. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01B898H9C | | Best Sellers Rank | #94,817 in Automotive ( See Top 100 in Automotive ) #42 in RV Freshwater Tanks & Inlets | | Brand | classAcustoms | | Brand Name | classAcustoms | | Capacity | 40 gallons | | Color | White | | Customer Reviews | 4.5 out of 5 stars 165 Reviews | | Item Dimensions L x W x H | 39.5"L x 18"W x 13"H | | Item Weight | 49 Pounds | | Manufacturer | Class A Customs | | Manufacturer Part Number | 40-gal | | Manufacturer Warranty Description | Manufacturer warranty covers manufacturer defect on manufacturer installed fittings and tank. Using this tank for any purpose other than fresh or gray water storage will void any/all warranty. Do not use tanks for sewage or fuel. | | Material | Polyethylene (PE), Resin | | Material Type | Polyethylene (PE), Resin | | Model Number | T-4000 | | Product Dimensions | 39.5"L x 18"W x 13"H | | Shape | Rectangular | | UPC | 808890308967 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** classAcustoms - **Capacity:** 40 Gallons - **Color:** White - **Material:** Polyethylene (PE), Resin - **Product Dimensions:** 39.5"L x 18"W x 13"H ## Images ![| T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water - Image 1](https://m.media-amazon.com/images/I/51IooSZAFNL.jpg) ## Questions & Answers **Q: How thick is the plastic that the tank is made of?** A: Average thickness 7/32” +/- **Q: Can i stand this up so that the 39.5 inches is the height? If so, is the tank strong enough to withstand over the road travel or will i need to suppor** A: The tank is strong enough, but all the plumbing holes would be on top of the tank. Why not buy a tank that's designed to be upright like the High Country 1/4 round or 1/2 round vertical tank. Something like this one. https://www.amazon.com/High-Country-Plastics-SL-39-gallon/dp/B0042L749S/ref=pd_sbs_86_3/143-1446200-0535447?_encoding=UTF8&pd_rd_i=B0042L749S&pd_rd_r=714f569d-d145-4695-bdcf-ab4025c53550&pd_rd_w=uEw4N&pd_rd_wg=kF6i5&pf_rd_p=52b7592c-2dc9-4ac6-84d4-4bda6360045e&pf_rd_r=W2Z3ACWY9QYJ9KQY4RC7&psc=1&refRID=W2Z3ACWY9QYJ9KQY4RC7 **Q: Does it have fittings on both ends?** A: No, fittings are on one side, please look at the photos and description. Thanks **Q: Is it 50lbs empty?** A: No it's not hevey at all ## Customer Reviews ### ⭐⭐⭐⭐⭐ Can't find a better deal *by K***K on November 9, 2025* Amazing fresh water tanks for my school bus conversion. No leaks, no bulging. All the npt holes on a single side of the tank is perfect compared to some other over engineered RV tanks. Excellent price for these. I got two 40gal for a total of 80gal of fresh water. ### ⭐⭐⭐⭐⭐ Good *by J***N on March 7, 2026* πŸ‘ ### ⭐⭐⭐⭐ Have water *by N***H on November 21, 2025* Does the job ## Frequently Bought Together - Class A Customs | T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water - Class A Customs | One (1) RV Fresh and Gray Water 30 Gallon Tank | T-3000 - SEAFLO 33-Series Water Pressure Pump - 115V AC, 3.3 GPM, 45 PSI, Self Priming, Smart Pressure Switch, UL & CSA Certified, for RV, Caravan, Off-Grid, Marine, and Industrial Use --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank](https://www.desertcart.sn/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-07-10*