--- product_id: 25695135 title: "T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water" brand: "classacustoms" price: "R28453" currency: ZAR in_stock: true category: "Class Acustoms" url: https://www.desertcart.co.za/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank store_origin: ZA region: South Africa --- # 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:** R28453 **Availability:** βœ… In Stock ## Summary > πŸ’§ Stay hydrated on the go with trusted, NSF-certified water storage! ## Quick Answers - **What is this?** T-4000 | One (1) RV Fresh Water 40 Gallon Tank, Grey Water by classacustoms - **How much does it cost?** R28453 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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 height or width. - β€’ **Reliable 40-Gallon Capacity:** Generous water storage for extended RV adventures or mobile setups. - β€’ **Durable Seamless Construction:** One-piece design eliminates leaks and bursting risks during transit. - β€’ **NSF Certified Fresh & Gray Water Safe:** Crafted from FDA-approved materials ensuring safe drinking water storage. - β€’ **Made in the USA with Quality Assurance:** Manufactured by Class A Customs in Indiana, cleaned and inspected for pristine use. ## Overview The T-4000 is a 40-gallon fresh or gray water holding tank made from NSF-certified medium density polyethylene resin, ensuring safe drinking water storage. Its seamless, one-piece construction prevents leaks, and its versatile rectangular design (39.5" x 18" x 13") allows flexible installation in RVs, campers, and mobile food vendors. Manufactured in the USA by Class A Customs, this tank is vented for safe use and built to withstand transit without damage. ## 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. ## 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 | #121,156 in Automotive ( See Top 100 in Automotive ) #48 in RV Freshwater Tanks & Inlets | | Brand | classAcustoms | | Brand Name | classAcustoms | | Capacity | 40 gallons | | Color | White | | Customer Reviews | 4.5 out of 5 stars 169 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 | | Number of Items | 1 | | Number of Packs | 1 | | Product Dimensions | 39.5"L x 18"W x 13"H | | Shape | Rectangular | | UPC | 808890308967 | | Unit Count | 1 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 ## 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.co.za/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank](https://www.desertcart.co.za/products/25695135-t-4000-one-1-rv-fresh-water-40-gallon-tank) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-19*