---
product_id: 102040938
title: "Class A Customs | UM-2000 | One (1) UnderMount 20 Gallon RV Fresh and Gray Water Holding Tank RV Concession"
brand: "class a customs"
price: "¥79934"
currency: JPY
in_stock: true
reviews_count: 8
category: "Class A Customs"
url: https://www.desertcart.jp/products/102040938-class-a-customs-um-2000-one-1-undermount-20-gallon
store_origin: JP
region: Japan
---

# 20 Gallon Capacity 48" x 13" x 8.5" Compact Design NSF Certified MDPE Material Class A Customs | UM-2000 | One (1) UnderMount 20 Gallon RV Fresh and Gray Water Holding Tank RV Concession

**Brand:** class a customs
**Price:** ¥79934
**Availability:** ✅ In Stock

## Summary

> 💧 Stay hydrated on the move with the tank that fits your lifestyle!

## Quick Answers

- **What is this?** Class A Customs | UM-2000 | One (1) UnderMount 20 Gallon RV Fresh and Gray Water Holding Tank RV Concession by class a customs
- **How much does it cost?** ¥79934 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/102040938-class-a-customs-um-2000-one-1-undermount-20-gallon)

## Best For

- class a customs enthusiasts

## Why This Product

- Trusted class a customs brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Use Ready:** Ideal for RVs, concession trailers, off-road vehicles, and portable sinks—your go-to water storage solution.
- • **Pure & Safe Hydration:** NSF/ANSI Std 61 certified materials ensure fresh, drinkable water storage without compromise.
- • **Built to Last & Leak-Proof:** Seamless one-piece construction with water-tight fittings prevents leaks and bursting under normal use.
- • **Made in the USA with Precision:** Crafted in Elkhart, Indiana, each tank is warehouse-cleaned and quality-checked for premium reliability.
- • **Versatile Mounting Flexibility:** Rotate the tank to fit your space perfectly—designed to sit on any side for ultimate adaptability.

## Overview

The Class A Customs UM-2000 is a 20-gallon, NSF-certified polyethylene water holding tank designed for fresh or gray water storage. Measuring 48" x 13" x 8.5", it features seamless construction and multiple fittings for secure, leak-proof use. Made in the USA, this versatile tank is perfect for RVs, concession trailers, and portable water needs, offering durable, safe, and flexible water storage.

## 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: Worked great as an onboard water tank for my truck - Worked Great, was the exact size I needed and had all the ports as well. Feels like good quality and it will last a while!
Review: Worked great. - Fresh water tank. Fit well.

## Features

- 20 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: 48” Longest Length (not including fittings) x 8.5” height x 13” width - 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 water-tight, 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 threaded fittings, metal threads may damage tank fittings
- 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 | B07LBB4RTF |
| Best Sellers Rank | #290,621 in Automotive ( See Top 100 in Automotive ) #86 in RV Freshwater Tanks & Inlets |
| Brand | Class A Customs |
| Capacity | 20 Gallons |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (207) |
| Date First Available | December 11, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 30 pounds |
| Item model number | UM-2000 |
| Manufacturer | classAcustoms.com |
| Manufacturer Part Number | UM-2000 |
| Material | Polyethylene (PE) |
| Product Dimensions | 48"L x 13"W x 8.5"H |
| Shape | Rectangular |
| Specification Met | National Sanitation Foundation 61 |

## Product Details

- **Brand:** Class A Customs
- **Capacity:** 20 Gallons
- **Color:** White
- **Material:** Polyethylene (PE)
- **Product Dimensions:** 48"L x 13"W x 8.5"H

## Images

![Class A Customs | UM-2000 | One (1) UnderMount 20 Gallon RV Fresh and Gray Water Holding Tank RV Concession - Image 1](https://m.media-amazon.com/images/I/61lrsIHZzzL.jpg)

## Questions & Answers

**Q: Does this come with a fill dish and hoses?**
A: It did not.  There are Pre-threaded spots you can puncture out on both ends top and bottom to use as you see fit, but no fittings with it. You can buy them at Lowe’s or Home Depot.

**Q: Is this used as a back up fresh water tank?**
A: Yes. Using one for fresh water and one for gray water.

**Q: Is it a perfect 13” wide?**
A: I am pretty sure that the dimensions indicated by the supplier are accurate.

**Q: Is there way to setup Water sensor level?**
A: No I just fill it to just below the top circles or it’ll leak

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked great as an onboard water tank for my truck
*by L***E on July 28, 2025*

Worked Great, was the exact size I needed and had all the ports as well. Feels like good quality and it will last a while!

### ⭐⭐⭐⭐⭐ Worked great.
*by K***L on June 28, 2023*

Fresh water tank. Fit well.

### ⭐⭐⭐⭐ Good fit on van
*by A***R on September 22, 2020*

I installed this on my 2019 144" base Sprinter van next to the fuel tank with three band straps supporting. It is a nice tight fit in this location and is the largest tank that would fit. I'm a bit concerned about the underside support. In retrospect, I might have added a support board along the bottom. It is pretty heavy when full. Hopefully, there won't be any problem.

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**Shop now:** [https://www.desertcart.jp/products/102040938-class-a-customs-um-2000-one-1-undermount-20-gallon](https://www.desertcart.jp/products/102040938-class-a-customs-um-2000-one-1-undermount-20-gallon)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-02*