---
product_id: 590732341
title: "classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000"
brand: "classacustoms"
price: "$349.41"
currency: USD
in_stock: false
url: https://www.desertcart.ec/products/590732341-classacustoms-class-a-customs-under-mount-30-gallon-rv-concession
store_origin: EC
region: Ecuador
---

# BPA Free & NSF Approved 30 Gallon Capacity Made in USA classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000

**Brand:** classacustoms
**Price:** $349.41
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Elevate Your Adventure with Class A Customs!

## Quick Answers

- **What is this?** classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000 by classacustoms
- **How much does it cost?** $349.41 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/590732341-classacustoms-class-a-customs-under-mount-30-gallon-rv-concession)

## 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

- • **🧼 Versatile Use:** Ideal for fresh or gray water storage in various applications.
- • **💪 Durable Design:** Average thickness of 7/32” for reliable performance.
- • **🔧 Easy Installation:** Built-in fittings for hassle-free setup.
- • **🌍 Eco-Friendly Materials:** Crafted from BPA-free, NSF-approved materials.
- • **🚐 Perfect for RVs & Trailers:** Designed to fit seamlessly between cross members.

## Overview

The Class A Customs Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank (UM-3000) is a versatile and durable solution for your water storage needs. Manufactured in the USA, this tank is made from BPA-free and NSF-approved materials, ensuring safety for both fresh and gray water. With dimensions designed to fit between trailer cross members, it features built-in fittings for easy installation and is perfect for RVs, pop-up campers, and food vendors.

## Description

FRESH/DRINKING WATER SAFE NSF Certified Materials Tank & fittings made from DOW NSF International NSF/ANSI Std 61 approved Medium Density Polyethylene (MDPE) Resin BPA FREE Class A Customs does not carry this chemical nor uses it in the manufacturing process FRESH or GRAY TANK use SEAMLESS One piece construction, no seams to burst RESISTANT Stain, Corrosion and Rust Resistant 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 light scratching, scuffs, or dust may be present on tanks and does not effect performance of tank. Sanitize each tank prior to use to remove any debris from the manufacturing process, wipe with a damp cloth to remove surface dust or scuffs. TANK MUST BE VENTED allowing air in and out when in use. *DO NOT PRESSURIZE TANK* do not hook 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. WARRANTY Using tank for any purpose other than fresh/gray water storage voids any/all warranty FOOD VENDORS - BEFORE PURCHASING - Verify all requirements with health department where inspection will be made.

## Features

- 30 Gallon Fresh or Gray Water Holding Tank Manufactured by Class A Customs - BPA FREE - NSF Approved Materials - Fresh & Drinking Water Safe - Can be used for Gray Water Storage
- WATER TANK MEASUREMENTS: 48” Longest Length (not including fittings) x 8.5” height x 20.5” width Average thickness 7/32” +/- (+/- .25" on each measurement) Designed to fit between the cross members of trailers
- TANK BUILT-IN FITTINGS: (TWO) 1.5" Balloon Style Threaded Female NPT Standard - fitting will be closed, to use remove inner membrane with razor knife (TWO) .5" Threaded Female NPT Standard - open fitting, unsealed
- NON-PRESSURIZED TANK: tank must be vented allowing air in and out during use. DO NOT hook garden hose directly to tank doing so will cause tank to explode resulting in damage.
- 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 here in the US in Elkhart, Indiana.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Class A Customs |
| Brand | classAcustoms |
| Product Dimensions | 121.92 x 53.34 x 22.86 cm; 8.16 kg |
| Item model number | UM-3000 |
| Manufacturer Part Number | UM-3000 |
| Item Weight | 8.16 Kilograms |

## Product Details

- **Brand:** classAcustoms
- **Colour:** white
- **Material:** Polyethylene, Resin
- **Capacity:** 30 Gallons
- **Item weight:** 18 Pounds

## Images

![classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000 - Image 1](https://m.media-amazon.com/images/I/61LHQUpxWAL.jpg)
![classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000 - Image 2](https://m.media-amazon.com/images/I/711kAiR0H9L.jpg)
![classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000 - Image 3](https://m.media-amazon.com/images/I/71kc5yphBXS.jpg)
![classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000 - Image 4](https://m.media-amazon.com/images/I/71Urviu0AoS.jpg)
![classAcustoms Class A Customs | Under Mount 30 Gallon RV Concession Fresh and Gray Water Holding Tank | UM-3000 - Image 5](https://m.media-amazon.com/images/I/81Wm6nYQI9L.jpg)

## Questions & Answers

**Q: Would this tank be strong enough to use in the bed of a pickup truck for mobile car detailing without warping or breaking?**
A: Yes it would be strong enough but definitely too small.  It’s not made for mobile car wash.  You need a much much bigger tank

**Q: if vented can a garden hose be fitted to it?**
A: All water tanks we carry must be vented, they are not pressurized tanks.
You must allow air to move in and out when filling and emptying the tank. Do NOT fill the tank directly from a pressurized line (garden hose), this is not a safe option and will explode the tank. We recommend using a fill dish to allow for gravity feeding of the tank, please review our plumbing example for more information.

The fill dish is located on the outside of your unit so that you can easily add water to your tank without the need of opening a compartment or climbing under your unit. You can find the fill dishes in the Plumbing Category.
*For adding water to the Water Tank you need a Gravity Fill Dish, the hose rests in the port it does not screw onto the port this allows you to place a garden hose into the Gravity Fill Dish port without making a sealed connection so the supply is not pressurized.
*For using water directly from a garden hose you need a City Fill Dish, the hose makes a sealed connection and the water supply is pressurized, you can not hook this to your water tank and you do not need to go through your water pump.

*But what if I only turn the garden hose on half way?
Customers who do this still explode the tank because you can not determine the pressure of the water flowing only the amount of water.

*I am not using a fill dish how can I fill the tank?
We recommend you place a fitting in the tank that will allow you to rest the hose in to fill, not make a sealed connection, you can then cap this when not in use. You can use an elbow fitting to allow you the fill the tank to capacity, use an elbow with a screen secured over it to vent the tank.

*Can I put a cap on and off of the tank?
If you are needing to use a fitting by adding and removing a cap, remember tank must be vented allowing air in/out during use, we recommend you place a fitting in the tank and a cap on that fitting in order to prevent damage to the tank fitting.

**Q: What is the highest temperature water this tank can support?**
A: NSF Testing on Tank Material - Domestic hot - The temperature used during testing is 60 +/- 2°C (140 +/- 4 °F) and appears in Listings as "D. Hot". This is intended to apply to product applications where the product is used for either cold (ambient temperatures) or hot water up to domestic hot temperatures.

**Q: What is the recommended mounting materials such as brackets/angle iron and where should they be positioned on the tank for mounting under a van frame?**
A: Tanks can be installed inside or outside of unit, for food vendors verify requirements before purchasing as some areas do not allow tanks to be outside of the unit and others do not allow the tank to be inside of the unit.
Be sure to Sanitize Tank before installing.

All tanks must be braced and secured to prevent any movement of the tank while in transit and to prevent possibility of tank tipping or falling.
Due to the manufacturing process all the tanks especially the larger in size will have a bowing to the walls, when the tank is filled the tank will expand out removing the inward bow, we recommend laying all tanks on a level surface (this can be angled to help with drainage) and bracing the tanks. For larger tanks it is recommended to brace all side walls with plywood or metal, we do not recommend using ratchet straps on the tanks alone as this is a large amount of weight on a thin strip and may cause cutting into the tank. For tanks placed outside it is also recommend to enclose tanks using sheet metal / plywood or some other type of weather proof material to prevent damage from road debris and speed bumps, be sure to check your clearance before ordering.

Brackets or Strap Systems Due to the variety of installations we do not carry brackets or bracing systems

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-27*