---
product_id: 171746038
title: "Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400"
brand: "classacustoms"
price: "€ 308.55"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.com.cy/products/171746038-class-a-customs-14-gallon-rv-waste-black-water-holding
store_origin: CY
region: Cyprus
---

# 3” ABS Fixed Outlet 14 Gallon Capacity Made in USA MDPE Resin Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400

**Brand:** classacustoms
**Price:** € 308.55
**Availability:** ✅ In Stock

## Summary

> 🚐 Upgrade your RV’s backbone with the tank that keeps you moving—no leaks, no limits!

## Quick Answers

- **What is this?** Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400 by classacustoms
- **How much does it cost?** € 308.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/171746038-class-a-customs-14-gallon-rv-waste-black-water-holding)

## 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

- • **Seamless One-Piece Design:** No weak points or seams to burst—engineered for reliability under all your adventures.
- • **Generous 14-Gallon Capacity:** Perfectly sized for extended RV trips and tiny homes—never worry about frequent dumps again.
- • **Durable American Craftsmanship:** Built in the USA with rugged Medium Density Polyethylene for long-lasting, leak-resistant performance.
- • **Pro-Grade Outlet Compatibility:** 3” ABS female pipe outlet designed for secure, professional-grade plumbing connections.
- • **Customizable Inlet & Vent Placement:** You decide the best setup for your rig—flexibility that fits your unique installation needs.

## Overview

The Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400 is a robust, seamless, one-piece polyethylene tank designed exclusively for waste and gray water use in RVs, campers, trailers, and tiny homes. Made in the USA, it features a fixed 3” ABS female outlet and requires user-installed inlet and vent fittings. Engineered for durability and easy integration, this tank offers a reliable, professional-grade solution for managing black water on the road.

## 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: Waste water - We installed it in our bbq trailer. It fit like a charm. We are using it for the drained water from the sink. The nozzle for emptying out was a perfect size to darin.
Review: 2 Years on a Small Travel Trailer, working great - Installed on a 2001 Palomino Stampede after the original 5 gallon tank cracked on the top. The original tank was under the toilet above the floor (Found out the hard way the tank was cracked, yuck). Purchased this tank and mounted it under the trailer (Next to the gray tank which was already under the trailer), been using it for 2+ years now and am very happy with the tank thus far. Camping is primarily in areas where the temperatures do not hit the freezing point, so don't have any view if there would be an issue.

## Features

- 14 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 | B07Z5BF2WZ |
| Best Sellers Rank | #447,328 in Automotive ( See Top 100 in Automotive ) #35 in RV Black Water Tanks |
| Brand | classAcustoms |
| Capacity | 14 Gallons |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (216) |
| Date First Available | October 15, 2019 |
| Manufacturer | Class A Customs |
| Manufacturer Part Number | WT-1400 |
| Material | Polyethylene (PE), Polyvinyl Chloride (PVC), Resin |
| Model | WT-1400 |
| Product Dimensions | 40"L x 14.5"W x 7.98"H |
| Shape | Rectangular |

## Product Details

- **Brand:** classAcustoms
- **Capacity:** 14 Gallons
- **Color:** Black
- **Material:** Polyethylene (PE), Polyvinyl Chloride (PVC), Resin
- **Product Dimensions:** 40"L x 14.5"W x 7.98"H

## Images

![Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400 - Image 1](https://m.media-amazon.com/images/I/71UMxBp5TGL.jpg)

## Questions & Answers

**Q: Does anyone know where I can get a cap for the end of the pipe? Its outside diameter is 3-7/8". I want to seal it off completely.**
A: With my experience, I'd say check with a plumbing supply house.  I got fittings for my tank from a shop that works on RV's.

**Q: How do the lines from the sink and or toilet get plumbed into this tank ?**
A: INLET & VENT INSTALLATION
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.

Grommet or Uniseal will secure inlet/vent pipe with no adhesives needed. Use correct size hole saw bit in order to drill a hole in the tank and place Grommet or Uniseal in hole, piping is then placed in fitting with no glues or adhesives necessary.

**Q: Does mounting braces come with it**
A: No

**Q: Does it have a predrilled hole in top center?**
A: No. It does not have predrilled holes.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Waste water
*by J***O on August 13, 2025*

We installed it in our bbq trailer. It fit like a charm. We are using it for the drained water from the sink. The nozzle for emptying out was a perfect size to darin.

### ⭐⭐⭐⭐⭐ 2 Years on a Small Travel Trailer, working great
*by P***T on November 25, 2023*

Installed on a 2001 Palomino Stampede after the original 5 gallon tank cracked on the top. The original tank was under the toilet above the floor (Found out the hard way the tank was cracked, yuck). Purchased this tank and mounted it under the trailer (Next to the gray tank which was already under the trailer), been using it for 2+ years now and am very happy with the tank thus far. Camping is primarily in areas where the temperatures do not hit the freezing point, so don't have any view if there would be an issue.

### ⭐⭐⭐⭐⭐ Perfect for the enclosed trailer cargo trailer
*by J***E on August 2, 2021*

It fits between the beams with few inches to spare

## Frequently Bought Together

- Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400
- Valterra T50 3" Hub x 3" Bay with Cap Valve Assembly,Black
- ICON 12483 Rubber Grommet, 1-1/2"

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-02-24*