---
product_id: 21681533
title: "Icon 437 22-1/2\" x 18-1/2\" x 6\" Bottom Drain Holding Tank"
brand: "icon"
price: "4866 DH"
currency: MAD
in_stock: true
reviews_count: 10
category: "Icon"
url: https://www.desertcart.ma/products/21681533-icon-437-22-1-2-x-18-1-2-x
store_origin: MA
region: Morocco
---

# Includes 3 fittings—threaded, slip, and flange—no extra parts needed 8-gallon capacity with bottom drain for efficient waste management Built-in reinforcements for direct toilet mounting Icon 437 22-1/2" x 18-1/2" x 6" Bottom Drain Holding Tank

**Brand:** icon
**Price:** 4866 DH
**Availability:** ✅ In Stock

## Summary

> 🚽 Elevate your RV setup with the tank that’s built to fit, last, and impress!

## Quick Answers

- **What is this?** Icon 437 22-1/2" x 18-1/2" x 6" Bottom Drain Holding Tank by icon
- **How much does it cost?** 4866 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/21681533-icon-437-22-1-2-x-18-1-2-x)

## Best For

- icon enthusiasts

## Why This Product

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

## Key Features

- • **Durable HDPE Build:** Crafted from high-density polyethylene for long-lasting, leak-resistant performance on the road.
- • **Space-Smart Design:** Compact 22.5" x 18.5" x 6" footprint fits perfectly under tight RV or bus conversions.
- • **Effortless Drainage:** Bottom drain design ensures quick, clean emptying—keeping your setup hygienic and hassle-free.
- • **Plug & Play Fittings:** Comes complete with 3" threaded, 2" slip, and 3" flange fittings—zero guesswork, zero extra purchases.
- • **Mount with Confidence:** Reinforced structure supports direct toilet installation—no extra mounting hassle.

## Overview

The Icon 437 Bottom Drain Holding Tank is a compact, 8-gallon HDPE tank designed for seamless toilet mounting in RVs and bus conversions. Featuring built-in reinforcements and a complete set of fittings, it eliminates installation guesswork. Its bottom drain ensures efficient waste disposal, making it a top choice for space-conscious professionals seeking reliable, no-fuss plumbing solutions.

## Description

This tank has reinforcements built right in so you can mount a toilet directly on top of it. The holding tank comes with a 3" Threaded Fitting, a 2" Slip Fitting and a 3"ID/7"OD Flange Fitting. No additional fittings are needed. All seams are solvent welded and have a 1-1/4" mounting flange.

Review: Great product - Exactly what I needed for my travel trailer, since there isn't space under it.
Review: Quality is evident - I really like that I don't have to install this under my bus conversion. It just fits right under the toilet. I thought I read that some people said that the outlet opening is 1.5 inches. Mine is definitely 3 inches. Haven't put it in yet but it just looks to be a quality product.

## Features

- Built-in reinforcements for mounting a toilet
- Includes: 3" Threaded Fitting, a 2" Slip Fitting and a 3"ID/7"OD Flange Fitting
- No additional fittings are needed
- Features a bottom drain and an 8 gallon holding capacity
- Dimensions: 22.5" x 18.5" x 6"

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0058SQFRG |
| Best Sellers Rank | #260,290 in Automotive ( See Top 100 in Automotive ) #19 in RV Black Water Tanks |
| Brand | ICON |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (133) |
| Date First Available | June 30, 2011 |
| Drain Type | Bottom Drain |
| Finish Type | Unpolished |
| Global Trade Identification Number | 00628423004377 |
| Installation Type | built-in |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1 pounds |
| Item model number | 437 |
| Manufacturer | Icon Technologies Limited RV |
| Manufacturer Part Number | 437 |
| Material | High Density Polyethylene (HDPE) |
| Model | 00437 |
| Product Care Instructions | Wipe with Dry Cloth |
| Product Dimensions | 23.5"D x 18.8"W x 7.1"H |
| Shape | Rectangular |
| Size | 1 x 152 cm |
| Style | Modern |
| UPC | 628423004377 |

## Product Details

- **Brand:** ICON
- **Color:** Black
- **Material:** High Density Polyethylene (HDPE)
- **Product Dimensions:** 23.5"D x 18.8"W x 7.1"H
- **Size:** 1 x 152 cm

## Images

![Icon 437 22-1/2" x 18-1/2" x 6" Bottom Drain Holding Tank - Image 1](https://m.media-amazon.com/images/I/51c1ii4VxuL.jpg)
![Icon 437 22-1/2" x 18-1/2" x 6" Bottom Drain Holding Tank - Image 2](https://m.media-amazon.com/images/I/511DZePLOgL.jpg)

## Questions & Answers

**Q: How many gallons? can we can an accurate amount not a guess**
A: we bought one and it holds 10 gallons

**Q: Did have the location measurement of the hole in the bottom?**
A: The hole is in the exact center measuring from front to back, and from side to side. It is also threaded.

**Q: What is the location of the top drain?**
A: I think it is in the middle like all toilets.

**Q: Can i use a residential toilet, or do i have to use an rv toilet?**
A: I'd recommend a rv toilet. They are really light weight. I used a rv toilet and I could feel it flex a little when I sit on it. Porcelain toilets are on the heavy side.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by J***O on October 30, 2025*

Exactly what I needed for my travel trailer, since there isn't space under it.

### ⭐⭐⭐⭐⭐ Quality is evident
*by L***. on February 27, 2021*

I really like that I don't have to install this under my bus conversion. It just fits right under the toilet. I thought I read that some people said that the outlet opening is 1.5 inches. Mine is definitely 3 inches. Haven't put it in yet but it just looks to be a quality product.

### ⭐⭐⭐⭐⭐ New Black Tank
*by K***A on November 8, 2020*

Purchased this to replace the recirculating toilet in my Trailmanor. Easy to install and only needed to move the existing drain pipe about 1.5 inches. Able to mount a low profile directly on top. Added trim around the tank and now I have a much better toilet in my camper.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ma/products/21681533-icon-437-22-1-2-x-18-1-2-x](https://www.desertcart.ma/products/21681533-icon-437-22-1-2-x-18-1-2-x)

---

*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-18*