---
product_id: 21681533
title: "Icon 437 22-1/2\" x 18-1/2\" x 6\" Bottom Drain Holding Tank"
brand: "icon"
price: "S$375"
currency: SGD
in_stock: true
reviews_count: 8
category: "Icon"
url: https://www.desertcart.sg/products/21681533-icon-437-22-1-2-x-18-1-2-x
store_origin: SG
region: Singapore
---

# Compact 22.5" x 18.5" x 6" size fits tight spaces Includes 3 fittings—threaded, slip & flange, no extras needed 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:** S$375
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your RV setup with the ultimate no-fuss holding tank!

## 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?** S$375 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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

- • **Mount & Go:** Reinforced design lets you mount your toilet directly—no extra hardware hassle.
- • **Durable HDPE Build:** High-density polyethylene construction guarantees long-lasting, leak-resistant performance.
- • **All-Inclusive Fittings:** Comes with 3" threaded, 2" slip, and 3"ID/7"OD flange fittings—ready to install out of the box.
- • **Space-Smart Dimensions:** Slim 6" height and compact footprint perfect for tight RV or bus conversions.
- • **Bottom Drain Efficiency:** Integrated bottom drain ensures smooth, mess-free waste management.

## Overview

The Icon 437 Bottom Drain Holding Tank is a compact, 8-gallon HDPE tank designed for seamless toilet mounting with built-in reinforcements. It includes all necessary fittings—3" threaded, 2" slip, and 3"ID/7"OD flange—eliminating the need for additional parts. Its slim profile (22.5" x 18.5" x 6") fits perfectly in tight spaces like travel trailers and bus conversions, featuring a bottom drain for efficient waste disposal.

## 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 | #1,017,803 in Automotive ( See Top 100 in Automotive ) #100 in RV Black Water Tanks |
| Brand | ICON |
| Brand Name | ICON |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 132 Reviews |
| Drain Type | Bottom Drain |
| Finish Types | Unpolished |
| Global Trade Identification Number | 00628423004377 |
| Included Components | Icon 00437 Bottom Drain Holding Tank With all Fittings HT630BSBD - 22.5" x 18.5" x 6" |
| Installation Type | built-in |
| Item Dimensions D x W x H | 23.5"D x 18.8"W x 7.1"H |
| Item Height | 7.1 inches |
| Item Type Name | Icon 00437 Bottom Drain Holding Tank With all Fittings HT630BSBD - 22.5" x 18.5" x 6" |
| Item Weight | 1 Pounds |
| Manufacturer | Icon Technologies Limited RV |
| Manufacturer Warranty Description | Please contact us if you experience any issues within 30 days of receipt. |
| Material | High Density Polyethylene (HDPE) |
| Material Type | High Density Polyethylene (HDPE) |
| Model Number | 437 |
| 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 |
| Unit Count | 1.0 Count |

## 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/511DZePLOgL.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/51c1ii4VxuL.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.

### ⭐⭐⭐⭐⭐ High quality, Just brace it with a 6" board around the lip
*by P***S on February 15, 2024*

Great product and very easy to install

---

## 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.sg/products/21681533-icon-437-22-1-2-x-18-1-2-x](https://www.desertcart.sg/products/21681533-icon-437-22-1-2-x-18-1-2-x)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-09*