---
product_id: 5702783
title: "Thetford Fresh Water Tank Sanitizer Detergent and Treatment - 2 x 24 oz Bottles, Color: Clear PN 36662"
brand: "thetford"
price: "€ 34.02"
currency: EUR
in_stock: true
reviews_count: 8
category: "Thetford"
url: https://www.desertcart.ie/products/5702783-thetford-fresh-water-tank-sanitizer-detergent-and-treatment-2-x
store_origin: IE
region: Ireland
---

# Kills 99% harmful bacteria 2-step detergent + sanitizer system Versatile for RVs, boats & campers Thetford Fresh Water Tank Sanitizer Detergent and Treatment - 2 x 24 oz Bottles, Color: Clear PN 36662

**Brand:** thetford
**Price:** € 34.02
**Availability:** ✅ In Stock

## Summary

> 💧 Stay Fresh, Stay Fearless: Clean Water On-The-Go!

## Quick Answers

- **What is this?** Thetford Fresh Water Tank Sanitizer Detergent and Treatment - 2 x 24 oz Bottles, Color: Clear PN 36662 by thetford
- **How much does it cost?** € 34.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/5702783-thetford-fresh-water-tank-sanitizer-detergent-and-treatment-2-x)

## Best For

- thetford enthusiasts

## Why This Product

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

## Key Features

- • **Long-Lasting Protection:** Proven to keep tanks fresh for months—stay ahead of odors and contamination, no more last-minute scrambles.
- • **Powerful 2-Step Cleanse:** Detergent cleans grime; sanitizer kills 99% of bacteria including E. coli & Staph—your water’s new best friend.
- • **Safe & Odorless Formula:** Bleach- and chlorine-free, leaves zero smell or taste—pure hydration without the chemical aftertaste.
- • **Ultimate Freshness, Anywhere:** Sanitizes fresh water tanks in RVs, boats, trailers, and more—never compromise on clean water.
- • **Effortless Maintenance Routine:** Easy-to-use dosing system with clear instructions—keep your water system pristine with minimal effort.

## Overview

Thetford Fresh Water Tank Sanitizer is a bleach-free, two-part detergent and sanitizer system designed to clean and disinfect fresh water tanks and plumbing in RVs, boats, campers, and trailers. It kills 99% of harmful bacteria including E. coli and Staphylococcus, leaving no odor or taste. Easy to use with precise dosing, it ensures long-lasting freshness and safe water for all your adventures.

## Description

Thetford's Fresh Water Tank Sanitizer is an easy-to-use 2-part system designed for cleaning and sanitizing fresh water tanks and plumbing on RVs, trailers, campers, boats, water coolers, coolers, ice machines, refrigerators, ice chests, or any washable hard, non-porous surfaces.Step 1: Clean with the detergentEmpty the tank and add 1 ounce of concentrated detergent solution to the fresh water tank for every 4 gallons of tank capacity.Fill the tank with water and run the diluted detergent through each faucet, shower, and water outlet for 1 minute or more.Empty the tank and rinse the faucet lines and tank by running fresh water through them.Step 2: Sanitize the waterShut off incoming water line and prepare a solution of 2 ounces of product per 8 gallons of water.Apply or circulate solution to wet all surfaces, allowing it a minimum contact of 60 seconds.Drain the solution and return to service by reopening incoming water lines.The treatment is effective even in hard water and will not leave grit or soap scum. Not a drinking water additive.

Review: Who knew?? - There’s a learning curve with the first RV. Water was one of those things. After each trip we ran the faucets until the tank was empty. Or so we thought. Turns out it’s very important to pull the plug draining the tank from below AND pull the plug to empty the water heater. We didn’t. Pretty soon our water smelled very nasty. We put bleach into the tank, drove it around to slosh it around. Still nasty. I did some research and found this product so I bought it. Followed the directions and now our water is fresh as can be. There’s zero scent to our water. Worth every penny to have a clean system. We also bought a “wand thingy” that sprays into the water heater to clean it out right before we used this product. Some sediment came out with that. I think using both this product and the sprayer are both good practices to keep everything clean.
Review: Use on the fresh water tank of boat - I used this to clean and sanitize the freshwater tank of my boat. Somehow I got some odor in the 30 gal tank even using a capful of bleach. This Sanitizer freshened it right up. Just use as directed. flush system until water shows no foam. Water tank hose been fresh for 6 months now.

## Features

- [VERSATILITY]: Thetford's Fresh Water Tank Sanitizer works in RVs, trailers, campers, and boats
- [FUNCTIONALITY]: Cleans and sanitizes the inside of the freshwater tanks and the plumbing
- [UTILITY]: Kills 99% of the harmful bacteria, including Staphilococcus, E-Coli, Listeria, and other micro-organisms
- [CONVENIENCE]: Easy-to-use 2-part system for cleaning and sanitizing the fresh water tank
- [SAFETY]: Free of bleach and chlorine, leaves no smell or taste

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001TIV1KA |
| Best Sellers Rank | #118,886 in Health & Household ( See Top 100 in Health & Household ) #341 in Hand Sanitizers |
| Brand | Thetford |
| Customer Reviews | 4.5 4.5 out of 5 stars (628) |
| Date First Available | February 19, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.9 ounces |
| Item model number | 36662 |
| Manufacturer | Thetford |
| Manufacturer Part Number | 36662 |
| Model | Thetford Fresh Water Tank Sanitizer Detergent and Sanitizer Treatment, 2 x 24 oz |
| Special Features | Not_Performance_Used |

## Product Details

- **Brand:** Thetford
- **Item Form:** Liquid
- **Item Volume:** 24 Fluid Ounces
- **Scent:** Fresh
- **Specific Uses For Product:** Faucet, Refrigerator, Shower

## Images

![Thetford Fresh Water Tank Sanitizer Detergent and Treatment - 2 x 24 oz Bottles, Color: Clear PN 36662 - Image 1](https://m.media-amazon.com/images/I/61v903G84sL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Who knew??
*by J***E on July 25, 2025*

There’s a learning curve with the first RV. Water was one of those things. After each trip we ran the faucets until the tank was empty. Or so we thought. Turns out it’s very important to pull the plug draining the tank from below AND pull the plug to empty the water heater. We didn’t. Pretty soon our water smelled very nasty. We put bleach into the tank, drove it around to slosh it around. Still nasty. I did some research and found this product so I bought it. Followed the directions and now our water is fresh as can be. There’s zero scent to our water. Worth every penny to have a clean system. We also bought a “wand thingy” that sprays into the water heater to clean it out right before we used this product. Some sediment came out with that. I think using both this product and the sprayer are both good practices to keep everything clean.

### ⭐⭐⭐⭐⭐ Use on the fresh water tank of boat
*by R***. on October 13, 2024*

I used this to clean and sanitize the freshwater tank of my boat. Somehow I got some odor in the 30 gal tank even using a capful of bleach. This Sanitizer freshened it right up. Just use as directed. flush system until water shows no foam. Water tank hose been fresh for 6 months now.

### ⭐⭐⭐⭐⭐ Satisfied.
*by T***L on September 4, 2025*

I tried this. Not sure if it was the better choice over regular chlorine. But I assume it is less harsh than diluting chlorine and damaging the plastic and PVC piping in the motor home. I removed all filtration before using and flushed out several tanks of water before putting back into service. I didn’t notice any chemical smell or foaming in the water afterwards.

## Frequently Bought Together

- Thetford Fresh Water Tank Sanitizer Detergent and Sanitizer Treatment, 2 x 24 oz bottles - Thetford 36662
- RV Inline Sanitizer - The Easiest way to HELP YOU disinfect your RV Fresh Water Tank, NO MESS, NO MOVING PART, just connect with the Hose and add Bleach
- Camco Tastepure RV Water Filter - New & Advanced RV Inline Water Filter with Flexible Hose Protector - GAC & KDF Filtration - Made in USA - Camping Essentials for Fresh Drinking Water (40043)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-17*