---
product_id: 19218213
title: "Outdoor Boiler Water Treatment Rust Inhibitor- ProTech 300 1 Gallon 128 oz"
brand: "alternative heating & supplies"
price: "€ 160.66"
currency: EUR
in_stock: true
reviews_count: 8
category: "Alternative Heating & Supplies"
url: https://www.desertcart.hr/products/19218213-outdoor-boiler-water-treatment-rust-inhibitor-protech-300-1-gallon
store_origin: HR
region: Croatia
---

# Outdoor Boiler Water Treatment Rust Inhibitor- ProTech 300 1 Gallon 128 oz

**Brand:** alternative heating & supplies
**Price:** € 160.66
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Outdoor Boiler Water Treatment Rust Inhibitor- ProTech 300 1 Gallon 128 oz by alternative heating & supplies
- **How much does it cost?** € 160.66 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/19218213-outdoor-boiler-water-treatment-rust-inhibitor-protech-300-1-gallon)

## Best For

- alternative heating & supplies enthusiasts

## Why This Product

- Trusted alternative heating & supplies brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

ProTech 300 Provides protection for your wood boiler from rust, corrosion, and scale. ProTech 300 boiler water treatment has been designed to be used in manufacturer's boiler treatment programs. Adding 1 gallon of ProTech 300 to 300 gallons of boiler fill water will yield +/- 1000 ppm nitrite. Suggested nitrite levels are: 750 ppm = Adequate, 1000 ppm = Good, 1500 ppm = Great. Dose the system accordingly to the required control levels set by your boiler manufacturer and your system's nitrite needs based on test results. You can determine the needs of your system by testing your boiler water using our do-it-yourself test kit. See our 300 Test kit.

Review: Does what we need it to do - We use this every year to keep our outdoor wood boiler running smoothly
Review: Heatmor - Great price

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Part Number | ProTech300 |
| Item Weight | 10.32 pounds |
| Package Dimensions | 12.68 x 6.5 x 6.42 inches |
| Item model number | ProTech300 |
| Is Discontinued By Manufacturer | No |
| Material | water based |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Outdoor Boiler Water Treatment Rust Inhibitor- ProTech 300 1 Gallon 128 oz - Image 1](https://m.media-amazon.com/images/I/81NMyo4mJcL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does what we need it to do
*by C***P on November 29, 2025*

We use this every year to keep our outdoor wood boiler running smoothly

### ⭐⭐⭐⭐⭐ Heatmor
*by H***R on August 17, 2025*

Great price

### ⭐⭐⭐⭐⭐ it dyes the water purple
*by T***8 on February 16, 2025*

I like that 1 gallon treats 300 gallon of water. Ihave been using pro tech over 10 years it works well

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**Shop now:** [https://www.desertcart.hr/products/19218213-outdoor-boiler-water-treatment-rust-inhibitor-protech-300-1-gallon](https://www.desertcart.hr/products/19218213-outdoor-boiler-water-treatment-rust-inhibitor-protech-300-1-gallon)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-11*