---
product_id: 414904924
title: "SI Scale Inhibitor"
brand: "calmag"
price: "R1660"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Calmag"
url: https://www.desertcart.co.za/products/414904924-si-scale-inhibitor
store_origin: ZA
region: South Africa
---

# Whole house limescale protection 15mm compression fittings Lifetime guarantee SI Scale Inhibitor

**Brand:** calmag
**Price:** R1660
**Availability:** ✅ In Stock

## Summary

> 🛠️ Say goodbye to limescale, hello to hassle-free water!

## Quick Answers

- **What is this?** SI Scale Inhibitor by calmag
- **How much does it cost?** R1660 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/414904924-si-scale-inhibitor)

## Best For

- calmag enthusiasts

## Why This Product

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

## Key Features

- • **Certified Reliability:** WRAS approved for guaranteed safety and performance in your home water system.
- • **Peace of Mind Warranty:** Backed by a lifetime guarantee, ensuring long-term protection and value.
- • **Effortless Installation:** Fits seamlessly with 15mm compression or pushfit fittings for quick setup.
- • **Comprehensive Home Defense:** Protects your entire plumbing system, including boilers and showers, from damaging limescale buildup.
- • **Chemical-Free Scale Control:** Uses magnetic technology to suspend limescale particles, eliminating the need for harsh chemicals.

## Overview

The Calmag SI Scale Inhibitor is a WRAS-approved magnetic device designed to prevent limescale buildup across your entire home plumbing system. Featuring easy 15mm compression fittings and adaptable pushfit compatibility, it offers chemical-free protection that keeps boilers and showers running smoothly. With a lifetime guarantee, it’s a smart, sustainable solution for millennial homeowners seeking reliable, low-maintenance water care.

## Description

Product Description The CalMag Magnetic Scale Inhibitor is suitable for installation on cold water lines for the prevention of limescale formation. The unit is supplied with 15mm compression fittings and can also be adapted for use with pushfit fittings. Set Contains: 1 x Calmag 15 mm

Review: I previously had a budget chemical limescale filter (still much more expensive than this item) which eventually was left for too long and clogged up, and so did the pipe connecting the filter and the electric shower. I was highly skeptical about the mechanism behind the magnetic limescale protection. Supposedly, the limescale is not removed but stays suspended in water, so it just does not stick to the pipes. However, I decided to buy this anyway as it fitted the gap left by the filter and was quite cheap. Few months on, the electric shower seems fine and even the shower head does not clog up as much.
Review: Les he mandado unas cuantas misivas y no se dan por enterados. Un e-mail a la casa matriz en la India hace una semana, y aún estan por contestar. Lo que se dice un timo.

## Features

- WRAS Approved Product
- 15 mm compression fittings
- Whole House Protection
- Lifetime Guarantee
- Protects Boiler

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000U1RZP2 |
| ASIN  | B000U1RZP2 |
| Batteries Included? | No |
| Batteries Required? | No |
| Customer Reviews | 4.4 4.4 out of 5 stars (222) |
| Customer reviews | 4.4 4.4 out of 5 stars (222) |
| Date First Available | 20 August 2012 |
| Date First Available  | 20 August 2012 |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 320 g |
| Item model number | SI-Calmag |
| Item model number  | SI-Calmag |
| Manufacturer | Calmag |
| Manufacturer  | Calmag |
| Number Of Pieces | 1 |
| Part number | SI-Calmag |
| Product Dimensions | 1 x 1 x 1 cm; 320 g |
| Product Dimensions  | 1 x 1 x 1 cm; 320 g |

## Images

![SI Scale Inhibitor - Image 1](https://m.media-amazon.com/images/I/51E9dF2DtUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***E on 15 March 2017*

I previously had a budget chemical limescale filter (still much more expensive than this item) which eventually was left for too long and clogged up, and so did the pipe connecting the filter and the electric shower. I was highly skeptical about the mechanism behind the magnetic limescale protection. Supposedly, the limescale is not removed but stays suspended in water, so it just does not stick to the pipes. However, I decided to buy this anyway as it fitted the gap left by the filter and was quite cheap. Few months on, the electric shower seems fine and even the shower head does not clog up as much.

### ⭐ Review
*by J***3 on 13 July 2020*

Les he mandado unas cuantas misivas y no se dan por enterados. Un e-mail a la casa matriz en la India hace una semana, y aún estan por contestar. Lo que se dice un timo.

### ⭐⭐⭐⭐ Review
*by J***D on 30 September 2012*

Bought this item as a replacement for one which didn't appear to be working.Very easy to fit. Extremely good price compared to others. Can't comment on whether it's doing a good job as the results are not visually apparent. Only time will tell and I must say this applies to all brands.

## Frequently Bought Together

- Calmag SI Scale Inhibitor
- ESI - Energy Saving Innovation Controls ESRTP4RF+ Wireless Programmable Room Thermostat, White
- Zilmet 0.16Ltr Potable Expansion Vessel Shock Arrestor & 15mm Tee

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-21*