---
product_id: 49101840
title: "Calmag SI-Calmag Scale Inhibitor"
brand: "calmag"
price: "S/.181"
currency: PEN
in_stock: true
reviews_count: 9
category: "Calmag"
url: https://www.desertcart.pe/products/49101840-calmag-si-calmag-scale-inhibitor
store_origin: PE
region: Peru
---

# Whole house scale protection 15mm compression fittings Lifetime guarantee Calmag SI-Calmag Scale Inhibitor

**Brand:** calmag
**Price:** S/.181
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Calmag SI-Calmag Scale Inhibitor by calmag
- **How much does it cost?** S/.181 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/49101840-calmag-si-calmag-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

- • **Built to Last:** Lifetime guarantee means your investment is protected indefinitely.
- • **Certified Reliability:** WRAS approved for guaranteed safety and performance you can trust.
- • **Effortless Installation:** 15mm compression fittings for quick, secure setup—no plumber needed!
- • **Comprehensive Home Defense:** Protects your entire water system from limescale buildup, including boilers.
- • **Maintenance-Free Operation:** No batteries or power required—set it and forget it for hassle-free scale prevention.

## Overview

The Calmag SI-Calmag Scale Inhibitor is a WRAS-approved magnetic device designed to prevent limescale buildup across your entire home water system. Featuring easy 15mm compression fittings and a lifetime guarantee, it protects boilers and plumbing without requiring batteries or maintenance, ensuring long-term efficiency and peace of mind.

## 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. Box Contains 1 x Calmag 15 mm

Review: Appears to work. - 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: Easy to fit - Time will tell if it makes a difference, but from experience, these do reduce limescale. Item was really easy to fit.

## Features

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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B000U1RZP2 |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | 239,044 in DIY & Tools (See Top 100 in DIY & Tools) 1,826 in Central Heating System Accessories |
| Customer Reviews | 4.5 4.5 out of 5 stars (234) 4.5 out of 5 stars |
| Date First Available | 2 Mar. 2010 |
| Guaranteed Software Updates Until | unknown |
| Item Model Number | SI-Calmag |
| Item Package Quantity | 1 |
| Item Weight | 320 g |
| Manufacturer | Calmag |
| Number Of Pieces | 1 |
| Part Number | SI-Calmag |
| Product Dimensions | 1 x 1 x 1 cm; 320 g |

## Images

![Calmag SI-Calmag Scale Inhibitor - Image 1](https://m.media-amazon.com/images/I/51E9dF2DtUL.jpg)
![Calmag SI-Calmag Scale Inhibitor - Image 2](https://m.media-amazon.com/images/I/51TjKvxwnwL.jpg)
![Calmag SI-Calmag Scale Inhibitor - Image 3](https://m.media-amazon.com/images/I/41tXnSn-ukL.jpg)

## Questions & Answers

**Q: Can these compression fittings be used directly on pex piping?**
A: Yes, just use a pipe inserts.

**Q: I filter and drink the tap water. Does it change the taste?**
A: There is a slight change for the better I have found

**Q: How long does this product last before replacing**
A: I have mine in a couple of years and still seems to be working fine

**Q: Does this work please? I have seen so many mixed reviews for other similar products.**
A: Yes it works but people need to read instructions and carry out annual maintenance, ie.replacing as per instructions!!!
Any scale reducer will reduce any scale from causing damage to appliances relying on water!!
As a plumber/boiler technician I believe that we should all have a type of scale reducer on the mains on the mains entering the building,so it covers most or all water units/appliances…..!!!!!!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Appears to work.
*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.

### ⭐⭐⭐⭐⭐ Easy to fit
*by M***L on 1 November 2022*

Time will tell if it makes a difference, but from experience, these do reduce limescale. Item was really easy to fit.

### ⭐⭐⭐⭐ Best installed by a competent plumber.
*by G***C on 11 May 2026*

Installed this product two years ago and its still working well. Plenty of soapy suds when showering and a reduction of in shower gel usage. Reduces furring of pipework and the coil in the hot water tank if a conventional hot water system is installed. Ideal in hard water areas. Will buy again. Gra. C.

## 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

---

## 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.pe/products/49101840-calmag-si-calmag-scale-inhibitor](https://www.desertcart.pe/products/49101840-calmag-si-calmag-scale-inhibitor)

---

*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-09-08*