---
product_id: 75926820
title: "3M AP420 Large Scale Prevention System"
brand: "aqua-pure"
price: "R3864"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Aqua Pure"
url: https://www.desertcart.co.za/products/75926820-3m-ap420-large-scale-prevention-system
store_origin: ZA
region: South Africa
---

# Whole-house soft water 2-in-1 filtration + scale prevention NSF certified durability 3M AP420 Large Scale Prevention System

**Brand:** aqua-pure
**Price:** R3864
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your home’s water game — because soft water is the new luxury!

## Quick Answers

- **What is this?** 3M AP420 Large Scale Prevention System by aqua-pure
- **How much does it cost?** R3864 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/75926820-3m-ap420-large-scale-prevention-system)

## Best For

- aqua-pure enthusiasts

## Why This Product

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

## Key Features

- • **Sleek Transparent Design:** Modern blue-transparent casing fits seamlessly into upscale villas and flats without compromising style.
- • **Extend Appliance Lifespan:** Prevents sediment buildup and corrosion, keeping your home’s systems running efficiently longer.
- • **Trusted NSF Certification:** Backed by rigorous testing for guaranteed water purity and system reliability.
- • **Effortless Whole-Home Softening:** Centralized installation at primary inlet ensures every tap delivers silky smooth water.
- • **Dual-Action Filtration & Scale Defense:** Combines superior depth filtration with siliphos technology to protect pipes and appliances.

## Overview

The 3M AP420 Large Scale Prevention System is a fully automatic, NSF-certified water softener designed for whole-house use. Installed at the primary water inlet, it combines advanced siliphos scale prevention with 5-micron depth filtration to reduce sediment, corrosion, and hardness. Ideal for villas and individual flats, this system extends appliance life and ensures consistently soft, clean water throughout your home.

## Description

3M fully automatic water softener 200 gives you soft water for the entire house. Install it at the primary water inlet to your villa or apartment to get centralized soft water for the entire house. The softener uses ion exchange technology with high quality, high life resin. The system comes with a AP80X series filtration system which filters all impurities upto 5 micron through 3M's unique depth filtration technology.

Review: Super product - I like this product very useful
Review: Would Highly recommend to anybody who has 3M whole house filter AP141T - This cartridge is of the same quality as was in the original filter. Would Highly recommend to anybody who has 3M whole house filter AP141T.

## Features

- Color: TranSParent and blue
- Call 1800 425 425 000 for guide on right product selection and installation services
- 2-in-1 action of filtration and scale prevention for the whole house or appliances
- Removes the effects of hardness using siliphos technology with superior depth filtration technology
- Keeps appliances working efficiently for longer
- Suitable for villas or individual flats
- Installed at primary inlet of water to the house
- Reduces sediment build up, corrosion and scale formation
- Warranty: 1 year on product
- Includes: Large fully automatic water softener

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003VT7F0A |
| Are batteries included? | No |
| Best Sellers Rank | #45,248 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Water Purification System Accessories |
| Brand | Aqua-Pure |
| Colour | Transparent and Blue |
| Country of Origin | USA |
| Customer Reviews | 4.2 4.2 out of 5 stars (67) |
| Date First Available | 9 May 2013 |
| External Testing Certification | NSF |
| Global Trade Identification Number | 50051128888419 |
| Included Components | Large fully automatic water softener |
| Item Dimensions LxWxH | 24.8 x 6.4 x 6.4 Centimeters |
| Item Height | 2.5 Inches |
| Item Weight | 907 g |
| Item Width | 2.5 Inches |
| Item model number | 5527407 |
| Manufacturer | 3M |
| Material | Plastic |
| Model number | 5527407 |
| Net Quantity | 1 Count |
| Number of Items | 2 |
| Power Source | gravity |
| Product Benefits | Reduces Sediment, Removes Impurities |
| Product Dimensions | 24.77 x 6.35 x 6.35 cm; 907.18 g |
| Set Name | 3M AP420 Large Scale Prevention System |
| Special Feature | automatic |

## Product Details

- **Brand:** Aqua-Pure
- **External Testing Certification:** NSF
- **Item Weight:** 907 g
- **Material:** Plastic
- **Product Benefits:** Reduces Sediment, Removes Impurities

## Images

![3M AP420 Large Scale Prevention System - Image 1](https://m.media-amazon.com/images/I/21OH9eIdJ4L.jpg)
![3M AP420 Large Scale Prevention System - Image 2](https://m.media-amazon.com/images/I/21Qx02FaS5L.jpg)
![3M AP420 Large Scale Prevention System - Image 3](https://m.media-amazon.com/images/I/41j9dzOpOBL.jpg)
![3M AP420 Large Scale Prevention System - Image 4](https://m.media-amazon.com/images/I/41jbVhLGQ3L.jpg)
![3M AP420 Large Scale Prevention System - Image 5](https://m.media-amazon.com/images/I/51Ev4pIZz7L.jpg)

## Questions & Answers

**Q: Will it work with pentek pentek-150072#10 standard blue/clear filter housing, 3/4"?**
A: I use the AquaPure AP420 cartridge which measures 9-7/8" by 2-3/4" Part No. 5560907. It works well for scale and iron (rust). I recommend contacting the filter housing manufacturer to check with them.

**Q: I am using this filter but just in a few days I see the color turning reddish due to iron filtration. Will this affect the performance ?**
A: First, I love these filters and they work very well.  Yes they start working immediately and catch a lot of iron and manganese.  I change mine every three months or so or after I begin to see iron start to 'show up' in a toilet.  Water flow is never impacted but if your iron / manganese content (i am assuming you are on a well) then you need to seek a whole house filter  as a solution.

**Q: Number of cartridges in box? This is usually sold as a pack of two cartridges for the price they have posted.**
A: This should be a package of 2 of the AP420 cartridges.

**Q: how does ap420 filter out the scale**
A: Honestly, I have no idea how it works, but I have been using it for more than 5 years and the flecks of scale are clearly visible on the outside of the filter after several months of use, or sometimes sooner.  We had major problems with our hot water heater and plumbing fixtures due to scale, and this filter seems to have solved the problem.  Hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Super product
*by L***N on 10 July 2020*

I like this product very useful

### ⭐⭐⭐⭐⭐ Would Highly recommend to anybody who has 3M whole house filter AP141T
*by J***S on 20 October 2016*

This cartridge is of the same quality as was in the original filter. Would Highly recommend to anybody who has 3M whole house filter AP141T.

### ⭐⭐⭐⭐⭐ Excellent
*by A***A on 27 March 2019*

Very good.

## Frequently Bought Together

- 3M Aqua-Pure Whole House Standard Sump Replacement Water Filter Drop-in Cartridge AP420, 5560907
- Aqua-Pure ap117 Model AP117NP 5541705 Whole House Standard Diameter Replacement Filter (Pack of 2)
- 3M Aqua-Pure Whole House Std. Dia. Stainless Steel Filter Housing SST1HA. Heavy Duty Construction, Built to Last

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