Under-Sink Water Filter Installation in Randburg

Clean, filtered drinking water straight from your kitchen tap. Professional plumber-installed carbon, ultrafiltration and reverse osmosis systems across Randburg, Fairland and Northcliff.

Carbon Filters

Water filtration system installed under counter in Fairland home

Ultrafiltration

Reverse Osmosis

We haven't bought a single bottle of water in four months.

A family in Parkhurst had been buying bottled water for years. Not because the municipal water was unsafe — Rand Water does a solid job treating it — but because the taste put them off. The chlorine smell was strong, especially in summer when treatment levels go up. They'd fill glasses from the tap and it tasted like a swimming pool.

They were spending over R800 a month on 5-litre bottles. It added up. And the plastic waste bothered them too.

We installed an under-sink carbon block filter in their kitchen. The whole job took about two hours. We connected it to a dedicated filter tap next to the main kitchen tap, tested the pressure, checked for leaks, and ran water through until the carbon was flushed.

The husband filled a glass, tasted it, and said: "That's it? That's all it needed?"

Their monthly bottled water spend dropped to zero. The filter cartridge costs a fraction of what they were paying for bottles. And the water tastes clean — because it is. If you're exploring your options, have a look at our full water filtration and water purification pages for a broader view of what we offer.

Under-Sink Filter Systems We Install

The right filter depends on your water source, what you want to remove, and your budget. We install all three main types and help you choose the one that makes sense for your home.

Carbon Block Filters

The most common choice for Johannesburg municipal water. Carbon block filters remove chlorine, bad taste, odour and sediment. They're affordable, effective and easy to maintain.

Removes chlorine and taste issues
Filters sediment and particles
6-12 month cartridge life
Compact under-sink fit
Most affordable option

Ultrafiltration Systems

A step up from carbon. Ultrafiltration removes bacteria and fine particles while keeping beneficial minerals in the water. A good choice for families with young children.

Removes bacteria and cysts
Retains healthy minerals
No electricity required
12-24 month membrane life
No water waste

Reverse Osmosis Systems

The most thorough filtration available. RO systems remove virtually everything — heavy metals, fluoride, dissolved solids, bacteria. 5-6 stage purification for the purest drinking water.

Removes 95-99% of contaminants
Heavy metals and fluoride removal
5-6 stage purification
Storage tank included
2-3 year membrane life

View our AquaShield RO system

Recent Filter Installations

Neat, professional installations under kitchen sinks across Randburg and surrounding suburbs.

Under-sink carbon filter installation in Fairland kitchen

Under-Sink Filter Installation

Fairland - Carbon block system with dedicated tap

Multi-stage water filter system installed in Northcliff home

Multi-Stage Filter System

Northcliff - Ultrafiltration with pre-filter

Filter Plumbing Connections

Blairgowrie - Clean connections, no leaks

Completed reverse osmosis water filter installation in Randburg

Completed RO Installation

Linden - Full reverse osmosis system with storage tank

Why Your Water Filter Should Be Installed by a Plumber

Buying a filter is easy. Installing it properly is where most people get stuck. Here's why a qualified plumber makes the difference.

A lot of water filter companies sell the unit and then send a general handyman or even a sales rep to install it. We've been called out to fix installations where fittings were hand-tightened, T-pieces were the wrong size, and drain connections on RO systems were leaking into the cupboard.

An under-sink filter connects directly into your pressurised water supply. If the connections aren't done properly, you get leaks — and under a kitchen sink, you might not notice until the cupboard floor is warped and mould is growing behind the kickboard.

Proper Pressure Testing

We test every connection under full municipal pressure. No slow drips, no surprise leaks two weeks later. We know the pressure ranges in Randburg homes and size fittings accordingly.

Leak-Free Connections

We use proper compression fittings, thread tape and isolating valves. Every joint is tested. If a filter ever needs servicing or replacing, the isolation valve means you don't have to turn off your entire water supply.

Correct Placement and Flow

Filters need adequate space for cartridge changes. RO systems need a drain connection and sometimes an electrical outlet. We plan the layout before we start, so everything fits neatly and is accessible for future maintenance.

Warranty Compliance

Many filter manufacturers require installation by a qualified plumber to keep the warranty valid. A DIY installation or handyman job can void your product warranty. We provide proof of professional installation.

How We Work

From choosing the right system to clean, tested installation — here's what to expect.

Water Assessment

We ask about your water source (municipal or borehole), what concerns you about your water, and how you use it. If you're on borehole water, we recommend a water test first so we know exactly what needs filtering.

System Selection

Based on your water quality, budget and space under the sink, we recommend the right filter type. We explain what each system removes and what it doesn't — no overselling, just honest advice.

Professional Installation

We install the system with proper fittings, isolation valves and pressure testing. We flush the new cartridges, check flow rate, and show you how the system works. Clean, tested and ready to use.

Why Choose Andy Plumbers

No More Bottled Water Costs

Most families in Randburg spend R500 to R1,000 a month on bottled water. A properly installed filter pays for itself within months. Clean water straight from the tap, every day.

Installed by a Registered Plumber

Not a salesperson, not a handyman. A qualified plumber who understands water pressure, pipe sizing and leak-free connections. That's the difference between a filter that works and one that floods your cupboard.

Correct Pressure and Flow

We ensure your filter doesn't reduce water pressure to a trickle. Proper sizing, correct fittings and pressure regulation mean your filtered water flows at a usable rate, not a frustrating drip.

Annual Maintenance Service

Filters need cartridge replacements to keep working properly. We offer an annual service where we swap cartridges, check connections, test pressure and make sure everything is still performing as it should.

Frequently Asked Questions

How long does an under-sink water filter installation take?

Most under-sink filter installations take between 1.5 and 3 hours, depending on the system type and your existing plumbing. A simple carbon block filter is quicker. A reverse osmosis system with a storage tank takes longer because of the additional plumbing and drain connection. We always pressure-test and check for leaks before we leave.

Which water filter is best for Johannesburg municipal water?

For most homes in Randburg and greater Johannesburg, a carbon block filter is the best starting point. It removes chlorine, bad taste, odour and sediment from Rand Water-treated municipal supply. If you want additional protection against bacteria or fine particles, an ultrafiltration system is the next step up. Reverse osmosis is ideal if you want the purest drinking water possible or have concerns about heavy metals and dissolved solids.

How often do water filter cartridges need replacing?

Carbon block filters typically need new cartridges every 6 to 12 months. Ultrafiltration membranes last 12 to 24 months. Reverse osmosis membranes last 2 to 3 years, though the pre-filters and post-filters in an RO system need replacing every 6 to 12 months. We offer an annual maintenance service where we replace cartridges and check the system.

Can you install a water filter on borehole water?

Yes, but borehole water is different from municipal water. It often contains iron, manganese, nitrates or bacteria that a basic carbon filter won't remove. We recommend getting your borehole water tested first so we can recommend the right filtration system. In many cases, an ultrafiltration or reverse osmosis system is needed for borehole water to be safe for drinking.

Do you supply the water filter or can I buy my own?

Both options work. We supply and install quality filter systems, including our featured AquaShield reverse osmosis purifier. But if you've already purchased a filter unit online or from a store, we're happy to install it for you. We just ask that you check with us first so we can confirm the unit is compatible with your plumbing and that all fittings are included.

Get Your Water Filter Quote

Whether you want a simple carbon filter to sort out the chlorine taste, or a full reverse osmosis system for the purest drinking water — we'll help you choose the right system and install it properly. No mess. No leaks. Just clean water.

Get a Quote Call 011 477 1118