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.

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

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

Water filter plumbing connections completed by Andy Plumbers

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

How We Work

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

1

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.

2

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.

3

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.

Last reviewed April 2026 by Andy Plumbers