Complete Borehole Installation: Everything Between the Drill Rig and Your Tap

Getting water from an underground aquifer into your kitchen tap involves a surprising number of components, and each one can be done well or cut short. This guide walks through every stage of a complete borehole installation in the order it actually happens, so you know what to look for on a contractor’s quote and what questions to ask before you sign anything.

Stage 1 — Siting and Permitting

Before any rig arrives, a competent installer will discuss where on your property to drill. Many will recommend a hydrogeological assessment or at least a basic geophysical survey to improve the odds of striking a usable aquifer. Siting is not guesswork, but it is also not an exact science — aquifer depth and yield vary enormously even across a single suburb.

On the regulatory side, South Africa’s National Water Act requires a water-use licence or registration for boreholes above a certain volume threshold. Your installer should be familiar with the Department of Water and Sanitation’s requirements and help you establish what registration applies to your situation. Drilling without the correct authorisation can create problems when you sell the property or if inspectors visit.

Stage 2 — Drilling and Casing

The drill rig is the most visible part of the job, but it is only the beginning. Once the borehole reaches the target depth — which can range from a few tens of metres to well over a hundred metres depending on your geology — the hole must be lined with casing.

Casing serves two purposes: it stops the borehole walls from collapsing, and it prevents surface water and contaminants from migrating down into the aquifer. Steel casing is common in harder rock formations; uPVC casing is used in softer or more corrosive conditions. A properly grouted annular seal between the casing and borehole wall is essential and is a detail worth specifically asking about. For a step-by-step look at what happens on site during this phase, the borehole drilling process explained step by step is worth reading before you meet with contractors.

The full picture of what drilling involves — including how contractors are vetted — is covered on the borehole drilling pillar page.

Stage 3 — Yield Testing and Water-Quality Analysis

Once the borehole is drilled and cased, the installer should conduct an airlift or pump test to determine the sustainable yield — how many litres per hour the borehole can reliably produce. This figure directly dictates what pump you can fit and what your realistic daily water budget is.

Equally important is a water-quality sample sent to a SANAS-accredited laboratory for analysis against SANS 241 (the 2024 South African drinking-water quality standard). Borehole water is not automatically safe to drink. It may carry dissolved minerals, nitrates, bacteria, or other contaminants that require treatment before the water reaches your taps. Skipping this test is a false economy — treatment is far cheaper when you know what you are dealing with upfront.

Stage 4 — Pump and Motor Selection

The pump is the heart of your system, and selecting the right one depends on the borehole’s yield, the static water level, the draw-down depth, and how far the water needs to travel to your tank. Undersizing costs you water pressure and flow; oversizing can dewater the borehole and burn out the motor.

Most residential boreholes use a submersible pump suspended on a rising main. Borehole pump installation costs explain the price drivers in detail, but as a Johannesburg reference point, a pump installed typically runs R15,000–R35,000. Your installer should provide the pump’s technical datasheet so you can verify it matches the borehole’s tested yield.

Pump specs, casing depth, water quality — there is a lot to verify before committing to one installer. Compare 3 free quotes — vetted installers, no obligation.

Stage 5 — Electrical Supply, Controls and Protection

A submersible pump needs a dedicated electrical supply, properly sized cabling, and a control panel. The control panel should include at minimum:

• A motor protection relay or variable frequency drive (VFD) to guard against dry-running, phase failure, and overloads
• A float switch or pressure sensor in the tank to prevent the pump running when the tank is full
• A borehole-level sensor or dry-run protection to cut the pump if the water level drops too low

Electrical work must be done by a registered electrician and must produce a Certificate of Compliance (CoC). If a quote does not mention a CoC, ask explicitly — it is a legal requirement and protects your insurance position.

Stage 6 — Storage Tank and Pipework

A borehole rarely delivers water at a rate that matches peak household demand, so almost all residential installations include an above-ground or below-ground storage tank. The pump fills the tank at its sustainable rate; a secondary pressure pump (or gravity, if your tank sits high enough) then supplies the house on demand.

Tank sizing depends on your household’s daily consumption and the borehole’s yield. South Africans use on average around 237 litres per person per day, which gives you a rough starting figure for sizing. A family of four would need the system to reliably deliver around 950 litres daily, before any buffer margin.

As a Johannesburg reference point, backup tank-and-pump systems typically cost R20,000–R40,000, with whole-house examples running around R55,000. Your specific site — ground conditions, tank position, distance to the house — will shift that figure.

Stage 7 — Connecting to Your Home

The final plumbing stage integrates the borehole supply with your household pipework. This can mean feeding borehole water into a separate non-potable circuit (for garden, toilets and laundry), or — if water quality tests pass — into the full household supply, potentially alongside or instead of municipal water.

A proper integration includes a check valve or backflow preventer to stop borehole water from entering the municipal main (which Joburg Water prohibits), a pressure-reducing valve if needed, and any treatment equipment identified at the water-quality stage. For a detailed look at what this plumbing integration involves, connecting a borehole to your house covers the main options and common mistakes.

If you are ready to get actual numbers for your property, it costs nothing to see what local installers quote. Get 3 borehole quotes free — no obligation, no hard sell.

What a Complete Quote Should Include

When comparing contractors, a turnkey quote for a complete borehole installation should itemise at minimum:

Item	Why it matters
Drilling (per metre rate + rig mobilisation)	Depth is uncertain until you drill; you need to know how the rate is calculated
Casing type, diameter and length	Affects longevity and collapse risk
Yield test and written report	Required for correct pump selection
Water-quality laboratory analysis	Required before any drinking-water use
Pump model, specs and installation	Must match borehole yield
Control panel with protection relays	Non-negotiable for motor life
Electrical cabling and CoC	Legal requirement
Storage tank, secondary pump and pipework	Defines day-to-day usability
Connection to house and any treatment	Completes the system

Quotes that lump everything into a single line with no breakdown make comparison almost impossible. Ask for a line-item quote and, if a contractor declines, that tells you something useful.

As a Johannesburg reference point, typical complete borehole systems run R40,000–R150,000, with most residential installations falling between R60,000 and R100,000. Prices in other regions can differ — use the Johannesburg figures as orientation, not as a local benchmark, and get at least two or three quotes before committing.