Borehole Water: Pros, Cons and Plumbing Considerations

A borehole is one of the few upgrades that genuinely takes an Alberton or East Rand home off municipal water dependency rather than just buffering against outages — but it comes with more upfront uncertainty and ongoing plumbing considerations than most homeowners expect going in. Here’s what actually matters before you commit to drilling one.

What a borehole gives you — and what it doesn’t

A borehole taps groundwater, which means supply is independent of municipal interruptions and, once running costs are covered, effectively free water for irrigation, pool top-ups and general household use. What it doesn’t give you automatically is drinking-quality water — groundwater varies hugely in mineral content, clarity and safety from one property to the next, even between neighbours, so “we have a borehole” and “we drink borehole water” are two separate decisions with different plumbing requirements behind each.

The part nobody can promise you upfront

Yield is the honest uncertainty in any borehole project — a hydrogeological survey can indicate likely water-bearing zones, but the actual litres-per-hour a borehole produces isn’t confirmed until it’s drilled and test-pumped. A reputable driller will be upfront about this rather than guaranteeing a yield before the hole exists. Budget for the drilling and test-pumping as the first phase, then make the pump, plumbing and treatment decisions once you actually know what you’re working with.

Water quality and testing

Before any borehole water goes near a tap used for drinking, cooking or bathing, it needs to be lab-tested — common issues in this region include high iron content (staining on fittings, basins and washing), hardness (scale buildup, similar to what we see with municipal water in older parts of Alberton, just often worse), and occasionally bacterial contamination depending on the site and depth. Testing against SANS 241 drinking water standards tells you exactly what treatment the water actually needs rather than guessing and over- or under-treating.

Connecting into the household plumbing

Same principle as any alternative water source: you can run borehole water to a handful of outdoor taps only (irrigation, hosing down driveways, filling a pool) with no connection to the house’s drinking-water plumbing at all, or you can plumb it fully into the household system with treatment and a changeover or blending valve. The second option needs backflow prevention exactly like a JoJo tank connection does — borehole water must never be able to siphon back into the municipal line, and if you’re blending borehole and municipal supply for pressure or volume reasons, that connection needs to be done correctly the first time.

Ongoing treatment and maintenance

• Iron and manganese removal filters need periodic backwashing or media replacement — this isn’t a once-off install
• Water softeners (if hardness is an issue) use salt and need regular topping up
• The submersible pump itself has a service life and will eventually need replacement — budget for this as a running cost, not a one-time expense
• Re-test water quality periodically, not just at installation — groundwater composition can shift over time, especially after heavy rain or nearby construction

What a proper borehole plumbing quote should include

Beyond the drilling contractor’s scope (hole, casing, test-pump report), the plumbing side should cover: the submersible pump and its electrical connection, pressure vessel or tank if needed, the treatment train appropriate to your actual water test results, backflow prevention wherever it joins municipal-fed plumbing, and clarity on which taps in the house are fed by which source. A quote that only covers “connect the borehole to the house” without specifying treatment and backflow protection is leaving the part that actually makes the water safe to use for a second, separate conversation.