How many quotes should I get for a water installation project?

Three is the practical minimum for most projects. Fewer and you have no real basis for comparison; more and the process becomes difficult to manage without the quotes going stale. The key is not the number but that all quotes are built on the same brief — our guide on getting multiple quotes covers the process in more detail.

What if installers keep recommending different solutions rather than quoting the same thing?

That is worth taking seriously rather than dismissing. Ask each installer to explain their reasoning and, separately, to also quote the solution you originally specified. This gives you both a like-for-like comparison and insight into whether a different approach might genuinely suit your situation better.

Should I tell installers what budget I have?

There are reasonable arguments on both sides. Sharing a budget can help installers tailor their recommendations rather than over-specifying. The risk is that some installers will simply price to your ceiling. A safer approach is to ask for a mid-range quote first, then ask separately what a premium option would add and what a stripped-back option would remove.

Is the cheapest quote usually the worst option?

Not always, but it warrants scrutiny. A lower price often reflects a narrower scope, cheaper components, or thinner margins on labour — any of which may or may not be acceptable depending on your priorities. Use the itemised breakdown to understand *why* a quote is cheaper before deciding whether that difference is a problem.

What should a water-quality test result tell me after installation?

For any system supplying drinking water, the test results should be benchmarked against SANS 241 (2024 edition), South Africa's drinking-water quality standard. A responsible installer will provide documented results, not just verbal reassurance. If filtration or treatment is part of the system, ask when and how often retesting is recommended.

How to Get Comparable Quotes from Water Installers

Getting three quotes is sound advice. Getting three comparable quotes is the part most homeowners skip — and it’s where projects go wrong. If each installer interprets the job differently, the lowest price on paper may simply reflect the thinnest scope, not the best value. This guide walks you through exactly what to put in front of every installer so their numbers land on the same baseline.

Why quotes drift apart in the first place

Water installers quote what they assume you need. If you ring them and say “I want a borehole,” one will price a basic pump-only setup while another will include a UV filter, pressure vessel, and automatic changeover switch — because that is what they would install for their own family. Neither is wrong; they just filled in the blanks differently.

The same problem affects tank-and-pump backup systems, rainwater harvesting, and filtration projects. Scope assumptions are the single biggest source of quote variation, and they are entirely within your control to remove.

Start with a written project brief

Before you contact anyone, write down the following in plain language — even a short email or a notes-app bullet list works:

Water source: municipal supply, borehole, or both?
Primary purpose: drinking water, garden irrigation, toilets and laundry only, whole-house?
Site specifics: property size, approximate distance from proposed installation point to the main distribution point, whether you have an existing storage tank or pressure pump
Power situation: do you have solar/inverter backup, or will the pump need to run off grid during load-shedding?
Any known constraints: limited roof space, a body corporate, restrictive covenants, or a neighbour’s borehole already nearby

Hand this brief to every installer verbatim. It takes twenty minutes to write and saves hours of back-and-forth — and prevents the awkward situation where you have accepted a quote only to discover a major component was never included.

Specify the equipment tier you want priced

Installers work across a wide quality spectrum. Ask each one to quote at the same tier: entry-level, mid-range, or premium. If you are open to recommendations, ask for a mid-range option and note that you are happy to see an upgrade option as a separate line item — not bundled in.

For context on what mid-range looks like financially: typical complete borehole systems in Johannesburg run R40,000–R150,000 installed, with most falling in the R60,000–R100,000 band. Borehole pumps alone typically cost R15,000–R35,000 installed. Backup tank-and-pump systems typically run R20,000–R40,000, with whole-house setups around R55,000. Use these figures as a sanity check, not as firm targets — confirm actual pricing through quotes.

The line items to insist on seeing separately

A lump-sum quote tells you almost nothing. Ask every installer to break their price into:

Line item	Why it matters
Equipment supply (make and model)	Lets you verify specs and compare brands directly
Labour and installation	Reveals whether low prices mean rushed work
Civil works (trenching, concrete, casing)	Often omitted from headline borehole quotes
Filtration and water-quality treatment	Critical if you intend to drink the water — SANS 241 (2024 edition) sets the standard
Electrical connection and controls	Frequently a hidden add-on
Commissioning and water test	Should always be included; flag it if it is not
Warranty terms per component	Pumps, tanks, and membranes often carry different warranties

If an installer refuses to itemise, treat that as information about how they run their business.

Ready to put your brief in front of qualified installers? Compare 3 free quotes — vetted installers, no obligation.

Ask the same four questions on every call

Beyond the written brief, a short verbal checklist keeps conversations consistent:

What is included in your commissioning process, and will you provide a written water-quality test result?
Who carries liability if civil works disturb existing pipes or cables?
What is the payment schedule, and do you require a deposit before ordering equipment?
How do you handle post-installation call-outs in the first 12 months?

Record the answers. Variations here are often as revealing as price differences.

Account for Johannesburg-specific factors

Johannesburg’s municipal supply context matters when you are sizing a backup or alternative system. Johannesburg Water’s audited 2024/25 figures show non-revenue water at 44.8% — a figure that reflects the pressure the network is under and is a reasonable prompt to think carefully about storage capacity rather than just source. The city’s reservoir system holds roughly 27 hours of citywide storage buffer, which means a prolonged pump-station failure has limited slack. Factor this into how large a tank or how deep a borehole you actually need, and ask each installer how their proposed system performs under a 48-hour municipal outage.

Ask installers whether their sizing assumptions account for your household’s actual consumption. South Africans use roughly 237 litres per person per day on average, above the global average — but actual household figures vary considerably depending on garden size and usage habits. Give installers your best estimate rather than leaving them to guess.

Learning how the comparison process works before you contact installers will also help you spot gaps in what each quote covers.

Vet the installers, not just the prices

Comparable quotes are only useful if the installers behind them are reliable. Check registration with the relevant industry bodies, ask for references on similar projects, and read recent reviews. Our guide on checking installer reviews and references covers what to look for and what red flags to watch for. And if you are not sure whether you are speaking to enough installers, getting multiple quotes explains why three is the practical minimum and how to manage the process without it taking over your week.

Once your brief is ready, the fastest way to reach vetted local installers is to use a structured comparison. Get your 3 free quotes — same scope, same installers, no obligation.

Comparing what comes back

When quotes arrive, resist the instinct to sort by total price first. Instead:

Check that every installer has quoted to your brief. If one has changed scope without explanation, ask why before you draw any conclusions.
Verify that the equipment models named are the same or genuinely equivalent — a cheaper pump may have a shorter warranty or a lower duty cycle.
Look at payment terms: a large upfront deposit on equipment that is not yet ordered is a risk worth noting.
Consider what post-installation support looks like. A system that fails six months in and takes three weeks to get a call-back on is not a bargain at any price.

The extra hour you spend at this stage is almost always recovered in avoided headaches — and often in avoided costs when something needs attention down the line.