A borehole pump buying guide for Johannesburg homeowners
A pump is the most expensive single part of most borehole systems. Buying the right one is about the hole and your use, not the brand on the box.
Start with the hole, not the pump
The right pump is defined by the borehole it sits in: how much water the hole can give, how far down the water sits, and how high the water has to be lifted to reach the tank or the house. A pump that moves a lot of water at a low lift may be exactly wrong for a deep hole with a long lift, even if its flow figure looks impressive. And a pump that pulls harder than the hole can refill will end up running dry and failing early.
So the discipline is: test the hole, note the depth to water and the lift, then size the pump to those facts. A pump chosen before the hole is understood is a guess.
Then match it to how you use water
Your duty matters as much as the hole. A garden and a tank topped up occasionally is a gentle, intermittent duty; a household drawing borehole water through the day, or a business running irrigation on timers, demands more. The storage you install also changes the pump: more storage lets a steady pump run across the day rather than chasing demand, which is easier on the pump and the hole alike.
Tell the contractor all of that up front. A pump sized to the real duty lasts longer and gives better pressure than one sized to a rough guess.
Protection is part of the purchase
The cheapest way to destroy a new pump is to let it run dry. Level controls that stop the pump when the hole is low, a non-return arrangement so water does not drain back and spin it backwards, and a control box matched to the motor are all part of a proper installation rather than optional extras. A pump fitted without them may work for a while and then fail well before its time.
Ask what protection is included in the quote. If the answer is vague, push on it - it is one of the clearest signals of whether an installer knows the job.
Quality, spares and service
Pump quality matters, because access to it is expensive: the pump and its pipe come out of the hole for any serious repair. Brands that are common in South Africa and well supported by spares are usually a safer choice than an unknown unit, because a minor fault that needs a rare part can mean a long wait without water. Ask the contractor which pumps they fit and why, and whether they can service and repair what they install.
One practical check is to ask what happens when the pump fails. A contractor who carries common spares, or can get them quickly, will keep you in water far better than one who has to order from overseas. The pump you cannot get parts for is the expensive pump in the long run, whatever it cost up front.
A second check is the warranty and who honours it. Ask what the pump is guaranteed for, who repairs or replaces it if it fails early, and whether the installer handles that or sends you to a supplier. A warranty you have to chase yourself, for a unit two metres underground, is worth less than it sounds.
None of this replaces the two facts above: the hole decides the pump, and your use decides the duty. Get those right and the brand question becomes a smaller part of the decision.
Frequently asked questions
Is a bigger pump better?
No. Too large a pump can pull a hole down faster than it refills and run dry. Match the pump to the hole's yield and the lift.
What protects a pump from running dry?
Level controls and a suitable control box are the usual protection. They should be included in a proper installation.