Skip to content
Gren Pools

Pool servicing and repairs in Cape Town

Pool equipment fails gradually and then suddenly. A pump that has been running a little louder for a month, a filter that needs backwashing more often than it used to, a salt chlorinator quietly producing less than it claims — each is a small thing that becomes an expensive thing if left. Servicing covers pump and filter repair, chlorinator work, solar and heat pump installation, and scheduled care for owners who would rather not think about it.

Pumps and filters

The pump is the one component that runs almost every day of a pool's life, so it is where wear shows first. A rising noise, a motor running hotter than it should, a shaft seal weeping, or a basket that will not hold prime are all signs of something identifiable rather than a general decline. Most of them are a repair rather than a replacement, and knowing which is which before you buy a new pump is worth the call-out.

Filters need less attention but fail more quietly. Sand consolidates and channels over years, so the water passes through without being properly filtered and the pool never quite clears no matter how much chemical goes in. Cartridge elements lose their pleat structure. Neither announces itself, and both get blamed on the chemistry instead.

Pump sizing is worth checking at the same time, particularly on an older pool that has been renovated or extended. An oversized pump is not a safety margin, it is an electricity bill and a filter being pushed harder than it was designed for.

Chlorinators and water balance

A salt chlorinator makes chlorine from salt already dissolved in the water rather than removing the need for it. Cells scale up over time, particularly where the water balance has been allowed to drift, and a scaled cell produces less while the control panel carries on reporting that it is working. That gap between what the box says and what the water is doing is the most common cause of a pool that has gone cloudy for no apparent reason.

Balance matters as much as sanitiser. pH out of range makes the chlorine in the water progressively less effective at doing anything, which is why a pool can hold a reading and still go green. It also determines whether the water is gently attacking the plaster or gently depositing scale on it, and both of those are slow, expensive and entirely avoidable.

Solar and heat pumps

Cape Town gets enough sun to make solar pool heating genuinely worthwhile, and it is the cheapest heat available once installed because it has no running cost beyond the circulation. The constraint is roof: it needs a reasonable area at a usable orientation, and how much water it will lift the temperature of depends directly on how much collector area you can fit.

A heat pump is the controllable alternative. It draws heat from the air rather than generating it, works independently of the weather, and will hold a set temperature — which is what you want if the pool has to be usable on a particular date rather than whenever the sun has been out. It costs more to run than solar and less than resistive heating.

The two are frequently paired: solar doing the bulk of the work for free through the warm months, with the heat pump covering the shoulder season and the days solar cannot.

Scheduled servicing

Scheduled servicing is regular attendance rather than emergency call-outs — testing and balancing the water, cleaning baskets and filters, checking the plant and catching the small failures while they are still small. It suits holiday and rental properties, which are unoccupied for exactly the weeks a pool is least forgiving, and owners who would simply rather it was handled.

It also produces a record. Knowing when the filter was last serviced and what the water has been doing over months is what turns a diagnosis into something quick rather than a process of elimination.

Questions about this work.

How often should a pool pump run?

Long enough to turn the whole volume of the pool over at least once a day, which for most domestic pools is somewhere between six and eight hours and longer in high summer. The right number depends on the volume, the pump and the filter, so it is set for the specific pool. Running it around the clock is not better — it costs a great deal in electricity and buys very little in water quality.

Why is my pool green even though I have added chlorine?

Most often because the pH has drifted out of range, which makes chlorine in the water progressively less able to do anything, so the reading looks acceptable while the pool carries on going green. The other common causes are a scaled salt chlorinator cell producing less than the panel reports, and a filter that has stopped filtering properly — channelled sand or collapsed cartridge pleats. All three are diagnosable rather than guessed at.

Is solar or a heat pump better for a Cape Town pool?

Solar is cheaper to run and free once installed, but it depends on the weather and on having enough usable roof area at a workable orientation. A heat pump costs more to run but holds a set temperature regardless of conditions, which matters if the pool needs to be usable on a specific date. Many installations use both, with solar carrying the summer and the heat pump covering the shoulder months.

Can you service a pool you did not build?

Yes. Servicing and repair work is not limited to pools we installed. Older pools from other builders often benefit most, because they are the ones most likely to have plant that has drifted out of specification over the years without anyone looking at it as a whole.

Tell us about your garden.

Send through a photo and rough dimensions and we will come out, walk the site and quote you a fixed price.