Common Pool Repairs in Centurion and Pretoria
Most pool repairs in Centurion and Pretoria are not dramatic. A weir lid snaps, a union starts dripping, the backwash line never quite stops running, or a patch of marbelite sounds hollow when you tap it. Left alone, each of these small faults costs water, chemicals or pump hours, and some grow into bigger jobs. This guide goes through the repairs Highveld pools need most often: what you will notice, what usually causes it, what you can safely check yourself, and when it is time for a technician.
Why Highveld pools need the repairs they do
Gauteng is hard on pools in a few particular ways. The water is hard, so scale builds up on anything that heats or carries a current. Winters are long and dry, so plaster and grout dry out and shrink while the pool sits unused. Summers bring heavy storms and strong sun, which age plastic fittings quickly. And much of Centurion and Pretoria sits on clay soil that swells when it is wet and shrinks when it dries, so the ground around a pool moves a little every season. Most of the faults below trace back to one of those four things.
Cracked or leaking weirs
What you notice: the pool level drops and stops at about the bottom of the weir mouth, or you see a crack where the weir meets the pool wall or the paving.
Usual cause: the weir is a separate plastic box set into the ground, and it moves differently from the concrete shell. Clay soil movement, tree roots and paving that has settled all put strain on that joint, and old weirs go brittle in the sun.
What you can check: look closely at the inside of the weir and the joint with the shell, using a torch. A level that always stops at the same height is a strong clue. Our pool leak detection guide explains the bucket test, which tells you whether you have a leak at all before you start looking.
When to call: a small crack can sometimes be sealed, but a weir that has split or pulled away from the shell usually needs replacing. Weir replacement is quoted after inspection, because it depends on the weir, the paving around it and the plumbing behind it.
Broken weir lids and baskets
What you notice: a lid that cracks underfoot, or a basket with a split side or missing handle.
Usual cause: sun, age and people standing on the lid. A broken basket lets leaves through to the pump basket, and a broken lid is a trip hazard.
What you can check: measure the lid and basket and note the make of weir if it is moulded into the plastic. These are parts, not repairs. Send us a photo and the measurements and we will tell you what fits.
Pump seals and leaking unions
What you notice: water dripping under the pump, a wet patch on the pump room floor, rust marks on the motor, or air bubbles in the pump basket.
Usual cause: the mechanical seal between the pump and the motor wears out, especially if the pump has ever run dry. The threaded unions and joints either side of the pump perish in the sun or are over-tightened.
What you can check: with the pump off, hand-tighten the unions and check that the O-rings are seated and lightly lubricated. Make sure the pump lid O-ring is clean. Do not keep running a pump that is dripping from between the wet end and the motor; water reaching the motor bearings turns a seal into a motor.
When to call: a leaking seal needs the pump opened up. A pump repair or service is R850, with parts quoted before they are fitted. Our older post on pool pump problems and when to replace covers the other warning signs.
Multiport valve problems: water out of the backwash line
What you notice: water trickling from the backwash or waste pipe while the valve is on filter, a handle that is stiff or wobbly, or a pool level that keeps dropping for no obvious reason.
Usual cause: the rubber spider gasket inside the valve head wears and stops sealing between the positions. Moving the handle while the pump is running speeds this up.
What you can check: always switch the pump off before you move the handle, and make sure it clicks firmly into each position. If water still runs out of the backwash line on filter, the gasket is almost certainly the problem.
When to call: replacing the gasket or the valve head is a routine repair, and it stops a steady loss of treated water.
Broken filter laterals: sand in the pool
What you notice: fine sand settling on the floor in front of the return jets, often after backwashing.
Usual cause: the laterals are the slotted fingers at the bottom of a sand filter that hold the sand back. Age, too much pressure or a hard knock when the sand was last changed can crack one, and sand then goes straight back to the pool.
What you can check: confirm it is filter sand and not soil blown in from the garden. Filter sand is fine, even and settles in front of the returns. Also make sure the valve was not left between positions.
When to call: fixing laterals means emptying the filter, so it is usually done with a sand change. Our pool repairs service covers filters, valves and fittings, and we quote the laterals in writing before opening the filter.
Pool light faults
What you notice: the light does not come on, flickers, trips the earth leakage, or has water inside the lens.
Usual cause: a blown halogen bulb, a failed transformer, or a perished seal that has let water into the light.
What you can check: check the transformer is switched on and the trip switch has not dropped. That is as far as it goes. Do not open an underwater light or touch its wiring yourself.
When to call: if the light still does not work, or the earth leakage trips, switch the light circuit off and have it looked at. Our pool light package, the transformer and an LED light, is R1,799, with fitting quoted separately once we see the niche and the cable.
Salt chlorinator cells
What you notice: the pool goes cloudy or green while the chlorinator control box shows it is running, or the box shows a low-salt or check-cell warning.
Usual cause: calcium scale on the cell plates, low salt, or a cell that has reached the end of its life.
What you can check: with the power off, look at the cell plates for white crust, and test the salt level.
When to call: a chlorinator service is R1,299 and covers cleaning the cell and inspecting the unit.
Cracked or hollow plaster and marbelite
What you notice: hairline cracks, flaking patches, rough spots on the steps, or a dull, hollow sound when you tap an area of the wall.
Usual cause: marbelite that has been left low or empty over a dry Highveld winter shrinks and can lose its bond with the shell underneath. Poor water balance etches the surface over time, and clay soil movement can crack the shell itself.
What you can check: tap suspect areas gently with the handle of a screwdriver and listen for a change in tone. Note whether cracks are growing by marking their ends with a waterproof pen.
When to call: small hollow patches can often be cut out and repaired. Large hollow areas, or cracks that keep coming back, need an inspection to tell a surface fault from a structural one.
Clay-soil movement on the Highveld
What you notice: new cracks in the coping or paving around the pool, coping stones lifting, gaps opening along the edge of the paving, or a weir and pipes that start leaking all at once.
Usual cause: clay that swells after the first big summer rains and shrinks again in winter. Leaking water makes it worse, because wet clay moves more.
What you can check: watch for patches of lawn or paving near the pool that stay wet when the rest is dry. That points to water going somewhere it should not. If you suspect a leak, our leak detection service is R1,200 and finds the source before anything is opened up.
Tile line damage
What you notice: waterline tiles that are loose, cracked, missing or sound hollow, and grout that has washed out.
Usual cause: freezing nights, the ground moving, and the constant wet-dry cycle at the waterline. Scale build-up can hide a loose tile until it falls off.
What you can check: press gently along the tile line. Keep any tile that comes off, because matching an old tile can be difficult.
When to call: loose tiles should be re-fixed before water gets behind the rest of the row.
How Crystal Reef quotes repairs
We inspect first, find the actual cause, and quote the repair in writing before any work is done. Parts are priced at the time of quoting. A call-out to inspect or diagnose is R650. Deducted from your quote when you accept it.
To get started, WhatsApp 081 577 5051 with photos or a short video of the problem and tell us which suburb you are in. That helps us bring the right parts to the first visit.