Swimming pool leaks

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A crack has appeared in my swimming pool! What should I do?

Ten tips detecting and finding a water leak – Check the swimming pools floor and cracked walls Mosaics Tiles and render – Inspect liner for holes tears Cracked skimmer steps lights – fault find the pump heater valves and Test the Pipes.

  1. To find leaks, make sure the water is crystal clear. Begin by looking for holes or tears in the liner. If it’s a concrete pool then see if any tiles thatLiner swimming pool have blown off. See if can spot any cracks in the walls or floor? Check for cracks in the rendering can be where It is leaking from and further detecting and investigation using a detecting dye leak test might be needed to find out if one of the crack is responsible for the loss!
  2. Inspect carefully the floor of the walk-in fibreglass steps, detect for slight cracks in the steps, on the treads, the rises and check over the sides of the steps too and all over the steps gasket faceplate.
  3. A crack in a skimmer leaking due to frost and ice expanded and has cracked the skimmer or finding it might be suffering from old age and deterioration the skiimer pipes perhaps have de-jointed or fractued under the skimmer. Sometimes the liner tears away from the skimmer and fittings.
  4. Leaking outlets (Returns and drains) and underwater lights. Underwater lights and drain are obviously more difficult to get at too to determine if there is a leak on the fittings and pipes.
  5. Some reasons why concrete swimming pools crack and is either the shell material hascracked_pool__shell deteriorated and breaks down, or possible poor workmanship, using the wrong type underweater lights Or in some long concrete pools there are no or not enough expansion joints in the floor or walls Inferior sealing around the inlets, skimmers, and main drains. Check the hand rails for leaks with dye as well.
  6. On liners the gaskets and back plates sometimes deteriorate hairline cracks can appear in the lights niche The conduit at the back that carry the cable for the lights can leak, finding  the leaks in main drain, skimmer, or returns.
  7. A feed back sound test for tears and holes can be performed on liner type only.
  8. Inspect around the filter, pump, valves, multi-ports, and filter lid has no crack or holes. Where possible inspect the pipes and connections.
  9. Look at the heat exchanger, and heater. They can corroded and leak. Deecting other clues, check underneath for the fittings for wetness, look for puddles of water.
  10. If we are fortunate to have weeks of hot weather or you have one indoorsl, use the bucket test to check if it could be evaporation..

Detecting leaks

However the major concerns are that finding out you’re loosing water potentially undermines the foundation and possibly any nearby buildings.
Early leak detection and intervention are very important to prevent this process from continuing.
Repairing the defect as soon as possible should relieve further potential problems along the way.

The other concerns are the cost of losing so, chemicals, and the waste of heat.

If you suspect your pool is leaking, there are a number of things you would do to eliminate some of some suspect’s areas in the pool and circulation system.

Leaking concrete pools, cracks and poor workmanship

These are notorious for leaking. Shotcrete and Gunite are well-known for losing H2O. Constructed the wrong way the structure will eventually breakdown to become nothing more than a giant soggy paper cup, primarily because the liquid has seeped through the finished lining be it tile or render and has aggravated the matrix, breaking the bonds that hold the it together.

Unlike the liner method, Concrete swimming pools are built with reinforced cavity with 2 x 100mm concrete block walls and flooring, several coats of waterproof render covering the shell, followed by tile-bands and marble type render finish, or covered completely with mosaics or tiles which are fixed on with waterproof adhesive and grouted. The outlets and inlets are installed during the construction process and there you have the finished product.

When a pool begins to lose water, it’s usually in more than one place that it has cracked and there may be other underlying problem with the construction itself.

Patching and re-rendering where the leaks are does not always work, and you may be throwing good money away. The only answer apart from fibre glassing is to line the shell with a heavy duty 1.5mm thick vinyl liner with a felt underlay. This type of is known as on-site lining, and usually carries a ten year guarantee and they work very well.

John Cox TnISPE(Cert)

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