Liner Pool Leaks And Repairs – Possible Causes

There are several check lists below to assist you in finding the possible reasons why your swimming pool is leaking

If the liner installed has been bedded in for a long time and has had numerous repairs and patches, it maybe false economy to continue repairing the liner, so consider whether it’s better to replace it altogether?

leaking swimming pool
New liner installed in Stroud Gloucestershire and the is Pool filling

The bonus for replacing your vinyl liner is your pool should almost look brand new again. If you decide it’s worth changing your liner before installing the liner pressure clean the surrounds and the pools coping stones or if they are worn have them replaced

First of all  an example of why it maybe time to change the pool liner

leaking liner pool
The leaking liner looks old, the colour has gone. Chepstow

This example (to the right) in this pool liner image  is that it looks old and has lost its vibrant colouring. It had pin hole leaks as well as some tears in the liner.

Some of the coping stones were loose and dangerous, all the coping stones were taken up and relayed, before relaying we removed the old liner lock and fixed new track then the pool liner was replaced

The vinyl liner

Liner pool leaking
Draining the water from a pool ready the measure up for a replacement liner In Chepstow.

What are the possible causes for water to  leak out of a liner pool?

  1. Old age, general wear and tear, pinholes.
  2. Accidental damage.
  3. Sharp objects that have fallen  into the pool.
  4. Vandalism.
  5. Youngsters pole vaulting.
  6. A large animal strayed and fell in.

Answer more often than not is: Replace the pool liner or renovate the pool

It may not be the liner that is leaking but it could be the pool fittings

  1. Check the skimmer for cracks.
  2. Pool return gaskets have deteriorated.
  3. Main drain gasket has failed.
  4. Underwater light is leaking through a cracked niche or hockey stick (cable conduit).
    Cracks in niche letting water escape and gasket failure
    There were cracks in this niche (behind the light) letting water escape and possible gasket and face-plate failure. Near Bristol.

    Replacement underwater pool niche and light
    Replacement underwater niche and light with new conduit connected to the junction deck box. Near Bristol.

The circulation system (Pipework, valves).

Pool plumbing
Swimming pools pipework and filter checked for leaks. Gloucester

The possible causes of leaking pipework are:

  1. Poor workmanship, that is the pools pipework is not jointed or connected correctly in places.
  2. Frost damage leading to cracked pipes and valves.
  3. Ground movement leads to underground pipework splitting or disjointing.
  4. Accidental damage to pipes, caused by excavating.

Replace all the old pipework and valves. 

The reason for replacing all the pipework is simple. When you’ve  excavated one section down to the pipework that’s leaking and repaired it. there’s always the potential for another leak to appear in the pipework. later in time. which will cost more in the long run and is a false economy, so sometimes it’s better to replace the lot then you know that the pipework laid is not leaking. (assuming the pipework is done correctly.

The filter, heating and the pool pump

The possible causes of leaking.

  1. Filter connections and gaskets damaged or degraded.

    Pool filter leaking
    Water accumulating around the bottom of a pool filter Bristol
  2. Multi-port spider gasket, O’ring has degraded or damaged.
  3. Drain valve broken.
  4. Filter unit has cracked.
  5. Pump leaking through joints, broken gaskets, ceramic seal on the impeller

Renew the gaskets and o’rings, replacement pump and multi-port . It’s  rare does the filter need changing

Repairs or replacement? 
New pool liner
Replacement pool liner is installed and the swimming pool is filling. Once filled, the pool will look like new again. Chepstow

Depending on the nature of the  leak in a liner pool, sometimes these can be repaired underwater.
However the liner maybe to old and brittle to repair and in the end there is no alternative but to install a replacement liner.

There is a range of liner colours and patterns to chose from.If the swimming pool is looked after, winterised & summerised correctly, has a good pool maintenance record, regular checks on correct pH, total alkalinity, chemical balance then serious leaks and repairs should be a  rare occurrence. A pool liner could last around 8 to 10 years or even longer in some cases. 

Liner Swimming Pools.

For more information on liner pools contact John Cox TnISPE (Cert).

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I cover most area including London Bristol Cardiff Hereford Worcester Gloucester Monnmouth Chepstow Oxford Swansea  Cowbridge Bridgend Ross-on-Wye Newport Abergavenny Somerset Bath Salisbury.

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