Swimming Pool Leak Detection and repair services – some Free advice to help get you started!!


Some questions that you should be asked by someone who has experience with pool leak detection are as below – If you don’t get asked some of these then “Move ON”. If you decide to contact us try to have the answers to some of the questions below at hand as this will help us, and speed up the leak detection process – Leak location/detection can be easy or it can be like looking for a needle in a hay stack … we have a tried and tested procedure that we follow.

With your pool pump running / working check that the pool filter backwash / waste line plumbing pvc pipework is not leaking to waste ( assuming that you have a conventional pool filter fitted ) Your filter top ( MPV = multiport valve ) maybe leaking internally when it is in the Filter position and dumping pool water out of the backwash / waste plumbing without you being aware. – usually when the pump is working. Check the drain where this backwash/waste pipe ends up if possible – it should be obvious, follow the pipe out of the box/room etc. This may only be a small drip but this adds up after a few hours / days. This only gets worse, get it sorted ASAP. A very common problem usually found on older systems. An easy check and usually our starting point in the process.


1. Is your pool leaking or is it Daily evaporation? if unsure, try the The Bucket Test ( refer to the short video below ) first. With the pool pump turned off and no rainfall or heavy winds in the forecast you need dry, calm/stable weather for any kind of accuracy here. Watch the short video below a few times. Have you let the water level drop until it stops falling? does the water level drop below the entrance to the skimmer box, or does it stabilise at the entrance to this box/s? ie no pool water can enter the skimmer box and the level is now stable?

2. Is your pump or any other piece of equipment or plumbing in your pump room / box leaking / dripping? is there any water evident on the floor etc? Detective work and diligence is required here. You could miss something very obvious.

3. Do you have any “air bubbles” returning to the pool through the return jets located on the pool shell with the pump running. if you have air being drawn into the system it should be very obvious ( a stream of air bubbles coming out of the return/s ). Unplug your suction pool cleaner and remove your vacuum plate from the skimmer box ( if you have 1 installed ) and then check again. Obviously ensure that the pool water level is correct at this time and your pool side and pump baskets are clean. There should be no air bubbles returning to the pool via the return jets, if you have done the above then you have an air tight system.

4. Does the pool lose water when the pump is running only? or does it lose water when the pump is OFF or ON? ( either or? ) or both conditions?.

5. Make a mark on the pool shell/skimmer box face plate and try to establish how much water the pool is losing over a 24 hour period. Measure this daily loss around the same time and record in mm. This gives a little indicator of what size leak we are looking for. This will obviously not work if rain is forecast when you are carrying out this test. The rainy season can be problematic, you need to pick your days. Pick a dry time/spell with stable weather conditions i.e not too much wind over the pool surface either..

6. You should be asked if your pool shell is … concrete / fibreglass / plastic liner or a.n. other and the approximate age of this pool.

If you have the above info at hand go to our Contact us page, enter this info into the form and send to us, it will save us all some time and save you some $$


Proper Pressure testing procedures must be followed to avoid injury or damages

When pressure testing swimming pool plumbing for leaks we Always use water only to start with. Once you are sure that the PVC line under pressure is Leaking and not holding pressure we then remove the water supply and inject air into that line. The water under pressure that has escaped through the crack/s usually “pools” around the crack/s and when you inject air into the same pipe the air will get out at the same spot/s and you should/may hear a bubbling sound below the ground where the leak/s are eg. like using a straw and blowing air into a glass of water. It is very seldom that we need to take the injected pressure above 12PSI to establish a leak/s. Monitor the pressure gauge and do not stand in front of or above any pressure plugs or bungs that have been inserted. You could get hurt if they blow out. You need to stay ALERT and pay attention to ensure the Safety of everyone involved.

Take a look at this link for an interesting article and more information on Pool Leak detection.

Also take a look at this useful video that demonstrates good pool leak detection practises ….

Is your swimming pool leaking? or is it daily evaporation?

Carry out a Simple Test called ” The Bucket Test” – view the short video below

Is your Pool leaking? or is it daily evaporation?

Pool leak detection pressure rig, air water and air

Pressure Testing swimming pool plumbing – the suction line was leaking on this pool

Leak detection Pool pressure test rig

Injecting Air into a leaking pool return line – following pressure testing with water.

leak located

Plant root damage caused the break in this pool plumbing line

Leak detection equipment

The Latest pool leak detection equipment

Pool plumbing leaking – located, exposed and cut out the faulty section – install new section/s and test.

Scroll to Top