Common Pool Pump Leaks

Common Pool Pump Leaks

Pool Pump LeaksAlthough some people choose to use their pools year-round, most outdoor pools in Vancouver are ‘winterized’ for the fall and winter months. But when spring arrives, many people are eager to get their pool ready for the summer time.

While swimming pools are composed of several systems (electrical, structural), the plumbing portion is by far the most extensive component. The average residential pool is made up of numerous drains, valves, seals, couplings, fittings and a fair amount of PVC, galvanized and/or copper pipe. As with anything, parts age and this can lead to leaks and other problems.

Common pool pump leaks that occur at the pump piping connections and motor connection include:

  1. Leak on the Suction Side
  2. Leak on the Discharge Side
  3. Leak from the Shaft Seal


Leak on the Suction Side

The suction side is under a vacuum. If the leak is occurring on the suction side or where the water enters into the pool pump, then it is an air leak. Air is being drawn into the closed system when the pump is operating.

Indication of a Leak on the Suction Side

  • Pump is struggling to move water at start up
  • Power is on but nothing happens
  • Filter tank pressure is lower
  • Pipe feels loose


Leak on the Discharge Side

In contrast, the discharge side is under pressure. If the leak is occurring on the discharge side or where the water is pushed back out, then it is a water leak. This type of leak usually starts as a drip and grows from there.

Indication of a Leak on the Discharge Side

  • Water drips/sprays at the pipe connection to the pump
  • Puddle of water on the floor under the pump
  • Unusual water loss in your pool


Leak from the Shaft Seal

If water is leaking from the attachment between the electric motor and the pump, then it is usually a problem with the shaft seal. The shaft turns the impeller and isolates the wet components of the pump from the dry, electric motor. This seal is meant to prevent water from escaping from the system.

Indication of a Leak from the Shaft Seal

  • Unusual noise coming from the motor
  • Puddle of water on the floor under the pump motor connection point


If any of these leaks go undetected or ignored, they can lead to worse problems for you. If a drip grows, spray out can occur and may begin to empty out the pool water. This can damage surrounding equipment, the pool pump and the surrounding area.

If you notice any of the problems described above, something in your system needs to be addressed and fixed immediately. When the cause of the leak is properly identified and the part is repaired, further damage will be prevented. This will save you money on repair bills, premature equipment replacement and down time.

If you start your pool system for the season and suspect you may an issue on your hands, get in contact with the plumbing professionals from Universal Plumbing and Heating right away. Contact our emergency service line 24/7 by calling 604-873-3551. 

← Back to Blog