Your pool pump is the heart of the system. Everything else depends on it. When it fails, water stops circulating, chemistry falls apart, and algae moves in fast. For pool owners across Mosman, Randwick, St Ives, Turramurra, Northbridge, Castlecrag and the wider North Shore, Eastern Suburbs and Northern Beaches, pump problems are one of the most common reasons we get called in.
This guide covers what to look for, how to keep your pump running well, and what our Pool Techs say makes the difference between a pump that lasts and one that costs you money.
Getting the Size Right
An undersized pump struggles to turn the water over properly. An oversized pump wastes energy and can put unnecessary stress on your filter and plumbing. Neither is good.
The right pump for your pool depends on the volume of water, the pipe diameter, the distance from the pump to the pool, and whether you have any water features or a spa connected. A standard 8 to 10 metre residential pool in Randwick or Cremorne will have different requirements to a larger lap pool in St Ives or a tiled pool with a separate spa in Castlecrag.
If your pump was installed by a previous owner or is more than ten years old, it is worth having it assessed. Many pools we service across the Northern Beaches and North Shore have pumps that were never correctly matched to the pool in the first place.
Choosing a Quality Brand
Not all pumps are equal. Brands like Neptune, Hayward, Davey and Astral have strong reputations in the Australian market for durability and parts availability. Variable speed pumps from these manufacturers are now the standard recommendation for most residential pools because they run quieter, use significantly less energy, and allow you to adjust the flow rate to suit your pool’s needs.
We see cheaper imported pumps fail within two or three seasons regularly. When the pump goes and parts are unavailable, you are looking at a full replacement. Buy quality once.
What to Check Regularly
You do not need to be a technician to keep an eye on your pump. A few basic checks go a long way.
- Listen for changes. A healthy pump runs with a steady hum. Rattling, grinding or a high-pitched whine usually means something is wrong, either a worn bearing, debris caught in the impeller, or air in the system.
- Check the basket weekly. The hair and lint basket in the pump housing collects debris before it reaches the impeller. A blocked basket restricts flow and puts strain on the motor. Empty it when it is half full, not when it is packed.
- Watch for leaks. Any moisture around the pump housing, fittings or the shaft seal is worth investigating early. Small leaks become big leaks quickly, especially in summer.
- Check the pressure gauge on your filter. If the pressure is running high and the pump sounds like it is working harder than usual, the filter may need backwashing or the impeller may be partially blocked.
- Look at your water clarity. Cloudy water that chemicals are not fixing is often a circulation problem, not a chemistry problem. Before spending money on treatments, check that the pump is running at the right flow rate for the right amount of time.
What Our Pool Techs Say
We asked the team what they see most often when they arrive at a pool with pump problems.
The most common issue is a pump that has been running in a degraded state for longer than the owner realised. The signs were there, a slight noise change, a small drip, a filter pressure that was creeping up, but nothing dramatic enough to prompt a call. By the time it fails completely, the motor is gone and sometimes the impeller and seal housing need replacing too.
The second most common issue is a pump that is the wrong size. Either underpowered for the pool, or a high-flow pump running through undersized pipework, which creates back pressure and accelerates wear.
The advice is straightforward. If something sounds different, get it checked. If the pump is more than eight years old and you have not had it serviced, book an inspection before summer. The cost of a service call is a fraction of the cost of a full pump replacement.
When to Repair and When to Replace
This is a question we get asked regularly across our service areas, from Northbridge and Mosman to Turramurra and Randwick.
A pump that is under seven or eight years old with a failed seal, worn basket lid or minor impeller damage is usually worth repairing. Quality parts are available and the motor still has life in it.
A pump that is older, running inefficiently, requiring repeated repairs or no longer supported by available parts is generally better replaced. A modern variable speed pump will pay back the difference in energy savings within a couple of seasons.
We will always give you an honest assessment. If a repair makes sense, we will repair it. If replacement is the better long-term decision, we will tell you why and give you options.
Getting It Right From the Start
Pool pump problems are rarely sudden. They develop over time and they are almost always preventable with regular maintenance. If your pump is part of a regular service schedule, our Pool Tech will catch early warning signs before they become expensive ones.
If you are in Mosman, Randwick, St Ives, Turramurra, Castlecrag, Northbridge or anywhere across the North Shore, Eastern Suburbs or Northern Beaches and you have questions about your pump, book a free pool assessment. We will take a look and give you a straight answer.
The Ultimate Guide to a Sparking Pool - 12 Essential Tips.
