The pump room
Blog style practical advice and industry insights to help keep your systems running smoothly.
Pump issues vs System issues - The blame game
When things go wrong, it’s easy to assume the pump is to blame. However the real problem usually lies somewhere else in the system.
Businesses regularly replace pumps and swap out parts, only to end up right back where they started. Sound familiar?
Why the pump always gets the blame
Pumps are usually the most visible part of the setup, so when something goes wrong it’s often the first thing people focus on. But that often leads to costly misdiagnosis.
You might replace a pump, only to have the new one fail just as fast. And unless you take a step back and look at the whole system the cycle just repeats itself.
One client I worked with had gone through three different pumps in six months. The real issue? A partially blocked suction line causing the pump to cavitate and destroy itself from the inside out.
Common System Issues That Look Like Pump Failures
Here are a few system problems I often see that get mistaken for pump faults:
- Air leaks on the suction side
- Blocked, undersized or poorly laid out pipework
- Closed or faulty valves causing pressure build-up or restriction
- Power issues
- Faulty sensors and control equipment like VFD’s, relief valves or pressure switches
- Inconsistent supply to the pump (intermittent flow, starvation or low NPSHa)
These issues put stress on the pump, affect performance and often lead to premature failure. Yet the pump is just reacting to the poor system conditions.
If you drive your car without water in the radiator, it’s not the engine’s fault…
How to Find the Root Cause
If you’re dealing with repeat failures, poor performance or unexpected downtime… here’s a basic checklist to work through:
- Is the pipework properly sized and free from restrictions?
- Is there enough NPSHa for the pump to run smoothly?
- Are valves, strainers, or filters clean and open?
- Is the pump operating within its design range (flow, pressure, speed)?
- Is there any sign of air ingress or product supply issues?
- Are the materials of the pumps components compatible with what you are pumping?
If you’re not sure where to start, you’re not alone. Pumps don’t exist in isolation and problems often show up in unexpected ways.
Did you know?
Different types of pumps are often designed for different liquids. You can have a prefect installation in every sense of the word, but if it’s just not the right tool for the job. You will always have issues.
The Blame Game
There’s often a tug-of-war in this industry: “Your pump is the problem” vs “Your system is the issue.” The customer blames the pump… the supplier blames the system… and no one wins.
A big part of the problem is a lack of basic understanding about how systems work. Poor installation, bad pipework or running the wrong product through a pump can all lead to early failure. But instead of solving the root issue, people often just swap suppliers and brands, hoping the next pump will magically last longer.
One customer I dealt with was running thick, dirty oil straight through a standard pump. Unsurprisingly, the internals were wearing out fast. They’d already gone through a few pumps and were convinced the brand was the problem. But once they added a basic inline strainer to remove most of the grit, the same pump ran more than three times longer. Simple fix. Big result.
When pumps keep failing, many customers start looking for cheaper replacements just to keep costs down. It’s understandable. Decent pumps are expensive. But this often leads to a mindset where pumps are treated as disposable consumables, not critical system components.
The problem is these cheaper pumps usually wear out even faster, especially if the underlying system issues haven’t been addressed. So instead of saving money, the business ends up stuck in a costly cycle of poor performance, repeated failures and growing frustration.