Whether you’re setting up a camp shower, caravan sink, ute canopy kitchen or off-grid water system, getting strong, reliable water flow from your 12V pump can make a huge difference to everyday comfort at camp.
But here’s something many people don’t realise: even a powerful pump can struggle if it’s installed incorrectly. In a lot of cases, poor flow isn’t caused by the pump itself – it’s caused by the setup around it.
The good news? A few simple changes can dramatically improve performance.
If you’re running a setup like the KickAss 12V Self-Priming Water Pump or the KickAss Portable Pump Pack, here are some practical ways to optimise your water flow and get the best possible performance from your system.
Remember: Pumps Push Better Than They Pull
This is probably the single most important thing to understand about 12V diaphragm pumps.
A water pump is designed to push water efficiently once water reaches the pump. While self-priming pumps can draw water uphill to some extent, they are far more effective when mounted close to the water source.
In simple terms:
- Short suction line = better performance
- Long suction line = reduced flow and more strain on the pump
That’s why it’s always best to position the pump:
- As close to the tank or jerry can as possible
- Ideally below or level with the water source
- With the shortest possible inlet hose
The less distance the pump has to “pull” water, the easier it can deliver strong, consistent pressure.
Keep The Inlet Hose Short & Straight
Long inlet hoses are one of the biggest causes of poor pump performance, especially in portable camping setups where people often run extra hose length “just in case”. The problem is that every additional metre of hose adds resistance, making the pump work harder to draw water through the system.
This is especially important on the inlet side of the pump. Once water reaches the pump, it can usually be pushed along quite effectively. But drawing water toward the pump is where performance starts to drop away. Tight bends, corrugated hose and kinked lines only make things worse, restricting flow even further.
For the best results, try to keep the inlet hose as short and straight as possible. A clean, direct path from the water source to the pump will usually deliver noticeably better pressure and smoother operation.
Small Air Leaks Can Cause Big Problems
One thing many people don’t realise is just how sensitive water pumps can be to air leaks. Even a tiny gap in a fitting or hose connection can affect the pump’s ability to prime properly.
If your pump sounds like it’s working hard but the water flow is weak, inconsistent or sputtering, there’s a good chance air is entering the system somewhere on the inlet side. Loose hose clamps, worn fittings, cracked hose or poorly sealed threads can all create issues.
This is particularly important with self-priming pumps like the KickAss 6L/min and 12L/min models. They’re designed to draw water effectively, but they still rely on maintaining proper suction within the system. A quick check over all your fittings can often solve flow issues immediately.
Use Reinforced Hose on the Inlet Side
The type of hose you use can also have a surprisingly big impact on pump performance. Standard garden-style hose might seem fine at first glance, but softer non-reinforced hose can actually collapse or suck inward when the pump is drawing water through it.
When this happens, water flow becomes restricted, making the pump work harder and reducing overall performance. In some cases, it can create intermittent flow issues that are difficult to diagnose because the hose may only partially collapse while the pump is running.
For the best results, it’s recommended to use a reinforced hose on the inlet side of the system. Reinforced hose features structural braiding or internal support layers that help the hose maintain its shape under suction. This allows water to flow more freely and helps the pump operate more efficiently, particularly in longer hose runs or higher-flow setups like 12L/min systems.
It’s a simple upgrade, but one that can make a noticeable difference to reliability and flow consistency.
Choosing Between 6L/min & 12L/min Pumps
Both the KickAss 12V Self-Priming Water Pump and Portable Pump Pack are available in 6L/min and 12L/min options, and choosing the right one really comes down to how you plan to use your setup.
The 6L/min versions are a great choice for smaller systems where controlled water usage matters more than maximum flow. They're ideal for things like compact camp kitchens, hand washing stations or lighter-duty shower setups where you want reliable pressure without chewing through your water supply too quickly.
The 12L/min options, on the other hand, are designed for higher-volume water delivery. If you’re running a larger camp shower setup, washing gear regularly, or supplying multiple outlets in a caravan or canopy build, the extra flow can make a huge difference to usability and comfort.
Neither option is necessarily “better” — it simply depends on whether your priority is water conservation or stronger, faster flow.
Voltage Matters More Than People Think
A surprising number of pump performance issues actually come down to power supply rather than plumbing. If the pump isn’t receiving enough voltage, it may run slowly, pulse inconsistently or struggle to maintain proper pressure.
This is especially common in DIY setups with undersized wiring, long cable runs or poor electrical connections. Even a quality pump can underperform if it isn’t getting stable power.
Making sure your wiring is appropriately sized and your connections are secure can have a noticeable impact on overall performance. It’s also important to use the correct fuse size for protection - both the 6L/min and 12L/min KickAss pumps are recommended to run with a 10A fuse.
Don’t Forget The Outlet Side
While most people focus on the inlet side of the system, restrictions after the pump can also reduce overall performance. Blocked shower heads, tiny nozzles, dirty filters or crushed outlet hoses can all limit water flow, even if the pump itself is working perfectly.
If your setup feels weaker than expected, it’s worth checking the entire system rather than assuming the pump is the problem. In many cases, improving flow is simply about removing unnecessary restrictions and allowing the system to operate more freely.
Portable Pump Packs Simplify The Whole Setup
For campers who want a simpler plug-and-play option, portable pump packs can take a lot of the hassle out of setup. Rather than mounting and wiring everything individually, the pump is already housed in a compact enclosure with fittings and wiring organised neatly together.
This makes them particularly useful for portable camp showers, ute trays, touring setups and temporary campsite kitchens where convenience and portability matter. They’re quick to deploy, easy to pack away, and help reduce the clutter that can sometimes come with DIY water systems.
Final Thoughts
When it comes to 12V water pumps, installation matters just as much as the pump itself. Even a high-quality pump can struggle if it’s mounted too far from the water source, fighting against long suction lines or dealing with hidden air leaks.
The good news is that most flow issues are surprisingly easy to fix once you understand how these systems actually work. Keeping the pump close to the tank, reducing restrictions and ensuring the system is properly sealed can dramatically improve performance without needing to upgrade equipment.
Get the fundamentals right, and your water setup will run smoother, quieter and more reliably — whether you’re washing dishes at camp, rinsing off after the beach, or enjoying a proper off-grid shower after a long day on the tracks.