A pressure cleaner is only as good as its water supply. Even the most powerful SPITWATER machine will struggle if it’s not fed the right volume, pressure and quality of water.
Taking time to assess your site and set up the inlet correctly prevents faults, improves performance and extends your machine’s lifespan.
This article covers:
Your machine needs a consistent and sufficient flow of water to operate correctly.
If the incoming water supply can't keep up with your machine’s demand, you risk damaging internal components.
|
Machine Flow Rate |
Minimum Required Flow |
|
10 LPM |
12 LPM minimum |
|
21 LPM |
25 LPM minimum |
|
30 LPM |
36 LPM minimum |
Rule of thumb: Supply should be at least 20% more than the machine’s rated flow. This provides a buffer to avoid starvation or cavitation.
Too much inlet pressure can also be a problem - especially for machines with float valves, which typically max out at around 500 kPa (5 bar). Going beyond this can cause float valves to fail and the unit to leak.
If your water supply can’t deliver the minimum flow (e.g. only 15 LPM available but your machine needs 21 LPM), install a buffer tank.
Buffer tanks store reserve water to meet demand, preventing dry running and cavitation.
They're especially useful for:
SPITWATER offers compatible buffer tanks and low-level water shut-off switches for added protection.
|
Machine Type |
Pump Type |
Inlet Setup Recommendation |
|
High-Speed Pump |
Direct fed |
Minimum 7m flexible hose |
|
Low-Speed Pump + Bypass Cooling Tank |
Gravity/suck |
Minimum 2m flexible hose |
|
Machines with Bypass Cooling Tank |
Any |
No minimum hose length |
Note: Even if you’re using a short run from a tap, at least the final 2 metres must be flexible.
Water hardness varies widely across Australia. From 100 ppm on the Gold Coast to over 400 ppm in Adelaide. High mineral content can:
For hardness above 500 ppm, a water softener or chemical dosing pump may be required - especially for hot water machines.
◽ Check inlet pressure is within machine specifications
◽ Install a suitable filter between water source and machine
◽ Use a flexible hose of recommended length
◽ Avoid kinks, sharp bends or restrictions in hose
◽ Check water quality and address hardness if needed
◽ Test machine under load before starting regular operation
Correct water inlet set-up is a small step that makes a big difference.
By assessing your site and taking these measures, you’ll protect your investment and keep your SPITWATER tough and ready for years of reliable service.