06.Low flow high pressure cleaners
One option for manually cleaning your car is a low flow high pressure car cleaner. These all use a pressurised spray, but not so high as to damage the paint on your car. We tested three low flow high pressure car cleaners to see how they performed and whether they were easy to use. All three have been accredited by the Smart Approved Watermark and we found we didn’t need to use more than 26L per wash – little more than a bucket and sponge option. With a little practice, it would be possible to lower even this amount.
All low flow high pressure car cleaners can be used in multiple locations, such as cleaning at a camping site, and also on your bike or boat; however, we found none of them claim, or are able to clean a car directly, still requiring a sponge and detergent to clean effectively.
What we found
Both the Car Cube and Watersaver use a car battery to pressurise and were more effective at initially wetting the car than the Autowasher which is manually pressurised, however the Autowasher's effectiveness may possibly be improved by removing its filter. The Car Cube and Autowasher came integrated with a water container so it didn’t require an extra bucket like the Watersaver.
L to R Autowasher, Car Cube and Watersaver