Clarke CHT469
Price: £70.44 Extraction test time: One min, one sec
Have we gone mad? This compressor-driven unit is the fastest on test, and yet it gets the lowest score. Well, the quick time is a result of the fat bore tubes, which allows the thick oil to flow easily. Thin wall construction increases the internal area further, but this comes at the expense of durability – if forced around curves, the tubes tend to kink easily, which reduces suction power.