... note that legally you must have a backflow prevention valve attached too (expensive). This is required so that if the sprayer ever accidentally falls into the toilet when it hasn't been flushed after a poo, and then the sprayer lever malfunctions so that the holes are open, and then the mains water pressure suddenly drops so much that a vacuum effect is created, there is a theoretical chance that pooey water could be sucked into the mains pipes and the drinking water supply could be contaminated. I'm not certain how the Little Squirt gets around this rule, or maybe the onus is all on the house owner/installer and not the manufacturer. The staff at Bunnings are quite happy to help you out without insisting you buy a valve.
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