Very detailed instructions
"Just fit under my kitchen sink. All parts included, but I needed to buy a different supply valve to fit my existing plumbing. I would have appreciated a plastic drilling template for placing the bracket holes, though. My favorite part is the leak detection shutoff valve, which has a spring-loaded “mousetrap” latch operated when moisture expands a paper “pill”. Plan on hiring a professional to drill the hole in a countertop for the faucet. The UV sterilizer is great, but check to make sure there is side clearance to install a new lamp. This is a well-designed filter system. I no longer have to purchase bottled drinking water, and the water tastes great!"