Building camping sink, need advice
My question is 2 fold, first I am wondering how sinks with foot pedals that turn on and off the water work, because they are below the faucet and I though water comes out from the faucet because of gravity. A example of what I am talking about is here: Hands Free, Foot Operated, Water Mixing, Single Pedal Control Valve Unimax Plumbing #PLMA-24 My second question is I am thinking about building a camping sink made from 5 gallon buckets, as seen here https://www.youtube.com/watch?v=embBA1LASpA but it works with a foot pump that you have to pump constantly for any water to come out and it looks like not much comes out and it is very sporadic. I like the idea of shutting the water on and off with your feet (but not having to constantly pump it) so I am wondering if I mount the freshwater bucket on a table or hang it from a tree if gravity will make it so I don't have to pump the foot pedal, but just step on it like the foot pedal in the first link I posted. If that will work do I use the same foot pump they used or some different kind of foot valve, and what kind?