Ernie a short time ago you responded to a question about tig torches that you ran a water line to your welder from a faucet and back to a sink drain. You said that you ran the water supply through a filter before entering your torch.
Could you explain why you routed the inlet water through a filter? I can think of a few reasons but I do not know why for sure. When I took a night class at our local adult education they had several tig machines that ran water right from the municipal supply line to the machines and then into a floor drain. You had to open and shut a valve on the water line that ran along the wall. I did not notice any filters. Some guys seemed to have trouble remembering about the valve.