Vimlinc Programmable Sprinkler Timer

It's been years I have searched for ways to keep the water in our food trucks from freezing during the winter months or at least during the operation hours. Went from using floor heater to heated cables to keep the pipes warm. Finally found a different use for this Sprinkler Timer. My set-up seem to work very well so I thought I share with people who could use this technique. Basically, from my tankless water heater (any water heater), the hot water will go to the hot side of the sink, but I also added the T connector so one side can be used as a way to drain out the water from the pipe when I'm done for the day. With that drain pipe, I connected this Sprinkler Timer so that every two hours, it opens up which trigger the pump to pump the water through the water heater. Since the sinks are not being used, the only way hot water can get out is through this sprinkler which feeds the hot water back to the clean tank. It keeps the water in the tank warm, it replaced the cold water in the pipe. That cycle repeats throughout the day. Note: I also create shut-off valves for both hot and cold water line so I can shut-off which ever line I don't need. It works nicely for my purpose and I hope this help.This timer allow you to set for how often it needs to open, how long, and starting time, etc. For the "how long" setting, tight now the smallest unit is 1 minute long, I wish there's away to adjust it for just 30 seconds. But, it was created for maintaining your lawn so it makes sense. I hope this help.