A calorie is a measure of energy, just as a pound is a measure of weight and a mile is a measure of distance. So the amount of energy you exert in doing an activity is measured by the calories burn rate.
A water pressure regulator is a plumbing valve that reduces the water pressure coming from the main water line into the house.o determine if you need a water pressure regulator test the water pressure of the main water supply to your house. You can buy a pressure gauge for a local hardware or home improvement store.
This will then give a reading of the water pressure coming out of the source. If it is at or above 40 PSI, you will want to put a water pressure regulator for RV onto the water hose before connecting your water system up to it. Sometimes it is a good idea to put a water pressure regulator for RV on regardless of the reading.