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.
I'm thinking the regulator is intermittently allowing too much pressure to the appliances in the home, but I need to confirm that the supply pressure to the regulator is at a high enough pressure to blow out the water in a water manometer that only goes up to 15 inches of water column.