They reduce the amount of water released from a tap by up to 50 percent, with almost no noticeable difference in pressure.
Some dishwashers require the temperature to be slightly higher.
Check with the manufacturer or consult your owner's manual for your specific model. Fix leaky faucets. Repairs can be as simple and inexpensive as replacing a worn-out washer. Insulate hot and cold water pipes. If pipes are exposed beneath your home or in an unheated garage, insulate them with special pipe-insulating foam.