If you have municipal water and your water pressure is low, that can you do about it? Most municipalities will not allow you to put a plump on your main water line, but most will allow you to put a well tank on your main service line. What does a well tank do for you?
If you add a well tank on your main service line, it will store water pressure and make it available for you when you need it. It helps regulate flow, and is one of the best plumbing tricks in the book.