 Flow rates, things we look at is like the number of bathrooms, irrigation, you've got farm needs, if you have an accessory dwelling unit. All these are taken into account for proper sizing of the pump for a constant flow of water to your home. We install USA-made flint and walling pumps. They're the best available. They're the most durable units that we have ever installed. Cushing & Sons, keep us in mind for your well and pump system needs.