If you're looking for the best pump for your car wash, there are a few things you'll want to keep in mind. First, consider the flow rate of the pump. This is how much water the pump can move per minute and is an important factor in determining how quickly your car wash will be able to operate. Second, consider the pressure of the pump. This is how much force the pump can generate and will determine how well it can remove dirt and grime from your car. Finally, take a look at the warranty and service agreement that comes with the pump. This will protect you in case of any problems with your purchase.