Many people are unaware of the fact that there are different types of septic tank trucks that are used within the septic industry. The most common trucks are simply referred to as Septic Trucks. These trucks are a generic septic tank truck can carry anything from 300 gal to 5500 gal of waste. There are a variety of different makes and models that are available depending on the quantity of waste haulage, and performance of the vehicle. These vehicles are often customized to meet the needs of the business that is using them. For example, vacuum pumps can be customized to fit different sizes depending on the type of waste that is being vacuumed.