The Silvia Pro weight 44.1 Lbs. ( machine weight without water) versus the 30 Lb Silvia basic model. I was actually surprised it wasn't a greater difference because the Silvia Pro is a heavy chunk! I was sweating carrying this up a site of stairs. But in a way the weight of this beast speaks to it's quality. The Silvia Pro arrives in a box that is 52 Lbs. Use those knees to lift!