The Transfer pump was created for transferring water and or fluid at a very high speed. It pumps air just as well as water. It just depends on your needs as to how you configure it. You get both the transfer pump and surface pump on one set of plans for a very economical price.
The High Volume Surface pump is an incredibly simple design with a very high pumping capacity. This has made it a hit with many people. This pump will suck and pump in as little water as a depth of 1/8". You get both the transfer pump and surface pump on one set of plans for a very economical price.
Whether you are at a party or at a family gathering, this gun is not only fun but, very safe. The look on people's faces when you start peppering out rapid fire Ping Pong Balls is priceless.