The Foam Pro 2 + sprayer has a compressed air connector; an inlet valve located in the sprayer head that allows the insertion of air into the tank thanks to its universal schrader valve for connectors worldwide.IK Foam Pro 2 +. The upgraded Foam Pro 2 that comes equipped with a Schrader valve so you can manually pump the sprayer or use a quick connect air compressor attachment to pressurize the unit in under a second.