Double diaphragm pump and cabinets are used for Filling Buckets. Constructed of Stainless Steel, this cabinet has controls and a filling spout. Can also be used for bags and containers. This is a Pneumatic Pump. Double diaphragm pump and cabinets are used for Filling Buckets. Constructed of Stainless Steel, this cabinet has controls and a filling spout. Can also be used for bags and containers. This is a Pneumatic Pump.