Johnson Pump Valve Assembly f/Aerator Heads - 5-3/4" Overall Length. A variety of shapes configuration and options allow us to build these aerating heads to your specifications. Prototyping kits available. Shown here are some of the more popular sizes and configurations Specifications for Johnson Pump Valve Assembly f/Aerator Heads: Manufacturer: Johnson Pump Color: Black Features of Johnson Pump Valve Assembly f/Aerator Heads Overall length: 5-3/4" Two 3/4" Barbs Shut off Valve Package Contents: Johnson Pump Valve Assembly f/Aerator Heads Johnson Pump 70195: Valve Assembly f/Aerator Heads - 5-3/4" Overall Length