Renus 5 in fire truck intake valve USED

Used condition surplus from a fire department. This valve is UNTESTED since we have no way of testing. Please understand it is sold as is and may need new seals or minor repairs to get fully operational. Has moderate cosmetic wear from routine use including scratches, scuffs, dings, light rust, water corrorison etc. 
This appears to be a non controlled intake valve with a pressure relief valve. I believe this is technically a backflow preventer and opens automatically if water comes in the intake BUT I MAY BE WRONG. Has a 5 inch female discharge to attach to a fire engine and a 5 in STORZ intake. The storz gasket is cracked and probably will need to be replaced.