This is a replacement check valve for the Honeywell BA295S Back Flow Preventer (RPZ Valve).
Flowstar, our parent company has an interesting article relating to Backflow Prevention in the Technical section on their website.
Resideo Braukmann BA295S Class 4 Backflow Preventer RPZ Valve Datasheet
Resideo Braukmann BA295S Class 4 Backflow Preventer RPZ Valve Installation Manual
WRAS Approved Installation Method for RPZ Valves
