All too many times a bid is turned in only to be told, “We need to look at VE options.” There are plenty of mechanical units that can be downgraded, architectural features that can be sacrificed, or peel back every division to see what can possibly be optimized for that extra dollar.
Siphonic storm drainage brings a number of benefits to a project, most notably cutting the storm pipe diameter in half by eliminating air from entering the pipework. Following the exact routing a gravity storm system takes, siphonic storm drainage will always deliver cost savings along with a technical and design benefit.