ECWS offers Pre-Plumbed packages that we call our Plug-N-Play system. We Pre-Plumb a system for you by sizing the BTUs, Flow rate and Foot print that you require. Its as easy as connecting the gas, exhaust, power, inlet and outlet water. You are your local plumber can have it up and operational with very little downtime. Advantages of a Pre-Plumbed package are less downtime, less cost of an install, sized properly for your needs and the need for less downtime.