How to solve “Water Hammer”

So you need to know How to solve “Water Hammer” in your water system…

Most scenarios involve a deep well/high volume geothermal pump that turns on when the AC unit calls for water…

Most of the time, when water hammer occurs, the installer has installed the same size pipe between the well head, the tank and the discharge. The pipe between the tank, the well supply, and the discharge should be the combined pipe sizes multiplied times three. In other words, 1.25″ from well + 1″ discharge + 1.25″ tank port = 3.5 and round up to 4″…this is the size manifold that must connect the well supply to the tank and discharge. This will allow water to flow freely without causing water hammer.

A good visual would be a 4″ pipe with tees installed at convenient points. These tees would be bushed back down to appropriate sizes for each of the three outlets. Any control accessories such as gauges and pressure switches or sensors should be installed in the manifold. Standard SCH 40 or SCH 80 could be used. DO NOT USE DWV pipe.