WaterFed® products change the way window cleaning professionals conduct business. It’s important to know how to operate and maintain these valuable window cleaning systems. To understand how pure water effectively cleans windows as high as 90 feet (about 10 stories), let’s take a look at its water flow process. In this resource, we discuss water flow as it pertains to WaterFed®. 

System Types & Factors that Determine Water Flow
While all WaterFed® pole systems (WFP) function similarly, the pressure you can expect from your exact system will depend on a few different factors. First, though, it’s important to note that water flow in a WFP is not the same as pressurized window cleaning.

1. Gallons Per Minute
First, water flow is measured by the type of window cleaning system. Each type will determine how many gallons per minute of pure water can be filtered through the pole. Regardless of what system you’ve selected, each has sufficient water flow and pressure to clean and rise windows, both low and high-rise. The gallons per minute for each system is as following:

DI System - pure water is pushed through a maximum of two filters. You can expect a steady stream of about 5 gallons per minute with a cost of $1 to $2 per gallon. 
Multistage System - pure water travels through more filters, producing a low-pressure water flow. You can expect about .65 gallons per minute with a cost of $.02 per gallon. This system is much more cost effective for producing clean water.
Multistage with Pumps - this is the same process as multistage window cleaning system with the added use of a pump to speed up the process. The water flow does not strictly rely on gravity. You can expect about .75 to 2 gallons per minute, depending on the pump and the cost stays at $.02 per gallon. This system is ideal for cleaning windows higher than four stories.