Filter headloss varies as a function of solids loading, flow rate and water temperature. In the Centra-flo™ Gravity Sand Filter, the available headloss is defined as the difference in water levels between the normal filter water level and the water level in the downstream unit process.

The recommended design headloss for the Centra-flo™ Gravity Sand Filter is 48” or greater. This will insure that the filter will have enough driving head to overcome the frictional losses through the filter media, piping and accumulated solids. Normal operating headloss ranges from 6” to 24”.