An apparatus for removing impurities from water and/or wastewater and a method of installing a fluid distribution system in the apparatus. In the most preferred form of the invention, the fluid distribution system is an air scour system for directing air through the filter bed to assist in cleaning of the filter bed to remove impurities trapped in the filter bed during a service run. In the most preferred form, the method of installing the fluid distribution system in the filter bed is performed by imparting a force to the filter bed to permit the fluid distribution system to be installed in the filter bed without removing media. The fluid distribution system is preferably configured to permit the fluid distribution system to be readily installed in the filter bed and at an optimum orientation.

A hand-held water filter priming bags for priming a high performance gravity fed water filters has a flexible water container portion permanently sealed to a threaded filter connector component. A handle extends longitudinally along at least substantially the entire diameter of a base section of the filter connector component. The handle comprises a continuous flange spanning substantially the diameter of the base section and surrounding an outlet extending through the base section. Flexible water container portion is sealed to the continuous flange. An interior of the water container portion is in fluid communication with an exterior of the bag via the outlet. The bag outlet is configured for highly targeted pressurization of high-performance filters. A priming bag system includes the hand-held water filter priming bag. Methods of priming allow for efficient fully priming of high performance filters.