All of the AquaBead LH filters utilize a revolutionary design to increase flows while not using any more electricity than normal. It's quite simple actually, since the biggest flow robber of filters is the multiport valve, we only use the multiport valve when backwashing and bypass it while in normal filtration mode. If you are looking for a filter that has the lowest restriction of any filter made, this is it. You can use the most energy efficient pump on this filter and receive maximum flows with very little head pressure. Comes complete with all 2" union fittings for maximum flow.