If you are wanting to install hose connectors, please purchase a 322h (which has 3/4" threads with the hose fittings already installed. The Mounting clips are available for purchase with the 322h as an optional extra.) The 'B' unit { B is for 3/4" BARE threads} is for when you would like to use your own 3/4" BSP threaded fittings. Reversible- if the flow reduces, remove the unit and re-install it in the opposite direction. Flush the dirt away. Compact, and can be mounted in any direction, e.g. verticle or horizontal. Removes chemicals for approx. 5000 L - great tasting water. Uses a full bed of SilverSafe® Silver coated crystals to kill harmful bacteria. Prevents Giardia, cryptosporidium. No set replacement times. Safe even after periods of non-use. No need to refrigerate. Sealed- no cartridges Produces great tasting water for longer than domestic units - "...its the SilverSafe® that sets B.E.S.T. apart from the rest!" {Caravan and Motorhome magazine}