1PRESSURE REGULATOR WITH WATER FILTER: Improved pre filter with an accurate water pressure gauge that monitors and adjusts the water pressure coming out in real time. The pre filter itself comes with 1 inch threads and an additional adapter for 1/2inch sizing. Please check the size you need before purchasing. 2REUSABLE WATER FILTER: The pre filter can be used for a wide range of domestic water fixtures. It effectively filters impurities, reduces scale clogging, extends the life of the equipment, and protects the entire domestic water system from the source. (No drinking water filter). 3PREMIUM WATER FILTER: The filter is made of food grade safe 304 stainless steel, with a filtration accuracy of 40 microns, which is not easy to corrode and rust. The interface is made of brass, durable and safe. Explosion proof transparent filter housing is made of aviation polymer material, anti freezing. 4EASY TO INSTALL: Quick insert cartridges are easy to assemble and require no professional instructions. The water filter should be installed perpendicular to the pipe with the drain ball valve facing down. The direction of the arrow on the valve body indicates the direction of water flow. The drain ball valve closes after installation. 5EASY TO CLEAN: If there is some adhesion on the screen of the pre filter, the screen should be cleaned in time. Open the drain ball valve to empty.1 x Water Pressure Reducer1 x Pressure Gauge4 x Screw Accessory2 x Rubber Ring2 x Plastic Accessory1 x Instruction Manual