Protect your Dilution Solutions Nutrient Delivery System with all the necessary accessories for a successful installation. Includes incoming on/off ball valve, an in-line pre-filter with 200 mesh (80 micron) screen, a pressure regulator with gauge (except for "DAB" kit), a fresh water test port, a check valve and all necessary plumbing connections to put it all together. Assembly required. For a complete Nutrient Delivery System, we recommend a Starter Kit, Mixing Chamber Kit(s), Monitor Kit, and a Water Hammer Arrestor Kit.