You must have a ReWater grey water filter package to attach a ReWater irrigation package to. This is the starter irrigation package to attach to any ReWater filter package. This contains the minimum amount of every part needed for a complete, legal, greywater irrigation system for a small landscape (500-2,000 sq ft, depending on what you’re planting and its spacing). Additional proprietary parts may only be purchased through ReWater Systems with an irrigation package. Proprietary parts may only be purchased through ReWater Systems with an irrigation package.