on top of a roof or landscape applications may be tapped into the catchment system 100 this technology may create a substantial reduction in utility bills with respect to potable water and heating and cooling of a building fig2 is a view illustrating a portion of the catchment system 100 in a wall of the building 10 as shown a plurality of storage units 125 is disposed within a wall of the building 10 the storage units 125 are attached and supported to the existing wall components such as steel beams or studs the storage units 125 are interconnected by at least one connection line 120 in one embodiment the storage units 125 are pvc pipe in between the storage units 125 and the frame construction insulation may be blown or laid building architecture may include water holding capacity for a 2 year 100 year or 500 year design storm fig3 6 illustrate the storage unit 125 in the various frame structures of the building 10 for instance fig3 illustrates the storage unit 125 in a structural column 130 typically the structural column 130 is an insulated waterproofed wall member with a structural reinforcing bar the structural column 130 may be cast in place or poured in place as shown in fig3 the storage unit 125 may be connected to an interior tap 135 for use with interior water components such as a washing machine and or a water heater in.