Abstract: A rainwater harvesting prefilter having a filter drum. The filter drum includes a fluid inlet configured to be fluidly connected to a fluid entrance pipe of a rainwater collection system and a fluid outlet configured to be fluidly connected to a cistern tank. A filter assembly is disposed in the filter drum. The filter assembly includes a filter support plate (with supporting components as needed) suspended in the filter drum such that the filter support plate spans across and substantially covers a width of the filter drum to separate the filter drum into an upper chamber having the fluid inlet and a lower chamber having the fluid outlet. A plurality of spaced-apart apertures are disposed in the filter support plate. A plurality of filter socks are positionable in the plurality of spaced apart apertures such that filter socks extend downward from the filter support plate into the lower chamber.

Abstract: A security barrier apparatus which may be used in conjunction with an existing security gate or may be used as a stand-alone security barrier gate. The system uses a passive restraining device comprising a bollard having at least one catch horn extending therefrom which engages a corresponding structure on the gate to restrain the gate when impacted.

Abstract: A system for upgrading new and existing gates or barriers to provide improved crash barrier rating. This system comprises a reinforcing attachment to the gate or barrier and improved reinforced bollards with catch hooks to absorb the energy of impact from a vehicle. The reinforcing attachment is an arrangement of cable and structural members that provide for increased reinforcement by ensuring that the load is distributed on the cable to minimize the risk of breakthrough as a result of cable failure. The bollards have been improved by strengthening the catch hook attachments and adding reinforcement positioning elements to facilitate proper assembly.