A-A-59423

Abstract

This Commercial Item Description (CID) covers vacuum interface valves used with sewage vacuum, collection, holding, and transfer (VCHT) systems aboard ships. Vacuum interface valves control the discharge from urinals to the sewage vacuum collection piping. Although the requirements of this CID primarily refer to vacuum interface valves used with urinals, they may be applied to the acquisition of vacuum interface valves intended for use with other plumbing waste sources such as shower or galley drains. <b><u>Intended Use:</u></b> Vacuum interface valves covered by this CID are intended for use in VCHT systems on new construction ships or as stock replacements for VIVs currently installed on existing ships. When acquiring VIVs for replacement purposes, the contracting activity must ensure that interface requirements are specified for inlet connections, outlet connections, and mounting feet (if used), which are compatible with the VIV being replaced to avoid the need for costly ship modifications. Acquisition for new construction allows for more latitude in VIV dimensions and interface requirements, enabling more suppliers to bid thereby increasing competition. <br>