A system for protecting a fluid supply from a contaminant includes an anchor check valve having an inlet end and an exit end, the anchor check valve adapted to allow fluid flow through the anchor check valve from the inlet end to the exit end but prevent fluid flow through the check valve from the exit end to the inlet end; a dry-barrel fire hydrant in proximate fluid communication with the anchor check valve, the dry-barrel fire hydrant having a valve operating mechanism; and a hydrant shoe coupled to the anchor check valve, the hydrant shoe having a valve assembly adjustably connected to the valve operating mechanism of the dry-barrel fire hydrant.

A sealing member, whose unique manner of movement provides an improvement to a quick-connect valve assembly, for fluid control. A coupling force, required to couple the quick-connect valve assembly, containing the sealing member, is substantially reduced, resulting in an improvement to a typical quick-connect valve assembly (prior-art). The quick-connect valve assembly is comprised of at least a male coupler, a female coupler and the sealing member. During the resultant coupling, the sealing member's features ensure that said sealing member is firstly moved in a rotational manner and then secondly, if desired, in a more typical translational manner. The sealing member design allows backward compatibility with the typical quick connect valve assemblies. This backward compatibility allows a simple one-part replacement of a typical sealing member (prior-art) with said sealing member in order to benefit from this improvement.