Examples are the Upper and Lower peninsulas of the U.S. state of Michigan, the Scandinavian Peninsula and the Niagara peninsula.[1][2][3][4] The surrounding water is usually understood to be continuous, though not necessarily named as a single body of water.
A vacuum breaker is an attachment commonly placed on a bibcock valve or toilet or urinal flush valve, that prevents water from being siphoned backward into the public drinking water system. This prevents contamination should the public drinking water system's pressure drop. vacuum breaker typically contains a plastic disc that is pressed forward by water supply pressure, and covers small vent holes.
The higher pressure and shear volume may vent thru the vacuum breaker assembly. If so, then use the V651 vacuum breaker repair kit instead of the V551 vacuum breaker repair kit. When using the shut-off valve screw as a throttle, you also upset the balance of the valve and its self-cleaning feature.