Constitutional monarchy. In a constitutional monarchy the post of the head of state is usually passed (by some form of primogeniture) within a royal family. In a constitutional monarchy the head of state is normally the theoretical head of the executive, producing phrases like Her Majesty's Government. In some instances the monarch (or in states in the Commonwealth of Nations a governor-general) may chair the cabinet, though they play not role in policy formation.
A safety vacuum release system usually is simple to install and test, as long as a few basic rules are followed. By Dunia Hamza. A safety vacuum release system (SVRS) is a system or a device that disables a pool pumpâs suction ability so that a body or object trapped against the suction outlet is freed.
Atmospheric Vacuum Breaker The atmospheric vacuum breaker (AVB) assembly is one of the most simple and least expensive types of backflow preventers. The AVB contains an air inlet valve, check seat and an air inlet port. Water flowing through the AVB causes the air inlet valve to close against the air inlet port. When normal water flow is stopped, the air inlet valve falls to form a block for backsiphonage. The AVB protects against non-health hazards or health hazards under backsiphonage only.