Flow Control Gate

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No, gates are not used for throttling flows in other than aquarium situations. Faucets in your house are more like globe valves in older faucets and cartridge type valves similar to ball valves in newer faucets. You may have a gate valve on the incoming water line from your water meter but it is intended to be fully open or fully closed only for maintenance.
When you are under house or boosted pressure and throttle with a gate you are causing cavitation across the gate and seat areas due to the velocity and pressure drop. Say you have 60 psi on one side and an open pipe or hose on the other, the velocity across the small cross surface area that is open is sonic velocity and causes tremendous wear plus vibration between the gate and the threaded shaft which leads to more wear. In an aquarium we may have 4 feet of head (1.7 psi) to dissipate across one side to the other so wear is negligible. Its rare to find an aquarium pump that pumps more than say 15-16 feet of head or less than 7 psi and most are in the 11-12 feet of head range or about 5 psi, you can put your finger over the end of the pipe and stop the flow.

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