McMaster 4599K43 Gradual On/Off Valve, Bronze Body & Gate, Easy-Maintenance, Wheel Handle Rising Stem, 1/2 NPT Female, Class 150, MSS-SP-80

Maintain and repair these valves while they're still inline — you can disassemble the stem so there's no need to unthread the pipe connections. Also known as gate valves, they open and close gradually to prevent sudden starts and stops. Control the flow by turning the wheel handle multiple times. This gives you more control than a pull handle. Made of bronze, these valves have good corrosion resistance.

Valves with a rising stem lift the handle as they open and lower it as they close. At a glance, you can see if flow is on or off. The stem is isolated from what's flowing through your line, giving these valves a longer lifespan than valves with a nonrising stem.