Flow Control Spindle Assembly

What is this?

This is a professional-grade replacement spindle assembly designed for pressure-balancing shower valves. It is the central component that manages water flow and maintains temperature balance within the valve body.

What does it do?

• Balances Water Pressure: The internal stainless steel piston automatically adjusts to changes in hot and cold water pressure. This prevents "shower shock"—sudden bursts of scalding or freezing water when a toilet is flushed or a faucet is turned on elsewhere in the building.

• Resolves Common Leaks: Replacing this assembly is the standard solution for fixing a shower head that drips when turned off or a handle that leaks from the front.

• Smooths Operation: If your shower handle has become stiff or difficult to rotate, this new assembly restores the original smooth, effortless movement of the valve.

• Anti-Scald Protection: Built as a critical safety feature, it ensures the water temperature remains stable within a safe range during your shower.

Will it fit my sink?

This spindle is designed for use in a wide variety of commercial and residential tub and shower mixing valves. It is a universal replacement for standard pressure-balancing units used in facilities since the late 1960s. If your shower utilizes a single-handle system that you rotate to control temperature, this is likely the core part needed for maintenance.

What comes in the box?

• Flow Control Spindle

• Cap Gasket

• Installation Instructions