Single-Handle Monitor Cartridge

What is this?

This is a high-quality replacement cartridge designed for single-handle pressure-balancing shower valves. It is the internal component responsible for regulating both the flow of water and the temperature mix in shower systems manufactured after 1993.

What does it do?

• Stops Drips and Leaks: If your shower head is dripping or water is leaking from the handle area, this cartridge provides a fresh, watertight seal to eliminate waste.

• Pressure Balancing: It features a built-in pressure-balancing mechanism that maintains a consistent water temperature. This protects you from "shower shock"—sudden changes in temperature when a toilet is flushed or a dishwasher starts elsewhere in the building.

• Scald Protection: The unit includes an adjustable temperature limit stop, allowing you to set a maximum hot water setting for increased safety in your home.

• Smooth Operation: Replacing a worn or mineral-clogged cartridge restores the effortless, smooth rotation of your shower handle.

Will it fit my sink?

This part is specifically designed for 1300 and 1400 series single-handle tub and shower valves. It is easily identified by its "blue" color (though some variations may vary) and is the standard professional choice for maintaining pressure-balanced shower systems. If your shower has a single handle that you rotate to increase temperature, this is the core part required for repair.

What comes in the box?

• Replacement Cartridge

• O-Rings and Seals

• Installation Instructions

The Replacement Cartridge is an essential maintenance part that ensures your shower remains safe and leak-free. It is constructed from durable plastic and high-grade seals for long-term performance.