Step 5 · Take Detailed Photographs and Measurements
Documentation is crucial. Use your smartphone or a digital camera to take several clear, well-lit photos of the valve from multiple angles. Capture the entire valve body, a close-up of the cartridge, any visible part numbers or logos, and the way the cartridge is secured (clip, nut, etc.). Next, use a tape measure or calipers to take key measurements. Measure the length of the cartridge, the diameter of the escutcheon plate screw holes (center to center), and the diameter of the valve stem. These photos and measurements will be your primary reference when searching for parts.