To measure a faucet cartridge and determine its size, you typically measure across the bottom of the cartridge to establish if it is for a 1/2 inch or 3/4 inch tap.
Measuring a faucet cartridge is crucial for identifying the correct replacement part when your tap starts leaking or malfunctioning. While cartridges come in various shapes and sizes depending on the faucet brand and type (e.g., single-lever, double-handle), one standard measurement helps distinguish between common sizes used in plumbing.
Determining Cartridge Size
The primary measurement used to determine the size classification (specifically 1/2 inch or 3/4 inch) involves the diameter at the base of the cartridge.
- Locate the Bottom: After removing the cartridge from the faucet, identify the widest point at the very bottom.
- Measure the Diameter: Use a ruler or, preferably, a caliper to measure straight across this bottom section.
Based on this measurement, you can typically determine the cartridge size:
- If the measurement across the bottom of the cartridge is around 24mm, then it is generally considered a 3/4 inch cartridge.
- If the measurement is more like 18mm, then it is likely a 1/2 inch cartridge.
This measurement helps establish whether your tap cartridge is for 1/2 inch or 3/4 inch pipework connection sizes, although the cartridge itself doesn't directly measure the pipe diameter but is designed to fit faucets built for those system sizes.
Quick Reference Table
Here is a simple guide based on the bottom diameter measurement:
| Bottom Diameter | Cartridge Size Classification |
|---|---|
| Around 18mm | 1/2 inch |
| Around 24mm | 3/4 inch |
Understanding this basic measurement is a helpful first step in finding the right replacement cartridge for your faucet. Always consult your faucet's manual or the manufacturer's website for specific part numbers and detailed dimensions if possible, as cartridge designs vary widely.
