Quick Answer:
If several faucet cartridges fail or start dripping shortly after replacement, the likely cause is high or spiking static water pressure in the house. Before replacing more parts, install a pressure gauge with a max-needle on an accessible hose bib and log the static and peak readings over 24 hours (especially overnight). If static pressure is above about 80 psi or you see high peaks, fix the pressure issue (adjust/replace the PRV, repair or add an expansion tank, add hammer arrestors) and then replace damaged fixtures.
Why This Happens
- Most modern faucet cartridges are designed for normal household pressures (typically 40–60 psi). Continuous high static pressure or sudden pressure spikes put excess load on seals and seats, causing leaks or quick failures.
- Pressure spikes can come from the supply system, a failing pressure-reducing valve (PRV), water heater thermal expansion without a working expansion tank, or water hammer from quick-closing valves.
- This problem often affects multiple fixtures at once. It can also cause related failures such as Toilet fill valves failing repeatedly.
Step-by-Step What to Do
1. Install a pressure gauge with a max-needle
- Buy a simple pressure gauge that has a max needle (also called a peak or maximum indicator) and attach it to an outdoor hose bib or other accessible spigot on the house supply.
- Make sure the gauge is rated for household water pressure (0–160 psi is typical).
2. Record static and peak pressures over 24 hours
- Note the static reading when no water is running (first thing in the morning and other quiet times). Leave the gauge in place long enough for the max-needle to catch any peaks.
- Record readings over at least 24 hours, paying special attention to overnight values when demand and pressure control issues often show up.
3. Interpret the results
- If static pressure is consistently under about 80 psi and peaks are small, the cartridges likely failed for another reason and can be replaced after normal troubleshooting.
- If static pressure exceeds ~80 psi or the max-needle shows high or frequent spikes, the house pressure must be addressed first.
4. Adjust or replace the PRV
- If you have a pressure-reducing valve and it’s adjustable, try lowering the setpoint to a safe range (40–60 psi). If the valve is old, sticking, or can’t hold pressure consistently, replace it.
- After adjusting or replacing a PRV, recheck pressures with the gauge to confirm the change.
5. Add or repair an expansion tank
- Thermal expansion from a water heater can raise static pressure. If you have a closed system, make sure an expansion tank is installed and not waterlogged.
- Check the expansion tank’s air charge and service or replace it if it’s failed.
6. Install hammer arrestors where appropriate
- If you see sharp pressure spikes that correspond to valve activity, install hammer arrestors near quick-closing fixtures (dishwashers, washing machines, some faucets) to dampen spikes.
- Properly sized arrestors and correct placement reduce shock and extend the life of cartridges and valves.
7. Replace damaged fixture parts after pressure control
- Only after the pressure is stable and within safe limits should you replace cartridges or other faucet components. Replacing cartridges while the pressure problem persists will likely result in repeat failure.
- When replacing, inspect seats, springs, and supply stops for damage and replace as needed.
8. Monitor and retest
- Leave the gauge in place for another day after repairs to confirm static pressure and peak behavior are controlled.
- Also watch at least a week of normal use to ensure cartridges remain dry and leak-free.
What Not to Do
- Don’t keep swapping cartridges without measuring pressure—high static will just kill the next one.
- Don’t ignore the PRV or expansion tank if your measurements show high pressure or spikes.
- Don’t attempt permanent repairs (like replacing a PRV) without confirming the actual pressure readings or without basic competence; improper work can make the situation worse.
When to Call a Professional
- If you can’t access or identify the PRV, or if adjusting it doesn’t hold pressure steady.
- If the expansion tank is hard to reach, waterlogged, or you’re unsure how to check the air charge.
- If pressure spikes persist after basic fixes, or multiple fixtures and appliances are affected; a licensed plumber can diagnose distribution issues and install PRVs or hammer arrestors to code.
Safety Notes
- Shut off the main water supply and relieve pressure by opening a faucet before working on faucets, cartridges, or the PRV.
- When working near the water heater, follow manufacturer guidance—draining or servicing the heater involves additional safety steps.
- Wear eye protection and gloves when servicing plumbing. If you’re uncomfortable with any step, hire a plumber rather than risk incorrect installation.
Common Homeowner Questions
- How long should a cartridge last? With normal pressure and use, many cartridges last several years; repeated short life usually indicates a pressure problem.
- Can I reduce pressure by partially closing the main shutoff? That’s not a reliable fix—use the PRV or call a pro. Throttling the main can cause inconsistent supply and may damage fittings.
- Will installing arrestors stop all leaks? Arrestors reduce spikes but won’t fix leaks caused by sustained high static pressure—address the PRV/expansion tank first and then replace damaged parts.
If you see other symptoms like electronic shutoffs tripping, also check pressure—High pressure triggers smart shutoff can explain that behavior.
Related Articles
If you’re troubleshooting a similar symptom, these guides may help:
For the full directory, see High Pressure Causing Fixture Damage.