What is likely happening
The relief valve opens when pressure goes above its setting. If it keeps popping, the compressor's pressure switch may be failing, or the valve is set too low or worn.
What you can safely check
- Watch the gauge when the valve opens and compare with the tank's rated pressure.
- Note whether the compressor keeps running past its normal cut-out.
What an inspector will look at
- Relief valve rating and setting
- Compressor pressure switch
- Gauge accuracy
Does this affect compliance?
Relief valves must match the vessel rating; a mismatched or tampered valve is a code defect.
When it becomes urgent
Shut the compressor down if pressure exceeds the tank's rating.
We can help with this
Pressure vessel inspection is something Insparisk does nationwide. To see the local rules for your building, open this in the interactive Problem Solver.
Request pressure vessel inspectionTalk to an advisorGeneral guidance only, not a substitute for a licensed inspection or emergency services. For any gas odor, carbon monoxide alarm, fire, or trapped occupant, call 911 first.