Radon Guide Blog
Radon Mitigation System Maintenance for York, PA Homes
Your radon system needs almost no upkeep, but a little attention keeps it working. Here is a simple York, PA maintenance checklist for the fan, the gauge, and retesting.
A radon system is designed to run for years
A properly installed radon mitigation system is built to run quietly and continuously for many years with very little upkeep. The inline fan maintains negative pressure under your slab or membrane around the clock, and the piping is durable PVC that does not require regular servicing.
Our York County radon mitigation pillar guide covers what a working system should look like.
Check the manometer gauge
Most systems include a U-tube manometer, a small fluid gauge mounted on the piping that shows the system is pulling vacuum. Checking it takes a few seconds every month or so:
- The two fluid levels should be uneven, which means the fan is creating suction. If they sit level, the fan may have stopped or lost pressure.
- Note the normal reading when the system is working so you can spot a change.
- If the levels go flat, contact your certified mitigator to inspect the fan or piping.
Keep the exhaust clear
The system exhausts above the roofline, away from windows and openings. Make sure nothing blocks that exhaust over time:
- Trim back tree branches or vegetation that grow near the pipe outlet.
- Do not stack items against an exterior pipe run.
- Check that snow or debris has not built up around the exhaust in winter.
Retest periodically
Even a working system deserves a periodic check that radon is still low. A good rule of thumb is to retest every two years, or sooner if you make major changes to the home like finishing a basement, adding an addition, or altering HVAC equipment.
In York County, the median radon level fell from 12 pCi/L before mitigation to 1.0 pCi/L after, across systems reported to the Pennsylvania DEP, which is the kind of drop a retest should confirm is holding.
Source: Pennsylvania DEP, Radon Mitigation System records (data.pa.gov), York County systems reported 2024–2026. Retrieved September 30, 2026.
Quick answers
Frequently asked
How often should I retest after a system is installed?
Every two years is a reasonable baseline, and sooner after major home changes like finishing a basement or altering HVAC equipment. A short-term kit or continuous monitor is enough for a routine retest.
What does a flat manometer reading mean?
It usually means the fan has stopped or lost suction. If the two fluid levels sit even instead of offset, contact a certified mitigator to inspect the fan or piping before assuming the system is still working.
Our York, PA team put this article together for local homeowners in York and York County. Always verify contractor certification with PA DEP before hiring.
Next steps for York, PA homeowners
- 1
Test if you have not already. A short-term kit or a professional test is the starting point, not a guess based on your neighbor's result.
- 2
Confirm your result. Know your actual number before deciding on next steps.
- 3
If elevated, contact PA DEP-certified mitigators. Use the state directory, not a general contractor search.
- 4
Retest after work is completed. A finished install should come with a follow-up test that confirms the fix actually worked.