Editor's Pick
Best system monitor
Radon U-Tube Manometer
Cheapest way to verify your mitigation fan is running every day.
Best DIY Radon Supplies & Accessories
Essential tools and materials for maintaining your radon mitigation system, sealing entry points, and monitoring system performance. These products complement professional mitigation — they are not replacements for a certified installation.
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Our picks
Best for sump pits
Radon Sump Pit Cover
Essential for sump-based mitigation systems to seal soil gas entry.
Best quick fix
Radon Crack & Joint Sealant
Seal foundation cracks and pipe penetrations as a first step.
Best for crawlspaces
Crawlspace Vapor Barrier (20 mil)
Heavy-duty barrier to block soil gas and moisture in crawlspaces.
Detailed reviews
Editor's Pick
#1
Monitoring your mitigation system daily
Radon U-Tube Manometer
$10-$20
4.5
Pressure gauge
Pros
- Cheapest way to verify fan operation
- No batteries or power needed
- Easy DIY install
Cons
- Manual reading only
- No alerts if fan fails
#2
Sealing sump pits for radon mitigation
Radon Sump Pit Cover
$40-$80
4.3
Sealed cover
Pros
- Required for sump-based mitigation
- Reduces moisture and odors
- Clear lid for pump visibility
Cons
- Must match pit dimensions
- May need professional fitting
#3
Sealing foundation cracks and pipe penetrations
Radon Crack & Joint Sealant
$8-$15
4.4
Sealant
Pros
- Low cost DIY fix
- Reduces radon entry points
- Works on concrete and masonry
Cons
- Not a standalone mitigation method
- Must be applied to clean, dry surfaces
#4
Crawlspace encapsulation and radon reduction
Crawlspace Vapor Barrier (20 mil)
$80-$150
4.2
Barrier membrane
Pros
- Blocks soil gas and moisture
- Heavy-duty 20 mil thickness
- Covers large crawlspace areas
Cons
- Labor-intensive to install
- May need professional seam sealing
#5
Reducing basement moisture alongside mitigation
Basement Dehumidifier (50-70 pint)
$180-$300
4.3
Plug-inSome models have Wi-FiHumidity sensor
Pros
- Controls mold and musty odors
- Complements radon mitigation
- Built-in pump for continuous drain
Cons
- Uses electricity continuously
- Filter maintenance required
Side-by-side comparison
| Product | Price range | Best for | Rating | Action |
|---|---|---|---|---|
Radon U-Tube Manometer | $10-$20 | Monitoring your mitigation system daily | 4.5/5 | View |
Radon Sump Pit Cover | $40-$80 | Sealing sump pits for radon mitigation | 4.3/5 | View |
Radon Crack & Joint Sealant | $8-$15 | Sealing foundation cracks and pipe penetrations | 4.4/5 | View |
Crawlspace Vapor Barrier (20 mil) | $80-$150 | Crawlspace encapsulation and radon reduction | 4.2/5 | View |
Basement Dehumidifier (50-70 pint) | $180-$300 | Reducing basement moisture alongside mitigation | 4.3/5 | View |
Frequently asked questions
Can I reduce radon with DIY supplies alone?
DIY supplies like sealants and vapor barriers can reduce radon entry, but they are rarely sufficient on their own. The EPA recommends professional active soil depressurization (ASD) systems for homes above 4 pCi/L. These supplies work best as complements to a professional mitigation system.
What is a U-tube manometer and why do I need one?
A U-tube manometer is a simple liquid-filled gauge that shows whether your radon mitigation fan is creating suction. If the liquid levels are equal, your fan may have failed. It costs under $20 and every mitigated home should have one installed on the radon pipe.
How often should I check my mitigation system?
Check your U-tube manometer monthly and test your home's radon level every 2 years. Replace mitigation fans every 5-10 years depending on the model. If your manometer shows no pressure differential, contact a radon professional immediately.