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Top rated expansion plugs
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Best overall Arrowhead Brass & PlumbingARROWHEAD Brass Pipe Fitting, Hot Water Expansion Plug, 3/4 inch NPT
Reliable brass construction with easy installation. Works well for both water and air pressure testing.
- Durable brass
- Leakproof seal
- Easy to install
- Price higher than plastic
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Best budget pick RUIANFasLok PVC Expansion Plug, 1-1/2 inch, for Sewer & Drain Test
Cost-effective PVC plug ideal for sewer and drain testing. Lightweight but reliable for low-pressure applications.
- Affordable
- Lightweight
- Good for low pressure
- Not for high pressure
- Less durable than metal
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Best for professionals Commercial Pipe PartsRIDGID 33193 Model 10 Expansion Plug, 1-1/2 inch, with Wing Nut
Heavy-duty steel plug with wing nut for quick tightening. Trusted by plumbers for pressure tests up to 150 psi.
- High pressure rating
- Wing nut for easy use
- Rugged steel
- More expensive
- Heavier
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Best rubber option OateyOatey 38978 Rubber Expansion Plug, 3/4 inch, for Plumbing Test
Flexible rubber plug conforms to pipe irregularities. Great for temporary sealing during repairs.
- Flexible seal
- Easy to remove
- Low cost
- Not for high pressure
- Can dry out over time
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Best small diameter EFIELDCheney 1/2 inch Brass Expansion Plug, for Air and Water
Compact brass plug for 1/2 inch pipes. Precise fit and corrosion-resistant.
- Corrosion resistant
- Precise fit
- Compact
- Only small size
- Pricey for size
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Best for cast iron TechnicalIPS 4-inch Cast Iron Expansion Plug, Heavy Duty
Designed specifically for cast iron pipes. Strong grip and withstands high pressure.
- Strong grip
- For cast iron
- High pressure
- Heavy
- Niche use
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Best with O-ring CAI - SHAW PLUGSMueller Streamline 3/4 inch Brass Expansion Plug, with O-Ring
Includes O-ring for extra leak protection. Suitable for water and gas lines.
- Extra O-ring seal
- Versatile
- Reliable brand
- Slightly bulky
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