Top Expansion Plugs for Hydraulics and Pneumatics

The best Expansion Plugs includes Dreyoo 4 Inch Steel Drain Pipe Plug, Oatey 33403 Pipe Gripper Mechanical Plug, Cherne Rubber Test Ball Plug (2 in.) and many others as mentioned below.

1

Dreyoo 4 Inch Steel Drain Pipe Plug

  • Includes 1 assembled 4" cleanout plug.
  • Forms an airtight seal with gasket.
  • Durable rubber and metal construction.
  • Stainless steel wing nuts for stability.
  • Easy installation without wrenches required.
  • Suitable for various indoor and outdoor uses.
  • Prevents water from entering pipes effectively.
  • Average Rating out of 5:
  • Price Range: $13.99
  • Color: Silver, Black
  • Material: Metal, Rubber
2

Oatey 33403 Pipe Gripper Mechanical Plug

  • Seals or holds pressure for piping system testing.
  • Designed for 4-inch open-ended pipes.
  • Constructed with durable ABS glass-reinforced plates.
  • Mechanically seals at pipe's end, preventing drop.
  • Rated for 17 PSI or 40 ft. head pressure.
  • Suitable for long-term applications and reliability.
  • Plastic body resists rust and corrosion effectively.
  • Average Rating out of 5:
  • Price Range: $8.95
  • Color: Red
  • Material: Plastic
3

Cherne Rubber Test Ball Plug (2 in.)

  • Natural rubber for optimal flexibility and memory.
  • Seals both round and irregular pipe shapes.
  • Effective range: 1.9 to 2.25 inches.
  • Compact size for easy access through tight openings.
  • Maximum back pressure capacity: 13 PSI.
  • Zinc-plated chain prevents sliding during use.
  • Broader expansion compared to traditional mechanical plugs.
  • Average Rating out of 5:
  • Price Range: $30.79
  • Color: Black
  • Material: Rubber
4

Cherne 3-Inch Test-Ball Plug (270032)

  • 3-inch nominal size for versatile applications.
  • Tests DWV systems up to 13 PSI/30 ft.
  • Natural rubber body ensures excellent expansion.
  • Inflatable design seals out-of-round pipes effectively.
  • Standard tire air fitting for easy connections.
  • Ring and chain assembly prevents plug loss.
  • Durable construction for reliable performance during tests.
  • Average Rating out of 5:
  • Price Range: $33.25
  • Color: Black
  • Material: Rubber
5

The Hillman Group Neoprene Expansion Plug [2-Pack]

  • Durable neoprene rubber construction for long-lasting use.
  • Corrosion-resistant steel materials ensure reliability.
  • Available sizes: 1"-1-1/8" to 1-3/4"-1-7/8".
  • Secure hold prevents leaks and spills.
  • Not for capping food, drinks, or medicine.
  • Ideal for various household and industrial applications.
  • Convenient 2-pack for multiple uses and projects.
  • Average Rating out of 5:
  • Price Range: $11.00
  • Color: Black
  • Material: Neoprene
6

TheClouds 2" Rubber Pipe Test Plug

  • Made of durable natural rubber material.
  • Max inflation pressure of 40 PSI.
  • Diameter expands from 1.75 to 2.25 inches.
  • Includes chain and large pull ring design.
  • Easy inflation with standard bicycle pump.
  • Ideal for various plumbing applications.
  • Convenient deflation with copper valve core wrench.
  • Average Rating out of 5:
  • Price Range: $22.99
  • Material: Rubber
7

Glooglitter 12" Inflatable Sewer Test Plug

  • 12-inch size for standard sewer pipes.
  • Includes extension hose for easy access.
  • Made from 4.5mm thick natural rubber.
  • Explosion-proof technology ensures safety during testing.
  • Double pull ring for easy removal.
  • Store in a cool, dry place for longevity.
  • Perfect for sewage inspection and maintenance tasks.
  • Average Rating out of 5:
  • Price Range: $47.99
  • Color: black
  • Material: thickened rubber
8

HeSun 100-Pack 3/4" PEX Expansion Rings

  • 100-pack of durable PEX expansion rings.
  • Certified ASTM F-1960 for safety and reliability.
  • Secure design with stop edge and anti-slip texture.
  • Compatible with all PEX A pipes and fittings.
  • Ideal for various plumbing applications and systems.
  • Withstands pressures up to 160psi and 200℉.
  • Perfect for residential and commercial plumbing tasks.
  • Average Rating out of 5:
  • Price Range: $34.45
  • Size: ‎3/4 INCH,‎0.75 inch
  • Material: Plastic
9

The Hillman Group Neoprene Expansion Plug [2-Pack]

  • High-strength neoprene rubber construction for durability.
  • Secure hold for effective sealing applications.
  • Corrosion resistant steel materials enhance longevity.
  • Available sizes from 1" to 1-7/8".
  • Not for capping food or drinks.
  • Sold in a convenient 2-pack.
  • Ideal for various plumbing and automotive uses.
  • Average Rating out of 5:
  • Price Range: $11.62
  • Color: Black
  • Material: Steel
10

TaiTus Inflatable Sewer Test Plug (6 Inch)

  • Durable natural rubber construction for reliable sealing.
  • Designed for 6-inch round pipe applications.
  • Maximum pressure capability of 2.9 PSI.
  • Easy to navigate difficult pipe openings.
  • Includes galvanized steel chain for secure handling.
  • Wider expansion range than traditional mechanical plugs.
  • Ideal for plumbing tests and inspections.
  • Average Rating out of 5:
  • Price Range: $39.99
  • Color: Black
  • Material: Natural rubber
11

IWISS [F1960] 3/4" Expansion Rings - 25pcs

  • Meets ASTM F1960 standard specifications.
  • Constructed from durable PEX material.
  • Features good shape memory for reliability.
  • Includes stop edge for secure placement.
  • Ensures 1/16-inch overlap on pipe ends.
  • Certified to NSF/ANSI-14 safety standards.
  • Compatible with various PEX systems.
  • Average Rating out of 5:
  • Price Range: $13.59
  • Size: ‎3/4 in.,‎0.75
  • Material: Pex
12

TheClouds 2PCS Rubber Pipe Test Plugs

  • Durable natural rubber for excellent expansion.
  • Maximum inflation pressure of 40 PSI.
  • Size: 1.75 IN diameter, expands to 2.25 IN.
  • Convenient deflation with copper valve core wrench.
  • Secure chain and ring prevent falling into pipes.
  • Ideal for various drain and pipe applications.
  • Easy to use with standard bicycle pump.
  • Average Rating out of 5:
  • Price Range: 0
  • Color: Black
  • Material: Rubber
13

Technical Products No. 7 Winter Plug 1-1/4"

  • Prevents freeze damage in swimming pool pipes.
  • Designed for 1-1/4 inch pipe fittings.
  • Heavy-duty nylon and stainless steel construction.
  • Rubber expansion plugs for a secure fit.
  • Easy installation with large plastic wing-nuts.
  • Non-corrosive materials for long-lasting use.
  • Ideal for winterizing in-ground plumbing systems.
  • Average Rating out of 5:
  • Price Range: $7.83
  • Color: Black
  • Material: Rubber
14

Hillman Neoprene Expansion Plug (1-3/8"-1-1/2")

  • High-strength neoprene rubber construction.
  • Steel components for added durability.
  • Corrosion resistant for long-lasting use.
  • Size range: 1-3/8" to 1-1/2".
  • Secure hold for various applications.
  • Not for food, drink, or medicine use.
  • Easy to install and remove.
  • Average Rating out of 5:
  • Price Range: $13.17
  • Size: ‎1-3/8"
  • Material: Alloy Steel, Neoprene, Rubber
15

OWTWCNL Expandable Rustproof Cleanout Plug

  • Exceptional sealing for leak-free assurance.
  • Made from rustproof stainless steel and nitrile rubber.
  • Versatile for various drain holes and pipe openings.
  • Detachable wrench handle for easy installation.
  • Suitable for home, automotive, and industrial applications.
  • Simple clockwise rotation for secure sealing.
  • Designed for both wet and dry environments.
  • Price Range: $6.99
  • Color: Black
16

Technical Products No. 8 Winter Pipe Plug

  • Prevents freeze damage in plumbing lines.
  • Designed for 1-1/2 inch pipe sizes.
  • Constructed from heavy-duty nylon and rubber.
  • Non-corrosive materials ensure durability.
  • Easy installation with large plastic wing-nuts.
  • Includes stainless steel bolts and washers.
  • Ideal for winterizing swimming pool pipes.
  • Average Rating out of 5:
  • Price Range: $7.43
  • Material: Rubber
17

Supply Giant 3/4" PEX-A End Cap (5 Pack)

  • Securely closes 3/4'' pipeline ends.
  • Ideal for hydronic heating applications.
  • Constructed from durable plastic poly alloy.
  • Lead-free and corrosion-resistant material.
  • Features leak-free Pex-A expansion connection.
  • Specifications: 150 PSI, 210° max temperature.
  • Certifications: ASTM F1960, CSA B137.5 compliant.
  • Average Rating out of 5:
  • Price Range: $6.49
  • Size: ‎0.75 Inch
  • Material: Plastic
18

Shaw Plugs Neoprene Rubber Plug (52007)

  • Durable neoprene rubber construction for longevity.
  • Brass handle for easy operation and grip.
  • Zinc plated steel hardware resists corrosion.
  • Expandable design fits various hole sizes.
  • Ribbed surface enhances grip during installation.
  • Versatile for sealing holes or hanging items.
  • Compact size: 2-1/2" x 2" for convenience.
  • Price Range: $67.10
  • Material: Neoprene Rubber, Brass, Zinc Plated Steel
19

FireHoseDirect Red Plastic FDC Plug

  • Durable 2 1/2" red plastic construction.
  • Male side compatible with NH/NST female fittings.
  • Outside diameter of male threads: 3.06".
  • Includes a plastic chain for easy handling.
  • Ideal for fire protection systems.
  • Lightweight design for easy transportation.
  • Reliable and weather-resistant material choice.
  • Average Rating out of 5:
  • Price Range: $27.32
  • Color: Red
  • Material: Plastic
20

Oatey 2" Cherne Test-Ball Plug

  • Made from high-quality natural rubber material.
  • Excellent expansion and memory for effective sealing.
  • Fits both round and out-of-round pipes easily.
  • Ideal for tight spaces like test tees.
  • Broader expansion range than traditional mechanical plugs.
  • Zinc-plated steel chain prevents slipping during use.
  • Durable design for long-lasting performance and reliability.
  • Average Rating out of 5:
  • Price Range: $29.26
  • Size: ‎2 Inch
  • Material: Rubber
21

GRAINGER APPROVED 8" Single Sphere Expansion Joint

  • Durable neoprene construction for long-lasting performance.
  • 8-inch single sphere design for effective expansion.
  • Max pressure rating of 225 PSI at 72°F.
  • Temperature range from -50°F to 230°F.
  • Vacuum capability up to 26 in Hg at 72°F.
  • Includes 8 bolt holes for easy installation.
  • Overall length of 6 inches for compact fit.
  • Price Range: $478.25
22

JUJINXIN Inflatable Pipe Test Plug (800)

  • High-pressure resistance for reliable pipe testing.
  • Lightweight design, easy to handle and transport.
  • Double-layer material for enhanced durability.
  • Includes essential accessories for convenient use.
  • Suitable for various large sewer pipe applications.
  • Safe operation with pressure gauge monitoring.
  • Prevents leaks with effective sealing technology.
  • Price Range: 0
  • Color: Black
23

Shaw Plugs Expandable Neoprene Rubber Plug

  • Durable neoprene rubber construction for longevity.
  • Expandable design fits various circular openings.
  • Quick installation and removal process.
  • Smooth surface prevents wear and tear.
  • Includes brass cams for secure attachment.
  • Zinc-plated steel hardware resists corrosion.
  • Ideal for low-pressure sealing applications.
  • Average Rating out of 5:
  • Price Range: $28.38
  • Color: Black
  • Material: Neoprene Rubber, Brass, Steel