Bladders | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Diameter Diameter

2 1/2"

129 Products

Pressure and Vacuum Monitoring and Control

Air-Inflatable Plugs

Also known as pneumatic plugs, these plugs conform to wide and out-of-round pipes.

Air- and Water-Inflatable Plugs

Penetrate tight pipe junctures with the most flexible expansion plugs we offer.

Air- and Water-Inflatable Plugs for Y-Joints

These extra-long plugs allow you to seal off two pipes at the same time. They have two separate inflation chambers to release back pressure gradually and prevent splash back as water clears the drain line.

Air-Inflatable Plugs with Bypass

Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve back pressure while testing.

Expansion Tanks for Drinking Water

These tanks meet NSF/ANSI Standard 61 for use with drinking (potable) water.

Expansion Tanks for Lubricants

A rolling rubber diaphragm maintains tank pressure at or near 0 psi, which extends seal life to help keep lubricants clean.

Expansion Tanks for Water

Use these tanks to accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems.

ASME-Code Expansion Tanks for Water

Manufactured in accordance with ASME codes.

Inflatable Wedges

Insert into a tight space and then squeeze the pump to inflate and pry objects apart.

Bladder-Style Hydraulic Accumulators

Charge these accumulators to the pressure you need.

Charged Bladder-Style Hydraulic Accumulators

These accumulators come with a charge of nitrogen and are ready to use.

Material Handling

Air-Powered Lifting Bags

Use these rugged rubber lifting bags under heavy loads with less than 1" of clearance, on soft surfaces, and under water.

Void-Fill Air Bags

These inflatable paper bags prevent tipping and provide a cushion between products to reduce damage during transit.

Sorbents and Spill Control

Water-Activated Flood Barriers

No more filling and carrying heavy sandbags—just add water to these flat, lightweight barriers, and they expand to block flooding.

Water-Activated Spill-Control Dikes

These dikes lay flat until they absorb water, then swell to form barriers.

CamelBak Water Backpacks

Stay hydrated while working outdoors and in other high-heat environments.