26BX28 is a 2" NPS low profile pressure/vacuum relief vent. This polypropylene vent provides for both vacuum and pressure relief, allowing high volume air flow from IBC tanks where low pressure relief and vacuum are necessary to protect storage tanks from over pressure. The unique, patented seal allows the tank to maintain a positive pressure below the set pressure, helping to prevent your tank's contents from potential contamination. The vacuum relief feature increases discharge rate and prevents your tanks from deforming under negative tank pressures. The low profile design of this vent helps prevent impact damage when used at your facility. With an O-ring made out of viton, it has a pressure vent PSI of 0.5-5.0 and a vacuum vent PSI of 0.5. These vents also come with hastelloy C hardware for added corrosion resistance. Besides IBC tanks, these vents are suitable for a variety of different applications such as portable chemical storage tanks, large fuel tanks, or any other container in which the internal pressure needs to be controlled.

Key benefits:
  • Provides both vacuum and pressure relief
  • Polypropylene
  • Viton O-ring
  • Hastelloy C Hardware
  • Pressure vent 0.5-5.0 PSI
  • Vacuum vent 0.5 PSI


This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility.

Additional Information

More Information
Country of ManufactureUnited States
Note:Relief Vents that have pressure PSI ranges can be preset to the exact PSI needed but must be requested when ordering or quoted.
Q & A
Customer Questions
Can you ship internationally? Where are you located?
The Cary Company online ordering platform is only set up to ship within the United States. For international shipments, please contact us at 630.629.6600 or Sales@thecarycompany.com, and we will be happy to process your order. Our main warehouse and office are located in Addison, Ill. We also have warehouses in across the United States that you can see here. Thank you for choosing The Cary Company.
What is the purpose of Pressure and Vacuum Relief Vents?
Pressure and Vacuum Relief Vents work with IBC tanks to keep high volume air flowing in areas where low pressure relief and vacuum are necessary to avoid over pressure.
Are Pressure and Vacuum Relief Vents only for IBC Tanks?
No. Pressure and Vacuum Relief Vents work on a variety of containers, including portable chemical storage tanks, large fuel tanks or containers with internal pressure that needs to be controlled.
What are some factors that go into choosing Pressure and Vacuum Relief Vents?
There are a variety of things that go into choosing what Pressure and Vacuum Relief Vent works for your system. It can be vacuum or pressure PSI, material, gaskets and other personal preferences (color, purposes, etc.)
What is a popular material for Pressure and Vacuum Relief Vents?
Stainless Steel 316 is a common choice for Pressure and Vacuum Relief Vents.
What is a 4-in-1 Relief Vent? What is a 5-in-1 Relief Vent?
A 4-in-1 Pressure Relief Vent serves different purposes, including a fill cap, high temperature fusible device, pressure relief vent and as an integral vent guard. A 5-in-1 Pressure/Vacuum Relief Vent has similar purposes, with the addition of vacuum relief.
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