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What Is A Pillow Tank and Why Do We Need Them?

For those of you who have never heard of Pillow Tank, you are assuredly in good company.  For many folks, hearing the term may generate a few immediate questions.  The first to come to mind might be: What is a Pillow Tank?  What are they for?

So let’s gets started by answering some of the more basic questions.  First, pillow tanks, also referred to as Pillow Bladders, are actually collapsible liquid storage tanks.  Although, they may be referred to by different names across a wide variety of industries, they are utilized for a variety of important purposes and come in a broad range of sizes to meet very specific needs and requirements.  The primary function of collapsible water tanks are to store and dispense not only water, but many other types of hydrocarbons, fuels and chemicals as well.

Portable liquid storage containers serve a critical need across a variety of industrial and agricultural sectors; from basic water collection and storage to large scale fuel, chemical or liquid waste storage.  They have also become a valuable, easily deployable asset for military applications; as well as for state, local and global governmental bodies and emergency management organizations that may need to respond quickly to a broad range of needs, including environmental or weather related disasters.

What materials are pillow tanks made of?  Tanks can be made with many fabrics including mil spec and commercial fabrics that offers ultraviolet light and chemical corrosion protection. Types of fabric may also be utilized for specific applications including XR-5 military spec fabrics, and NSF 61 approved fabrics for the storage of many liquids.

What sizes are available?  And can they be used for residential water storage?

Bladder Tanks come in many sizes for many types of applications, including larger fuel farm applications and small scale fuel bladder tanks for marine applications.  The standard size range is from 50 gallons to 150,000 gallons.  To really understand the size of this, 150,000 gallons is comparable to the amount of water an average size family of four uses in a year.   According to the U.S. Environmental Protection Agency (EPA), “.. the residential water use for a family of four is 400 gallons of water per day. That’s nearly 150,000 gallons per family per year.”

(Tanks shown above are filled with air during testing)

A few basic facts about Residential Pillow Tanks & Water Storage Bladders:

Fact 1 

Collapsible water storage tanks come in a wide variety of sizes.  For residential use, common sizes range from 100, 500, and 1000 gallon bladders and may be used under crawl spaces.

Fact 2  

Where there is a need for water collection and storage, portable, collapsible storage tanks and water bladders are ideal for use as part of a rainwater harvesting or general storage system.

Fact 3

Water bladders, water tanks and pillow tanks are flexible, collapsible and designed for durability and fast deployment.

Interstate Products (IPI) manufactures a wide variety of water bladders for personal water storage, emergency relief situations and industrial or agricultural applications.  Custom sized potable water bladder tanks, chemical tanks, fuel storage tanks; as well as bladders for large frac tank applications.  To learn more about Interstate Product’s extended range marine fuel bladders visit our online store at:

Hard Top Outdoor Drum Storage

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Chemical Storage Guidelines and Regulations

Is your company in compliance with the various Federal regulations and guidelines that govern the way hazardous chemicals must be stored?  In the interest of helping our customers to select the right products to ensure the safe storage and transfer of hazardous chemicals and other flammable or combustible materials, Interstate Products has provided below a summary of information and links to relevant Federal compliance resource publications to help you better understand the basic principles, guidelines and regulatory rules that must be followed.

Many of the regulations and guidelines presented below have been widely adopted by most US states, however, it is also important to learn which state laws apply specifically to your industry, company or particular application.  Our customers are encouraged to seek out the relevant agencies involved in these types of regulations and guidelines in the states in which they operate.

Separation, Isolation and Storage of Hazardous Liquids

The improper storage of corrosives and flammable liquids is the leading cause of spills that can result in damage to facilities and impact worker safety.  One of the most effective practices to help minimize damage from chemical spills is to isolate the various chemical hazards.  Since knowledge of chemical compatibility is critical, it is important to understand that there are two major types of chemical hazards that require their own unique storage and transfer protocols.  The two types of chemicals that pose the greatest risk can be classified as either:

  • Corrosive materials, which include acids and bases
  • Flammable or combustible liquids

Corrosive materials have the potential to severely damage surfaces or other substances it contacts.  Physical hazards to workers include chemical burns, skin or eye damage; and inhalation or ingestion of a corrosive liquid can cause respiratory damage.

Flammable and combustible liquids are defined by their flash points.  A liquid’s flash point is a function of its vapor pressure and boiling point.  Flammable and combustible liquids are classified by the National Fire Protection Association (NFPA) based on their flash points:

Flammable Liquids (Class I):  Liquids with flash points below 100°F (37.8°C) and vapor pressures not exceeding 40 pounds per square inch (absolute) at 100°F (37.8°C).

Combustible Liquids (Classes II and III):  Liquids having flash points at or above 100°F (37.8°C).

The most effective way to isolate your flammable and corrosive hazards is to store them properly in approved safety storage containers and cabinets.  Using the correct flammable storage (gas cans) or chemical storage containers are the first line of defense.  The next step is to utilize the appropriate chemical safety storage cabinets in order to isolate corrosive liquids and flammable liquids from other incompatible chemicals; and to contain the hazards in the event of spill or leakage.

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