Our tanks are designed to meet National Fire Protection standards (NFPA-22) and NSF/ANSI.STD 61 for the potable water storage option. Our engineering team can provide certified tank and foundation design to meet specific applications and project requirements. The modular design of our water tank enables it to be packaged flat and allows for easy transportation to even difficult or remote areas.
Corrugated Steel Tanks:
Quality Service and Quality Products with the Best Pricing in the Industry
As communities, businesses and industries become increasingly accountable to meet LEED and other environmental requirements that require safe, design-proven storage, RainFlo is on the forefront with innovative answers. When considering the options in customized systems for water storage, facility designers and owners look for a long-term, structurally strong, watertight and cost effective solution. That is exactly what the RainFlo corrugated tank system is.
RainFlo steel water storage tanks use the latest technology and materials utilizing a bolted steel outer shell with a heavy duty liner. These tanks can be assembled at the project site by trained installation professionals or sold as product only, including a very detailed and easy to follow instruction manual. .
Our RainFlo line of field-assembled corrugated steel water tanks are designed to be an aesthetically pleasing and cost effective water storage solution. These versatile tanks have been installed in several different countries in all types of climatic regions, including those that experience dry conditions, snow, earth quake and hurricane activity.
Popular Tank Sizes and Packages:
CUSTOM TANK SIZES ARE AVAILABLE
Click here for more information about RainFlo Corrugated Steel Water Tanks
The RainFlo Advantage:
The watertight and corrosion resistant RainFlo underground fiberglass reinforced plastic storage tanks are designed to withstand the harsh conditions of rainharvesting and stormwater management applications. The storage tanks are available in 4’-12’ diameters with capacities up to 50,000 gallons. Unlike concrete, fiberglass is lightweight and extremely strong, allowing/enabling us to provide prepackaged systems from a quality-controlled manufacturing facility. Prepackaging also limits the labor cost and confined space entry risk in the field. The result is finished products that are unmatched in quality, fit, and performance and allow for cost effective delivery methods.
Above Ground Plastic Tanks:
The above ground storage tank is available in an assortment of colors to blend with the environment, provide additional protection from UV rays and reduce algae growth.
Typical Above Ground Plastic Tank Features:
- ANSI/NSF 61 Compliant
- Manufactured with food-grade FDA approved virgin polyester resin in NSF certified plants
- Storage tanks are seamless with one piece construction
- Strong, durable construction
- Hard-plumbing of plastic tank is not recommended due to the expansive/contractive characteristics of polyethylene; use elbows to allow flex
- A concrete pad is recommended for installation, however, tanks may be placed on any flat level "compacted" surface
- Designed for containment of water (8 lbs/gallon)
- FDA approved High Density Linear Polyethylene (ANSI/NSF Standard 61)
- Containers are impact and corrosion resistant
- Tanks come standard with a filler fitting and a drain with plug
- Inlet installed high near manway
- Drain installed at bottom under manway
- Ship from various locations in the USA
The main associations for codes and standards are the National Fire Protection Association (NFPA) and the National Fire Sprinkler Association (NFSA).
NFPA develops, publishes, and disseminates more than 300 consensus codes and standards intended to minimize the possibility and effects of fire and other risks. NFPA membership totals more than 70,000 individuals around the world. NFPA makes its codes and standards available online to the public for free. Most codes and standards for fire protection systems are developed and published by the NFPA.
NFSA is focused on fire sprinkler systems. Their mission statement is "To protect lives and property from fire through widespread acceptance of the fire sprinkler concept".
About NFPA 22:
NFPA 22 is titled the "Standard for Water Tanks for Private Fire Protection"
While strict interpretation of NFPA 22 Section 4.4.1 does not authorize the use of polyethylene (plastic) water tanks or corrugated steel tanks with removable plastic liners, many jurisdictions readily permit the use of plastic tanks because the alternatives are cost prohibitive. One important note regarding corrugated steel tanks with plastic (PVC or EPDM) liners is the concern that the liner could be sucked into the intake and block the flow of water. Precautions such as the use of a Tee connector or similar means to provide an alternate intake should be implemented.
According to the NFPA Technical Advisor board, this standard is specifically written to cover technical details which apply to fire suppression systems which employ fire suppression sprinklers. Water tanks used for drafting (water drawn into a fire truck) do not fall under the scope of NPFA 22. Under some circumstances, NFPA 1142 Annex-B can be referenced for underground cistern applications.
About NFPA 13:
NFPA 13 is titled the "Standard for the Installation of Sprinkler Systems"
NFPA 13D is titled the "Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes". According to NFPA, there are no specific criteria for water tanks (materials or structural).
NFPA 13-R is titled the "Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies" and it applies to residential homes up to 4 stories.
NFPA Standards for Above Ground Water Tanks Used for Drafting Purposes:
According to the NFPA Technical Advisory board, there is no standard which applies to the materials or construction of above ground water tanks which are used for drafting purposes (Case# 31873) 5/13/14.
Drafting Connection (FDC) Standards:
The connection to a water tank for residential fire protection is specifically called a drafting connection and is also referred to as a Fire Department Connection or FDC. This is the most important part of the system to get right because the fire department needs to be able to connect to your water source in order to use it. The connection typically consists of a 4” pipe system from the tank with a shutoff (Gate) valve and a suitable connection for the local fire department. You should contact your local fire department to get the specifications for their drafting connection. One typical connection is called National Hose Thread and is abbreviated by NH or NST. Various sizes are available but 4-1/2" NH/NST and 2-1/2" NH/NST are very common. This is a threaded male connector. A matching plastic or brass cap with chain is typically required as well.
A dual-service tank is a tank which is used for both fire protection and is also used for other purposes. The main goal of a dual-use system is to make sure the tank always has an adequate supply to fight a fire, regardless of usage for other purposes. The way this is typically achieved is by using separate plumbing systems for fire protection and for residential use and insuring that the plumbing pipe for residential use does not extend below the water elevation which is necessary for fire protection. The NFPA 22 standard also specifies that separate plumbing systems be used and specifies the same requirement for keeping the plumbing for other purposes above the elevation for fire protection.
Fire Sprinkler Water Quality:
NFPA 13 applies to rainwater collected for fire sprinkler systems. NFPA 13 requires that in the Owner's Certificate (Section 4.3(3)), the owner of the building shall be aware of any special conditions in the water supply that may be responsible for corrosive conditions. This would require an evaluation of the water by Section 24.1.5 of NFPA 13. Water that may have fertilizers or other chemicals could contain an additive (Section 4.4) that can be very corrosive or detrimental to the system.
Below is a list of sections from NFPA 13 that may apply to rainwater if used for sprinkler systems:
• 4.3(3) Owner Certificate
• 4.4 Additives
• 24.1.5 Water Supply Treatment
• 188.8.131.52 Water Supply Evaluation
• 184.108.40.206 Biocides
• 24.2.1 Water Supplies
While a thorough reading of these sections is recommended, it can be summarized as: the water source and quality has to be evaluated prior to implementation and must be consistent. If necessary, NFPA and/or NFSA should be consulted for technical assistance.
For NFPA Members, technical support can be reached at:
• NFPA Technical Advisory: 800-344-3555 Option-3
Information About Our Types of NFPA Solutions: