Flexible Rain Water Tanks
Rainwater Storage Tanks From 25 to 210,000 Gallons
Flexible Rainwater Storage Tanks are a unique option for storing and collecting rainwater. Designed to feature a low overall storage height, our collapsible rainwater harvesting tanks can effectively be stored in small areas, such as crawl spaces, basements, or under decks. Pillow Tanks for rainwater offer a great collection system, while keeping stored liquids safe and out of the way. Capacity ranges from 25 to 210,000 gallons depending on your needs and size of your storage area.
Explore financing possibilities for this product; click here to apply for financing!
Questions? We can help! Call our team at +1-863-261-8388 or fill out our quote request form to discuss your requirements.
How Flexible Rainwater Bladder Tanks Work
Standard design of most of our smaller pillow tanks features two standard fittings:
- Bulkhead Fitting located on the top of the tank for fill/discharge
- Bulkhead Fitting located on the side of the tank for fill/discharge
These dual fittings allow the customer to simultaneously attach both a fill and a discharge connection to the tank. For rainwater collection, common layout features a fill hose that stretches from a downspout to a tank fitting. Filters may be added during this process to help eliminate leaves or other large times from the rainwater tank. Connected to the second fitting is a discharge hose and pump. Discharge hoses typically pump water to utilities or other equipment where water is intended to be reused.
Rainwater Bladder Tank Typical Uses
- Supply for Fire Suppression Systems
- Sprinkler System Water Provider
- Backup Water Storage for Wells
- Garden Irrigation
- Stormwater Management
- Cistern
For sizing information view our Small Pillow Tank Sizes or Large Pillow Tank Sizes.
Flexible Rainwater Tank Benefits
- Wide Range of Available Sizes
- Low Profile for Tight Storage Spaces
- Perfect for Under Decks & Basements
- Custom Fittings to Meet Site Requirements
- Drinking Water Compatible Materials Available
- Built to Meet your Site Specifications
- Equipped with UV Resistance for Outdoor Storage
- Barrel Ends Available (Rounded Corner Pillow Tanks)
- Multiple Fitting Options
Collapsible Rainwater Harvesting Tank Applications
There are many different reasons for collecting and storing rainwater. While many people intend to reuse collected water for utilities or sprinkler systems, others have created filtration systems that allow the water to be reused for drinking purposes. For this reason, fabrics used to construct the tanks can be either potable water grade or standard non potable grade. Whether you are looking to store extra water during droughts or reuse rainwater to save in costs, we have a tank that can work for you.
Rainwater Pillow Tank Technical Specifications
Typical design for smaller rainwater tanks will look similar to the 75 gallon model shown on the right. On the top will be the first fitting and on the side above the seam will be the second fitting. If required, alternative fitting sizes and styles can be added to meet specific requirements for your site.
Small Rainwater Storage Tanks
Capacity
(gallons) |
Capacity
(Liters) |
Length |
Width |
Height |
|---|---|---|---|---|
| 25 gallons | 94 liters | 36" (0.9 m) | 24" (0.6 m) | 8" (0.2 m) |
| 50 gallons | 189 liters | 52" (1.3 m) | 36" (0.9 m) | 9" (0.23 m) |
| 75 gallons | 283 liters | 54" (1.37 m) | 42" (1 m) | 9" (0.23 m) |
| 100 gallons | 378 liters | 66" (1.68 m) | 48" (1.2 m) | 9" (0.23 m) |
| 150 gallons | 567 liters | 60" (1.5 m) | 60" (1.5 m) | 12" (0.3 m) |
| 250 gallons | 946 liters | 84" (2.1 m) | 60"(1.5 m) | 14" (0.36 m) |
| 275 gallons | 1,040 liters | 72" (1.8 m) | 80" (2 m) | 16" (0.4 m) |
| 300 gallons | 1,135 liters | 84" (2.1 m) | 66" (1.68 m) | 14" (0.36 m) |
| 500 gallons | 1,892 liters | 108" (2.7 m) | 84" (2.1 m) | 16" (0.4 m) |
| 600 gallons | 2,271 liters | 120" (3 m) | 84" (2.1 m) | 16" (0.4 m) |
| 700 gallons | 2,649 liters | 114" (2.9 m) | 99" (2.5 m) | 16" (0.4 m) |
| 800 gallons | 3,028 liters | 72" (1.8 m) | 120" (3 m) | 24" (0.6 m) |
| 900 gallons | 3,405 liters | 72" (1.8 m) | 132" (3.35 m) | 24" (0.6 m) |
| 1,000 gallons | 3,785 liters | 132" (3.35 m) | 108" (2.74 m) | 16" (0.4 m) |
| 1,500 gallons | 5,678 liters | 168" (4.27 m) | 120" (3 m) | 18" (0.46 m) |
| 2,000 gallons | 7,570 liters | 174" (4.4 m) | 126" (3.2 m) | 22" (0.56 m) |
| 2,500 gallons | 9,463 liters | 174" (4.4 m) | 144" (3.6 m) | 24" (0.6 m) |
| 3,000 gallons | 11,356 liters | 180" (4.57 m) | 162" (4.1 m) | 24" (0.6 m) |
| 4,000 gallons | 15,141 liters | 216" (5.5 m) | 168" (4.27 m) | 27" (0.7 m) |
| 5,000 gallons | 18,927 liters | 234" (5.94 m) | 186" (4.72 m) | 27" (0.7 m) |
Questions? We can help! Call our team at +1-863-261-8388 or fill out our quote request form to discuss your requirements.
Fabric: Fabrics used for rainwater storage tanks can be made with a couple of different fabrics depending on the intended use of the water stored inside the tank. The standard fabrics used are polyurethane, polymer alloy, and
E PVC coated materials. For reuse in spraying, washing, or utilities, a standard water grade fabric will be used. If
you will be using the rainwater for drinking water purposes, tanks will then be built with an NSF 61 and FDA rated
fabric that can safely store potable water.
Contact Time: The contact time for your specific rainwater storage tank can range depending on the material used
for your tank. Contact times can vary between 1 and 7 years. It should be noted, however, that the contact times are not an indication of functionally, but rather a point in time where the fabric on your tank may start to change due to weathering or chemical process. This has no bearing on the longevity of a tank.
Fittings: Standard fittings on the tanks will feature a 2" fill and drain fitting, with options from 3/4" to 3" and 4" to 6" also available.
Optional Fittings
- Ports for Periodic Cleaning and Inspections
- Emergency Plugs
- Repair Kits
- Operational Spare Parts
- Pressure Relief Valves
- Ground Cloth
- Secondary Containment Berm
Packaging: The packaging for these rainwater storage tanks is largely decided based on the intended use and mobility requirements of your tank. We offer a variety of solutions based on your application, including carry bags, totes, wooden treated crates, or as specified (additional costs may apply for unique packaging).
To help ensure the longevity and lifespan of your tank, ground cloths, berms, or rub pads can be placed underneath the tank to add additional abrasion resistance and ground protection.
Read customer inquiries about rainwater storage tanks regarding:
- Water tank stability on sandy soil
- Tank for rainwater storage under a vacation home
- Storing rainwater in a basement
- Rainwater cistern
Questions? We can help! Call our team at +1-863-261-8388 or fill out our quote request form to discuss your requirements.
Large Rain Water Storage Tanks
Capacity
(gallons) |
Capacity
(liters) |
Length |
Width |
Height |
|---|---|---|---|---|
| 5,500 gallons | 20,820 liters | 20' (6.1 m) | 17' (5.2 m) | 2.25' (0.7 m) |
| 6,000 gallons | 22,712 liters | 21' (6.4 m) | 18' (5.5 m) | 2.25' (0.7 m) |
| 6,5000 gallons | 24,605 liters | 20.8' (6.34 m) | 18' (5.5 m) | 2.5' (0.76 m) |
| 7,000 gallons | 26,498 liters | 19' (5.8 m) | 20' (6.1 m) | 2.5' (0.76 m) |
| 7,500 gallons | 28,391 liters | 20' (6.1 m) | 20' (6.1 m) | 2.5' (0.76 m) |
| 8,000 gallons | 30,283 liters | 19' (5.8 m) | 19' (5.8 m) | 3' (0.9 m) |
| 9,000 gallons | 34,069 liters | 20' (6.1 m) | 21' (6.4 m) | 3' (0.9 m) |
| 9,500 gallons | 35,961 liters | 21' (6.4 m) | 21' (6.4 m) | 3' (0.9 m) |
| 10,000 gallons | 37,854 liters | 21' (6.4 m) | 23' (7 m) | 3' (0.9 m) |
| 20,000 gallons | 75,708 liters | 33' (10.1 m) | 25' (7.6 m) | 3.5' (1.07 m) |
| 30,000 gallons | 113,562 liters | 36' (11 m) | 32' (9.75 m) | 3.5' (1.07 m) |
| 40,000 gallons | 151,416 liters | 37' (11.3 m) | 40' (12.2 m) | 4' (1.2 m) |
| 50,000 gallons | 189,271 liters | 42' (12.8 m) | 43' (13.1 m) | 4' (1.2 m) |
| 70,000 gallons | 264,979 liters | 48' (14.6 m) | 42' (12.8 m) | 4' (1.2 m) |
| 80,000 gallons | 302,833 liters | 77' (23.47 m) | 30' (9.1 m) | 5.5' (1.7 m) |
| 106,000 gallons | 401,254 liters | 88' (26.8 m) | 35' (10.7 m) | 5.5' (1.7 m) |
| 125,000 gallons | 473,176 liters | 58' (17.7 m) | 59' (18 m) | 5' (1.5 m) |
| 150,000 gallons | 567,812 liters | 78'(23.77 m) | 58' (17.7 m) | 6' (1.8 m) |
| 210,000 gallons | 794,936 liters | 75' (22.8 m) | 73' (22.25 m) | 6' (1.8 m) |
Have a Cistern Rain Water Storage Tank that is Leaking?
Check out our Cistern Liners. Made from the same reliable fabric as these storage units, liners are available in custom sizes to match these dimensions and storage requirements of your existing tank.
Cistern Liner Advantages:
- Easy to Fold and Ship
- Sized to the Exact Specifications of your Tank
- Designed for the Liquid being Stored in the Tank
We offer several water storage tanks for collecting, harvesting, and storing rainwater. To view more rainwater collection tanks, please check out the Cistern Water Tank Page.
Questions? We can help! Call our team at +1-863-261-8388 or fill out our quote request form to discuss your requirements.