Water (H2O, CAS 7732-18-5) is a clear, odorless liquid with a specific gravity of 1.00 that freezes at 32°F (0°C). It is stored for process and cooling water, fire protection, rainwater harvesting, irrigation and livestock, construction and dust control. Water storage tanks should be UV-stabilized and opaque to limit algae growth, and properly vented and drained. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
HDPE is the most economical tank material for Water, rated Excellent. Polypropylene, nylon and PVDF (Kynar®) are also rated Good or better.
How Water works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Water works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Water works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
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