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 | Relative cost | Rating |
|---|---|---|
| HDPE $ | $$$$ | A Excellent |
| Polypropylene $$ | $$$$ | A Excellent |
| Nylon $$$ | $$$$ | A Excellent |
| PVDF (Kynar®) $$$$ | $$$$ | A Excellent |
How Water works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | A Excellent |
| PVC | A Excellent |
| CPVC | A Excellent |
| Polypropylene | A Excellent |
| PVDF | A Excellent |
How Water works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | A Excellent |
| EPDM | A Excellent |
| Viton® | A Excellent |
How Water works with the metals used for fittings and bolts.
| Material | Rating |
|---|---|
| 316 Stainless Steel | A Excellent |
| Hastelloy | A Excellent |
| Titanium | — No Data |
| Aluminum | A Excellent |
Storing this chemical in PVDF?
PVDF tanks from 25 to 5,000 gallons with fittings installed. Confirm concentration and temperature with us before you order.
Send the chemical, concentration, temperature and size. We’ll match the tank and fittings and send a quote.