Double-Wall Fiberglass Tanks: Monitoring System Configurations Part II
Our fiberglass double-wall tanks are designed to accommodate wet (hydrostatic) or dry leak-monitoring systems.
Wet annular space
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Hydrostatic monitoring system:
- Use antifreeze (brine) solution in cold climates.
- Maximum burial depth from tank top is seven feet below grade.
- Monitoring cavity must be vented to the atmosphere. The optional reservoir sensor includes vent holes to vent the monitoring cavity.
- After installation, set the liquid level in the reservoir so reservoir is half full.
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Dry annular space
Containment Solutions provides a factory-installed "drawstring" at the annular space monitoring fitting, to assist in positioning liquid sensors at the bottom of the annular space. If your tank is ordered with a dry annular space, but fitted with the optional fiberglass reservoir (instead of a monitoring fitting), the drawstring will be positioned within the reservoir.
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Monitoring system with liquid sensor:
Typical configuration for an electronic sensor or manual dipstick.
- Use the standard monitoring fitting.
- Monitoring cavity can be vented or sealed.
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Monitoring system with vacuum and air pressure:
- Use the standard monitoring fitting.
- Maximum continuous positive air pressure is 3 psi.
- Maximum continuous vacuum is 5 psi.
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Monitoring system with gasoline vapor sensor:
Many vapor sensors also include a water sensor.
- Use the standard monitoring fitting.
- Monitoring cavity can be vented or sealed.
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Monitoring Accessories:
Antifreeze mixtures: In areas where ambient temperatures or delivered products may be subjected to freezing conditions, an antifreeze solution must be used with our Hydrostatic Tank Monitor to avoid potential tank damage.
Brine antifreeze solution: Our pre-mixed and blended calcium chloride solution provides your contents freeze protection of up to -40°F. This non-toxic brine antifreeze can be factory-installed into tanks measuring up to 10' diameter and 30,000-gallon capacity. Its color tracer helps detect hidden damage from shipping or jobsite handling.
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