Accessories: Fiberglass Secondary Containment Collar
An optional secondary containment collar provides a containment area for spilled liquids, as well as a location for the leak-monitoring sensor.
Installation: Collars can be installed around other tank fittings and accessories, where space permits. Collars are constructed of fiberglass and are available in 42" diameter (with 22" manways) and 48" diameter (with 22" and 30" manways).
The secondary containment collar is integrally attached to the tank top to provide a watertight seal. The collar is factory installed and tested prior to shipment. Another collar leak test should be performed at the jobsite by the installing contractor. See Containment Solutions’ installation instructions for details.
Leak testing: The secondary containment collar must periodically be tested for leaks — at least once each year or after collar maintenance is performed — by adding water to the collar above the tank top. The secondary containment collar must be continuously monitored with an electronic sensor for potential spills or piping leaks.
Secondary containment fitting:
A 6" FRP threaded secondary coupling is concentrically positioned around
the 4" NPT primary tank fitting. The secondary containment coupling is surface-mounted onto the tank and does not penetrate the outer wall. To directly monitor the cavity between the primary and secondary pipe, a fitting with an access port should be installed.
