Instructions / Assembly

Page 3 of 11 Revised: 2016-05-17
1. Scope
These guidelines cover nonmetallic CLOSED SECONDARY CONTAINMENT TANKS WITH SUPPORT
(CANADA) AND DIKED TANKS WITH SUPPORT (USA) of rectangular shape, with a capacity ranging
from 720 to 1000 Liters (158 Imp. Gal.to 220 Imp. Gal.) (190 USG to 264 USG).
2. General Warnings
Please read and observe these warnings! Failure to comply may void the tank warranty!
• DWOT Oil Storage Tanks must be installed by a licensed installer and the tank(s) must be
installed according to these instructions. Otherwise, the manufacturer’s warranty will be Null and
Void.
• Do not move or alter the installation. The tank is intended for stationary use only.
• The tank shall not be structurally modified.
• Outdoor use requires, for warranty support, the installation of rain cover model DWOT RC
permanently attached to the tank.
• For outdoor use: The tank cover must be secured after each fill or inspection. Do not remove the
cover.
• Do not load, stand on top of the tank or the cover or use the top of the tank or cover to store or
place any items.
• All DWOT tanks are pressure tested at the factory according to UL
®
/ULC Standards and do not
require additional field-testing. If local codes require pressure testing of the piping, it should be
done with the pipes disconnected from the tank. Further information is available in this manual.
• Do not install this tank if there is physical damage, which may affect the integrity of either the
inner tank or outer containment tank. Further information is available in this manual.
• Do not remove the Leak Detector from the tank.
• All tanks must be installed with an approved vent alarm (#DWOT VA) in order to maintain
warranty requirements.
• At least once annually, inspect the tank and the tank system for proper operation, including:
• Blockage of vent by visual check of pipe and cap outside the building;
• Leakage of tank by visual check of the leak detector alarm and pipe and fittings to detect
any oil on their surface;
• Physical damage to the tank or the tank system as described below, or other suspected
damage :
o Any exposure to fire;
o Any cuts or holes in the steel shell;
o Any bending of the connecting pipe;
o Any loosening of the fittings;
o Any dents on the seam of the shell;
o Any bending or leaning of the tank support;
o “Major” dents or scratches in the shell;
o Excessive corrosion of the galvanized steel shell;
o Improper fit of the tank cover (Outdoor Tanks).
CAUTION !
If any of the above or any other hazardous conditions are found, please contact your installer
immediately.