Below are links to various websites and pdf files for Amtrol's Certifications.
Water Systems Council - Well Tanks
UL - Electronic Controls, Expansion Tanks (Fire-X-Trol) and Surge Suppressors (Surge-Trol)
DOT - Well Tanks and Thermal Expansion Tanks
NSF Std 61 - Well Tanks and Thermal Expansion Tanks
NSF Std 58 - Reverse Osmosis Tanks
IAPMO - CA and VT Lead Pumbing Law, Thermal Expansion Tanks and Hot Water Makers
CSA - Hot Water Makers
State of MA - Hot Water Makers, Well Tanks, Thermal Expansion Tanks and Pressurizers
Transport Canada - Cylinders, Well Tanks and Thermal Expansion Tanks
Factory Mutual (FM) Approval - Fire-X-trol
CE Mark - (European Pressure Equipment Directive (PED)
City of Los Angeles - Well Tanks and Thermal Expansion Tanks
ASSE - (American Society of Sanitary Engineering)
National Board Certificate - ASME code vessels
ISO Certificate - Quality Management Certification
ASME Certificates - The American Society of Mechanical Engineers