Posted by on 5/18/2026 to
Food Vendor FAQ's & Tips
CLASS A CUSTOMS NSF LETTER -- Click to Print or Forward to Health Department
Before you build or modify ----- verify rules and regulations.
Codes vary by local health departments, not state.
We are not aware of the codes or rules. We are not aware of what tanks or items you need.
Codes vary by local health departments, not state.
We are not aware of the codes or rules. We are not aware of what tanks or items you need.
- Ask your local Health Department to provide you with a list of water tank manufacturers that have the NSF logo built into the water tank.
- Forward the documents and tank information provided on the Class A Customs website to your local health department before purchasing to be sure these tanks will pass your local inspection, this is your responsibility.
- Class A Customs NSF Letter this letter has all fresh/gray tank sizes, part #'s, measurements and fittings, along with material tank is made from.
Why is there no NSF logo in the tank?
Can I get an NSF logo on my tank?
Class A Customs was required to remove the NSF logo from all water tanks we manufacture in June 2020, the tanks continue to be made from the same NSF Certified Materials, built in the same way, built on the same machines, and built in the same building here at Class A Customs.
The NSF Company does not allow end users of NSF Certified Materials to use the NSF logo unless each kind of item that is produced has a certification paid for each year. This would mean every style of tank Class A Customs makes, even though they are made using the same NSF Certified Materials and made using the same process, we would need to pay to use the logo on each item, every year at a substantial cost.
All Class A Customs Fresh/Gray Water Tanks are manufactured using
Material is safe for Potable Water Materials – Class A Customs Fresh/Gray tanks are safe to be used for fresh or drinking water storage or gray water storage.
The temperature used during testing is 60 +/- 2°C (140 +/- 4 °F) and appears in Listings as "D. Hot". This is intended to apply to product applications where the product is used for either cold (ambient temperatures) or hot water up to domestic hot temperatures.
Because Class A Customs was verified to use and continues to use NSF Certified Materials to build our tanks,
Class A Customs is allowed to link directly to the NSF Website Materials Page and
Class A Customs is allowed to state the tanks are made from NSF Certified Materials.
The NSF associate Class A Customs was contacted by and worked with was;
Antonio Acree
Quality Representative, Quality & Compliance
NSF International | nsf.org
789 N. Dixboro Road, Ann Arbor, MI, 48105, U.S.A
1-800-NSF-MARK
Your inspector can validate this information with NSF by contacting them directly.
Before you build or modify a unit verify rules and regulations, codes vary by local health departments, not state. We are not aware what tanks or items you will need.
If you have more questions, please feel free to contact us.
You can find more information on the Water Tank Helps Page located on our main site, www.classAcustoms.com
WATER TANK LIST INFORMATION
Measurements are in Inches
Measurements +/- .25” Due to Manufacturing Process
Measurements DO NOT include Fittings or ABS Outlet
1.5" Female NPT Fittings are closed or sealed - fitting is watertight - remove membrane with razor knife to use
.5" Female NPT Fittings are open
Spout -- 1.25" Outer Diameter x 2" Long Boss Fitting (Smooth Pipe / Spout) fitting is open and glue does not stick to pipe, hose with clamp needed
Tanks with SP have the same measurements as main tank, fittings vary.
My health department doesn't care, they won't look... my builders said it is ok... I am just updating tanks.
We hear this and then get the call needing a different tank sent overnight to meet a deadline. It takes very little time to check before and saves you time and money. Forward the documents and tank information provided to your local health department before purchasing to be sure these tanks will pass your local inspection, this is your responsibility.
We hear this and then get the call needing a different tank sent overnight to meet a deadline. It takes very little time to check before and saves you time and money. Forward the documents and tank information provided to your local health department before purchasing to be sure these tanks will pass your local inspection, this is your responsibility.
What does my inspector need when I go to inspections on the tanks?
Class A Customs NSF Letter ( You can print or forward this onto your Health Inspector)
Receipt of Purchase
All tanks have the part number molded into the tank, inspector can verify tank.
Class A Customs NSF Letter ( You can print or forward this onto your Health Inspector)
Receipt of Purchase
All tanks have the part number molded into the tank, inspector can verify tank.
