Chem-Tainer 100 Gallon Plastic Portable Utility Tank without Fitting

The Chemtainer 100 Gallon Plastic Portable Utility Tank is a flat-bottom polyethylene tank built for moving and holding up to 100 gallons of water and light-duty liquids on a compact footprint of 42"L x 26"W x 26"H. At 26" tall with a 45 lb empty weight and an 8" lid for filling and access, it drops onto a truck bed, trailer, or shop floor without heavy rigging. This unit ships without a fitting, so you specify and install the outlet and plumbing your job actually needs rather than working around a pre-drilled port. It is molded from FDA-approved polyethylene and carries a 1.5 specific gravity rating.

Does it work for your job

Sizing is where portable utility tanks get people. Full of water, this 100-gallon tank holds roughly 834 lb of contents; add the 45 lb empty tank and you are putting close to 879 lb on whatever surface carries it. Its 1.5 SG rating means it is engineered to hold contents up to about 1,251 lb at full capacity — call it roughly 1,296 lb of total deck load with the tank included — and that headroom is what lets it handle liquids denser than water. Confirm your loaded weight against your vehicle, trailer, or pad rating before you fill; a tank that fits the space can still overload the deck under it. Because it ships without a fitting, plan your bulkhead or outlet location up front — the 8" lid gives you top access, and you drill the discharge to match your pump or gravity-feed setup. Run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide to lock in capacity and loaded weight before you buy.

The mistake to avoid

The 1.5 specific gravity rating is the number to respect here. It tells you the tank is built for liquids up to 1.5 times the weight of water, but it does not clear this tank for chemical service — polyethylene resin compatibility depends on the specific chemical, concentration, and temperature, none of which are covered by an FDA-approved food-grade rating alone. Use this tank for water and light utility duty as specified. If you are hauling anything heavier or reactive, verify the chemistry against the manufacturer's resistance data first and step up to a rated tank if needed. For portable water hauling, fire-fill, and jobsite supply, see the technical drawing on this page for exact dimensions and the lid and wall detail before you set your plumbing.

Freight and ordering

This tank ships LTL freight from Marked Tree, AR, quoted live to your ZIP code — get your exact number from the Freight Cost Estimator or call 866-418-1777. If you are planning a rural water-supply or fire-reserve setup, our guide on fire-water reservoir tank design and the piece on portable utility tank DOT classification for farm fleet use cover the sizing and transport rules that apply to loaf-style and flat-bottom portable tanks. Setting it on a permanent pad? Start with concrete pad sizing for above-ground polyethylene tanks.