Snyder Industries 35 Gallon ASTM XLPE Black Double Wall Tank

The Snyder Industries 35 Gallon Double Wall Tank is a black crosslinked polyethylene (XLPE) tank built for secondary containment in a compact 22" x 22" footprint that stands 36" tall. The inner tank holds 35 gallons; the integral outer wall captures any inner-tank leak, so you skip the separate spill berm or basin. At 36" on a 22" square base it tucks into a corner, a curbed equipment pad, or alongside a metering skid where floor space is tight, and it ships LTL from Snyder's Arkansas plant, so set your delivery expectations by origin, not just price.

Will it work for your application?

This is a Snyder XLPE double wall tank with a specific gravity rating of 1.9, meaning it is engineered for liquids substantially heavier than water. On water at 8.34 lb/gal, a full 35 gallons weighs about 292 lb; the tank is rated to carry up to 555 lb of contents, and that gap between 292 lb and 555 lb is exactly what the 1.9 SG rating buys you. If you are storing acids, fertilizers, or other liquids up to 1.9 specific gravity, that rating is the reason to choose this XLPE double wall over a standard water tank. Before you commit, confirm the 36" height clears any shelf, cabinet, or overhead obstruction above your pad, and run the 35 gallon volume and 22" x 22" footprint through the Tank Sizing Calculator and Tank Sizing Guide against your draw rate and space.

Fittings and the real usable volume

Per the technical drawing on this page, the connections are a 6" threaded/vented inlet and a cap with a 4-1/2" access opening. The 6" threaded port needs a matching threaded bulkhead and gasket sized to it, and the 4-1/2" access cap must seat against its gasket to preserve the sealed interstitial annulus between the inner and outer walls. See the technical drawing on this page for fitting locations and the inner/outer wall arrangement before you plumb anything. Note that 35 gallons is nominal capacity: on a containment tank you size for freeboard, so your real working volume sits below the rated number once you account for thermal expansion and headspace. The math is worked out in Snyder Captor double-wall freeboard sizing per ASTM D1998.

The mistake to avoid

The 1.9 SG rating is the contents-density ceiling, not a free pass. Stay at or under 1.9 specific gravity for whatever you store, and govern by the 555 lb contents limit rather than the gallon number alone when your liquid is denser than water. The other common miss on a double wall: the 4-1/2" access cap is your interstitial inspection and inner-tank access point, so keep it reachable, and never plumb a fitting through the outer wall in a way that defeats the containment annulus.

Freight

This tank ships LTL freight from the Snyder plant in Marked Tree, Arkansas, quoted live to your ZIP so you see real cost before you commit. Get an instant number with the Freight Cost Estimator, or call 866-418-1777 and we will quote it from Arkansas to your delivery point and confirm liftgate or limited-access needs. List price is shown before freight; freight is quoted separately to your ZIP.