Norwesco 20 Gallon Plastic Applicator Saddle Tank in White

The Norwesco 20 Gallon Applicator Saddle Tank (SKU N-61737) is a white polyethylene saddle tank built to ride the frame of a spreader, ATV, or utility trailer and put liquid where the field needs it.It holds 20 gallons, weighs 16 lb empty, and measures 31" long by 15" wide by 18" high with a 15" footprint diameter.A 5" fill lid sits on top and a 0.75" outlet feeds your plumbing.The resin is FDA-approved polyethylene rated to a 1.5 specific gravity, with a maximum service temperature of 120 F (48 C).One honest note up front for anyone running corrosives: the resin is listed as HDLPE with a question mark, so confirm HDLPE versus XLPE with us before you commit to a chemical service.If you are shopping for a 20 gallon Norwesco applicator or saddle tank, this is that tank.

Will it work for your load?

Match the tank to the weight of what you pour in, not just the volume.Filled with water this tank carries about 167 lb, and its 1.5 SG rating supports contents up to roughly 250 lb before you are asking more of the wall than it was built for.That headroom is what lets it handle heavier ag chemistries, but it is a ceiling, not an invitation, so check your product's density first.Run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide before you commit to a fill volume.Because a saddle tank straddles a frame, confirm the 15" width and 31" length clear your mounting rails and that the saddle seats without rocking.See the technical drawing on this page for the fill, outlet, and footprint layout.

Chemical compatibility

This is a polyethylene tank (resin listed as HDLPE?) rated to a 1.5 specific gravity, so confirm HDLPE versus XLPE with us before any corrosive service.Per the Snyder Industries OEM chemical-resistance chart — every rating concentration- and temperature-specific and held under this tank's 120 F (48 C) ceiling — this tank suits several field chemistries when you specify the right fittings and gaskets: acetic acid (60%, PP/PVC fittings, EPDM gaskets), aluminum sulfate (50%, PVC/EPDM), calcium chloride (40%, PVC/EPDM), DEF (32.5%, 316 stainless fittings, EPDM), ferrous sulfate (20%, PVC/EPDM), magnesium chloride (30%, PVC/EPDM), sodium carbonate (30%, PVC/EPDM), urea solution (50%, PP/PVC/EPDM), and ozonated water (up to 10 PPM, PVC/EPDM).Verify your exact chemical, concentration, temperature, and fitting plus gasket material against the chart before you fill.

Several chemistries you might expect to run here exceed a 1.5 SG tank and need a higher-SG (1.9) tank instead — and note how the fitting metallurgy steps up with them: sulfuric acid (98%, CPVC/Viton), hydrochloric acid (37%, PVC/Viton), sodium hypochlorite (under 16.5%, PVC/Viton), hydrogen peroxide (50%, PVC/Viton), phosphoric acid (85%, PVC/Viton), ferric chloride (50%, PVC/EPDM), and ethylene glycol (100%, PVC/EPDM).If your load is on that list, shop the 1.9-SG tanks through our chemical compatibility hub rather than forcing this one.

The mistake to avoid

The costliest error on an applicator tank is fitting metallurgy.This tank shares a single 0.75" outlet and 5" lid across every service, but the gasket and fitting material change with the chemical — EPDM for the salts and urea, and 316 stainless for DEF specifically (DEF is the one "compatible" chemistry here that will not accept PVC or PP, and it only needs a 1.5 SG, so this 1.5-rated tank is over-built for it).Bolting a generic fitting onto a corrosive load is how a good tank leaks in a season.If you are running fertilizer or non-roadable trailer duty, our guides on Norwesco applicator and leg tanks for fertilizer and fertilizer-blend tank stratification cover the regulatory scope and the mixing physics that keep a blend on spec.

This tank ships LTL, freight quoted live to your ZIP from the nearest Norwesco plant — Hanford, CA; Sheldon, IA; or Tooele, UT.Get a real number with our Freight Cost Estimator or call 866-418-1777 to lock in fittings and freight together.