The Snyder Industries 4650 Gallon Vertical Liquid Storage Tank is a white, high-density linear polyethylene vertical tank built for large-volume water and liquid storage where footprint and full-fill weight both matter. It stands 154 inches tall on a 102 x 102 inch footprint and carries a 1.5 specific gravity rating, so it has the wall structure to handle dense liquids well past the weight of plain water. The tank is built to ASTM D1998, the standard that governs cross-laminated and molded polyethylene wall thickness for this size class. If you are scoping a vertical storage tank in this size class, the numbers below answer the three questions that decide the job: will it hold what you need, what does it weigh loaded, and how does it ship.
Will this tank do the job
At 4650 gallons of nominal capacity, full of water this tank carries roughly 38,781 pounds of contents, and at its 1.5 specific gravity rating it is engineered for a maximum rated contents weight of 58,172 pounds. That spread is the differentiator: the headroom between the water weight and the rated weight means this tank handles liquids up to roughly 50 percent denser than water, so brine, light chemicals, and dense process fluids that would overload a 1.0 to 1.35 SG water tank fall inside the rated band. Plain water and light liquids sit at the low end. The molded HDLPE wall is structured to ASTM D1998 for that load, which is why this tank suits more than basic water holding. Pair these numbers with the Tank Sizing Calculator and the Tank Sizing Guide to confirm the gallons against your actual draw and refill cycle before you commit.
Fittings, access, and venting
This tank is plumbed for real installation work, not just a single bulkhead. The fitting package includes a flange, a 12 inch x 13.75 inch S.U.M.O. flat fitting, an 18 inch PE threaded and vented fitting, additional S.U.M.O. and S.U.M.O. flat fittings, and a manway with 15 inch access. That 15 inch manway gives you man-rated entry for internal inspection and cleanout, and the 18 inch vented fitting provides atmospheric venting so the tank does not pull a vacuum on fast draw-down or pressurize on fast fill. Keep that vent unobstructed and matched to your fill and draw rate, or a tank this size can collapse or balloon. One detail people miss: the gaskets and o-rings on the flanged and bulkhead fittings must be chemically compatible with the fluid you store, because the seals, not the polyethylene, are usually the first thing to fail on a dense-liquid service. Exact fitting positions, elevations, and orientation are shown on the technical drawing on this page, so review it against your plumbing layout and your concrete pad location before ordering.
The mistake to avoid
The number that trips people up here is the foundation, not the tank. A fully loaded tank concentrates up to 58,172 pounds onto a 102 x 102 inch footprint, about 72 square feet, and an undersized or under-engineered pad is the most common and most expensive error in this size class. Read our guides on concrete pad sizing for above-ground polyethylene tanks and on HDPE tank wall thickness and ASTM D1998 sizing logic before the slab is poured. If this is destined for fire-water reserve or rural standby supply, our guide on fire-water reservoir tank design covers NFPA 22 sizing and cold-climate freeze protection.
This vertical storage tank ships LTL freight from the Snyder plant in Marked Tree, Arkansas, and freight is quoted live to your ZIP because a tank this size moves as a single large unit. Get your number in seconds with our Freight Cost Estimator, or call 866-418-1777 and we will work the route and delivery details with you.
