Cone Bottom Tank Stand Compatibility Matrix: Norwesco, Snyder, and Enduraplas

Cone-bottom storage tanks don't sit on the floor. The whole point of the cone bottom is to fully drain the tank from a center-bottom outlet, which means the tank has to be elevated above the floor by a stand or a pit. The stand is not optional, and the wrong stand will void the manufacturer's warranty, distort the tank cone, and in the worst case fail under load and dump the contents of the tank across the facility.

Choosing the stand is more error-prone than buying the tank itself. Tank manufacturers (Norwesco, Snyder Industries, Enduraplas) all build proprietary stands sized to specific tank diameters and capacities. The stands are not universal. A Norwesco 1000-gallon cone-bottom stand will not properly support a Snyder 1000-gallon cone-bottom tank because the diameters and the cone angles are different. This guide cross-references the available stands at OneSource Plastics with the cone-bottom tanks they're designed to support, so you order the matched pair, not a guess.

Why Cone-Bottom Tanks Need Specifically Matched Stands

Three load-path issues drive the matched-pair requirement.

Cone angle alignment

Cone bottoms come in three common angles: 15-degree, 20-degree, and 30-degree. The 15-degree cone is the shallowest, used for general-purpose mixing applications. The 30-degree cone is the steepest, used for full-drain service with viscous or settling-prone fluids. The stand cradles the cone, so the cradle angle in the stand must match the cone angle on the tank. A 30-degree cone tank seated in a 15-degree stand has a 15-degree gap at the bottom, with all the load concentrated at the upper rim of the cone. The cone deforms within months under continuous fluid load, and the tank starts to leak at the cone-to-sidewall weld line.

Diameter match

The stand cradle must match the tank's outer diameter at the cone-to-sidewall transition. A 48-inch tank in a 36-inch stand bridges across the stand opening with all the load on the cone-to-sidewall transition (the highest-stress point on the tank). A 36-inch tank in a 48-inch stand drops through the opening or rests on a fitting. Both are unacceptable.

Capacity-rated load support

A 5,500-gallon cone-bottom tank full of brine at SG 1.2 weighs 55,000 pounds plus tank weight. The stand must be rated for that static load plus a margin for filling/draining cycles. Stands rated for smaller tanks lack the steel and welds to hold the larger capacity.

The Norwesco Cone-Bottom Stand Lineup

Norwesco builds a steel-frame stand series sized by the tank capacity it supports. The MPN naming is descriptive (the stand for a 300-gallon tank includes "300" in the name; the stand for a 7500/10000-gallon tank includes those capacities). All Norwesco stands are powder-coated steel.

Stand MPN	Tank Capacity Supported	List Price
N-41477	Small Stand, 15-degree (matches 75-150 gallon Norwesco 15-degree cone tanks)	$509.99
N-63932	160 Gallon Cone Bottom Stand	$559.99
N-41493	Large Stand, 45-degree (matches 250-500 gallon Norwesco 45-degree cone tanks)	$759.99
N-63933	300/500 Gallon Cone Bottom Stand	$819.99
N-63934	1000/1500 Gallon Cone Bottom Stand	$1,379.14
N-64076	2500/3000 Gallon Cone Bottom Stand (2014+ style)	$2,739.99
N-60059	2500/3000 Gallon Cone Bottom Stand (legacy)	$4,037.50
N-60358	5500 Gallon Cone Bottom Stand	$7,279.99
N-64070	7500/10000 Gallon Cone Bottom Stand (2014+ style)	$7,279.99
N-61860	7500/10000 Gallon Cone Bottom Stand (pre-2014)	$11,269.85
N-64113	10000 Gallon Stand (replacement-fit)	$7,658.33

Important note on the 2014 style change: Norwesco redesigned the 2,500/3,000 gallon and 7,500/10,000 gallon stand families in 2014. Tanks built before 2014 use the legacy stand (N-60059 for 2500/3000, N-61860 for 7500/10000). Tanks built 2014 or later use the new style (N-64076 for 2500/3000, N-64070 for 7500/10000). The two are not interchangeable. If you're replacing a stand on an older tank, verify the production year of your tank against the stand SKU before order. The replacement-fit N-64113 is designed to retrofit some 10,000-gallon tanks but check tank serial number with us before ordering.

The Snyder Industries Cone-Bottom Stand Lineup

Snyder uses an N97601 / N97802 / N99901 SKU family for stands. The N97601 family is the standard cone-bottom stand series, sized by tank diameter rather than capacity (a 30-inch tank uses the 30-inch stand regardless of whether the tank is 65 gallon or 110 gallon). The N97802 family is for the smaller cone-bottom Snyder cone-bottom tanks (35 to 335 gallon). Snyder also produces specialty stands for chemical-feed and seismic applications.

Stand MPN	Description	Tank Diameter	List Price
SII-48600	35, 65, or 110 Gallon Stand	17 to 30″	$340.00
SII-1003700N97802	Poly Stand for 65 & 125 Gallon	N/A (poly cradle)	$402.00
SII-1370000N97601	22″ diameter stand — 12″ clearance	22″	$575.57
SII-1004000N97802	Poly Stand for 225 Gallon	N/A (poly cradle)	$625.00
SII-1370001N97601	22″ diameter stand — 18″ clearance	22″	$666.37
SII-1004200N97802	Poly Stand for 335 Gallon	N/A (poly cradle)	$675.00
SII-1690001N97601	30″ diameter stand — 18″ clearance	30″	$996.70
SII-1750000N97601	42″ diameter stand — 12″ clearance	42″	$1,219.78
SII-1760000N97601	48″ diameter stand — 12″ clearance	48″	$1,613.00
SII-1760001N97601	48″ diameter stand — 18″ clearance	48″	$1,854.00
SII-78800000	Cone Bottom Stand (large)	Per spec	$1,900.79
SII-6280000B99901	Stand only — no wrap	Per spec	$1,937.14
SII-79000	Cone Bottom Stand (extra-large)	Per spec	$3,323.00
SII-79800000	Seismic stand for 3900-4400 Gallon Cone Bottom	Per spec	$5,892.99

"12-inch clearance" vs "18-inch clearance": The clearance specification is the height of the cone outlet above the finished floor when the tank is mounted in the stand. 12-inch clearance is the standard for typical drain plumbing (a 90-degree elbow plus a 2-inch ball valve fits). 18-inch clearance gives room for a larger valve, a Y-strainer, a sample port, or a containment basin under the outlet. Choose the clearance based on the plumbing under the cone. You can't change the stand later without dismounting the tank.

The Enduraplas Approach: Integrated Stands

Enduraplas takes a different design philosophy. Most of their cone-bottom tanks ship as integrated tank+stand assemblies rather than separate components. The THM060KWH01 (60-gallon cone-bottom at $648, 30-inch diameter, 45-inch overall height) is a one-piece poly tank with a poly stand structure molded as part of the tank assembly. Larger Enduraplas cone-bottom assemblies follow the same integrated-stand pattern.

The trade-off is reduced spec flexibility (you can't change the clearance, the stand color, or the stand finish independently) in exchange for a single-SKU order, faster lead times, and lower freight cost (one assembly ships instead of two). For sub-1000-gallon Enduraplas cone-bottom service the integrated approach simplifies the order process and there is no separate stand SKU to specify.

Tank-to-Stand Compatibility Matrix

Cross-referencing the actual tank lineup with the stand lineup, here's the matched-pair table for the most common cone-bottom orders:

Capacity	Cone Tank MPN	Matched Stand MPN	Combined List
175 gal Norwesco 30-deg	N-60113 (49″ dia, 49″ H)	Ships as integrated tank+stand	See product page
300 gal Norwesco 30-deg	N-62343 / N-43730 (49″ dia)	N-63933 (300/500)	Tank + $819.99 stand
310 gal Norwesco 30-deg	N-62441 (43″ dia, 72″ H)	N-63933 (300/500)	Tank + $819.99 stand
500 gal Norwesco 30-deg	N-40289 (49″ dia, 87″ H)	N-63933 (300/500)	Tank + $819.99 stand
550 gal Norwesco 20-deg	N-44649 (73″ dia, 58″ H)	N-63934 (1000/1500)	Tank + $1,379.14 stand
750 gal Norwesco 20-deg	N-40809 (73″ dia, 67″ H)	N-63934 (1000/1500)	Tank + $1,379.14 stand
1050 gal Norwesco 20-deg	N-40359 (73″ dia, 86″ H)	N-63934 (1000/1500)	Tank + $1,379.14 stand
1600 gal Norwesco 30-deg	N-40813 / N-40815 (89″ dia)	N-63934 (1000/1500)	Tank + $1,379.14 stand
2500 gal Norwesco 30-deg	N-40672 / N-40674 / N-42025 (99″ dia)	N-64076 (2500/3000) for 2014+	Tank + $2,739.99 stand
3000 gal Norwesco 30-deg	N-44951 / N-40799 (96″ dia)	N-64076 (2500/3000) for 2014+	Tank + $2,739.99 stand
3000 gal Snyder cone-bottom	SII-8360037 (95″ dia, 135″ H, ships with poly stand)	Integrated	Per Snyder spec sheet
5500 gal Norwesco	Norwesco 5500-gal cone-bottom	N-60358 (5500-gallon)	Tank + $7,279.99 stand
7500 gal Norwesco	Norwesco 7500-gal cone-bottom	N-64070 (7500/10000) for 2014+	Tank + $7,279.99 stand
10000 gal Norwesco	Norwesco 10000-gal cone-bottom	N-64070 (2014+) or N-64113 (replacement-fit)	Tank + $7,279.99 to $7,658.33 stand

The Snyder Cone-Bottom Stand Pairings

Snyder's cone-bottom small-tank lineup (the 32101, 32419, 1520000, 1850000, 1560000, 1580000, 6070000 series in the 15 to 150 gallon range) generally uses the SII-48600 stand ($340) for the 35 to 110 gallon range, then steps up to the 22-inch or 30-inch diameter stands for the larger units. For tank-specific stand selection, here is the pairing matrix:

Snyder Cone Tank	Tank Diameter	Matched Stand
15 gal SII-1520000N51	17″	SII-48600 (covers 35/65/110)
17 gal SII-1850000N51	19″	SII-48600
30 gal SII-32223 / 32223B	27″	SII-48600
35 gal SII-1580000N51	30″	SII-48600 or SII-1690001N97601 (30″ stand, 18″ clearance)
60 gal SII-32419 / 32419B	30″	SII-48600 or SII-1690001N97601
65 gal SII-1560000N51	30″	SII-1690001N97601 (30″ stand)
110 gal SII-6070000N51	30″	SII-1690001N97601 (30″ stand)
150 gal SII-32101 / 32101B	36″	Per Snyder spec sheet (verify with us)

Cross-Brand Substitution: Why You Can't (and What to Do About It)

The most common failed substitution attempt: a buyer with an existing Norwesco cone-bottom stand decides to replace the tank with a Snyder unit. The new tank arrives. It doesn't fit. The cone diameter is different, the cone angle is different, or both.

The underlying reason is that each manufacturer designs their tanks to match their own stand catalog. Norwesco 30-degree cones are dimensioned for Norwesco stands. Snyder cones are dimensioned for Snyder stands. There is no industry-standard cone profile.

If you're switching brands, you typically need to also switch the stand. The exception is if you're upgrading from poly stand to a custom-fabricated steel stand sized to your specific tank. Custom steel stands are an option for high-value installs (chemical plants, food-grade facilities with USDA inspection requirements) but not cost-justified for most installations.

Specialty: Chemical Feed Station Tanks With Integrated Stand

Snyder builds a Chemical Feed Station (CFWS) line that's a tank+stand+containment-vessel assembly designed for indoor chemical metering applications. These are pre-engineered packages where the stand, the secondary containment, and the tank are matched at the factory. Examples:

• SII-1000124CFWS-42 — 35 gallon XLPE Chemical Feed Station Tank with Stand. List $52 base.
• SII-1000124CFWS45 — 35 gallon HDLPE version with stand.
• SII-5680024CFWS45 — 60 gallon HDLPE Chemical Feed Station with stand in white.
• SII-5720104CFWS45 — 200 gallon HDLPE version, 74-inch overall.
• SII-5740104CFWS-42 — 275 gallon XLPE version, 76-inch overall.
• SII-5750104CFWS30 — 330 gallon HDLPE Chemical Feed Station for sulfuric acid with containment basin, 86-inch overall.
• SII-5770104CFWS42 — 440 gallon XLPE Chemical Feed Station with stand, 88-inch overall.

For chemical metering applications (sulfuric acid feed in cooling towers, sodium hypochlorite feed in water treatment, ferric chloride feed in wastewater), these integrated assemblies are the right choice. They eliminate the stand-compatibility question and ship as a single SKU.

Stand Material: Steel vs Poly

Norwesco stands are powder-coated steel. Snyder stands are available in both steel and structural-poly variants (the N97802 family is poly, the N97601 family is steel). Enduraplas integrated stands are poly.

Steel stands are stronger per pound and cheaper per gallon supported. Poly stands are corrosion-immune (no rust where chemistry splashes hit them) and easier to clean. For chemistry installations where leaks and splashes are routine, the poly stand is the better long-term choice. For water and brine, the steel stand is fine and costs less. For outdoor unprotected installation, the steel stand needs periodic touch-up of the powder coat where the surface gets nicked; the poly stand needs nothing.

Common Stand Specification Mistakes

Mistake 1: Ordering a stand for the wrong cone angle

Norwesco's most common cone angles are 15-degree (for general-purpose mixing) and 30-degree (for full-drain). Stands are angle-specific. The N-41477 small stand is 15-degree only. The N-41493 large stand is 45-degree. A 30-degree cone tank in a 45-degree stand has a cone-to-stand mismatch that distorts the cone over time. Always verify the cone angle on the tank matches the stand.

Mistake 2: Swapping a 2014+ stand onto a pre-2014 tank or vice versa

The Norwesco 2014 stand redesign changed the cradle profile and the leg geometry. The new stand will not properly cradle the old tank, and the old stand will not properly cradle the new tank. Always verify production year of the tank before order.

Mistake 3: Forgetting the cone outlet plumbing fits in the stand clearance

The 12-inch clearance Snyder stands assume a 2-inch ball valve at the outlet. If your install has a 3-inch valve, a Y-strainer, or a containment basin under the outlet, you need the 18-inch clearance variant. Order the stand to fit the plumbing, not just the tank.

Mistake 4: Mixing brands in the matched pair

A Snyder tank in a Norwesco stand or vice versa is a misfit. Don't try to save money by reusing an existing stand from a different brand. The cone profiles are different, the diameters are different, and the load paths don't match.

Mistake 5: Not considering seismic anchoring

For tanks larger than 1,000 gallons in seismic zones (California, Pacific Northwest, parts of Alaska, Puerto Rico), the stand needs to be anchored to a concrete pad sized for the seismic load. Snyder's SII-79800000 seismic stand for 3900-4400 gallon cone-bottom tanks is engineered for this; a standard stand is not. See California Building Code Chapter 16 for seismic load requirements applicable to liquid-storage tanks.

Internal Resources

• Cone Bottom Tanks Category — full cone-bottom catalog
• Tank Accessories — stands, valves, fittings
• Chemical Storage Tanks
• Brand Comparison: 2000-Gallon Verticals
• Freight Cost Estimator

Order Process

Send the tank MPN you have (or want) and the cone outlet plumbing diagram to sales@onesourceplastics.com or call 866-418-1777. We'll verify the stand compatibility, confirm the cone angle and clearance, and quote the matched pair plus freight. For pre-2014 Norwesco tanks bring us the production-year stamp from the nameplate so we order the right legacy stand.

Source Citations

• Norwesco cone-bottom tank and stand specification sheets
• Snyder Industries cone-bottom and chemical-feed-station product literature
• Enduraplas integrated cone-bottom assembly catalog
• OneSource Plastics master catalog data, 2026-03-26 snapshot
• California Building Code Chapter 16 (seismic load requirements)
• ASTM D1998 — Standard Specification for Polyethylene Upright Storage Tanks