PREMIER PLASTICS low profile
“Loaf” style low profile below ground tanks (maximum backfill cover depth – 4′). The unique Triangular Ribs provide unparalleled ability to resist vertical and horizontal ground pressure. Sizes range from 900 imperial gallons (1080 US gals.) to 1500 imperial gallons (1800 US gals.) Each tank has two 19″ dia. manholes with provision to install 24″ dia. access riser section to ground surface. Tanks can be supplied with a 4″ inlet spigot. Addition connections are priced separately as required.
| SUPERTANK™ outline specifications: |
| Material: |
High density linear polyethylene (safe for food contact-water tanks). Meets FDA regulations 21 CFR 177.1520(C) 3.1 Wall thickness – 0.35″ +/- .03″. |
| Plumbing: |
Septic tanks are pre-plumbed with 4″ solvent weld PVC pipe connections, Tee Y’s, dip tubes and inspection plugs to local plumbing codes. (No plumbing in water cisterns.) |
| Access Lids: |
Two nom.24″ dia. Heavy duty molded polythylene. Each lid safety secured with 6 corrosion resistant screws. NOTE: Cistern tanks may be sealed watertight with silicone sealant under lid. |
| Risers: |
Risers for direct access from the ground surface fit over manway lids on the tank. An additional lid on the riser provides additional safety and security. (Lid on tank should remain in place for structural integrity.) See separate sheet for risers. Tanks accommodate 24″ dia. Polylok and UltraRib risers. |
| Water Table: |
Maximum allowable – 1′ above water level in tank to limit deflection in tank base. (Install dip tube on outside of tank.) |
| Installation:(see full instruction sheet) |
Maximum dirt cover above top of tank – 4ft. Use GRANULAR BACKFILL ONLY. Remove rocks from tank surface, compact evenly underneath and around tank. Lid must be secured in place when backfilling. Use extra heavy weight, two chamber tank in wet soils. NO WATER NEEDED IN TANK WHEN BACKFILLING. Refer to full installation instructions. CSA dead load test – 25,000 lbs. |
| Warranty: |
Premier Plastics below ground tanks are warranted for 10 years against defects and degradation in the material. (See full warranty sheet.) |
What are the TRIANGULAR RIBS™?
The unique Triangular Ribs™ are unparalleled in ability to resist vertical and horizontal ground pressure. The series of short, flat, triangular surfaces keeps the direction of the forces in line with each rib, this substantially increasing stiffness compared with curved ribbed tanks. In curved ribbed tanks, approximately 50% of the curved wall surface area is capable of resisting vertical loads, whereas 100% of the wall surface area of Triangular Ribs™ contributes to the load bearing capacity of the tank.
The importance of WALL THICKNESS
The unique Triangular Ribs™ are unparalleled in ability to resist vertical and horizontal ground pressure. The series of short, flat, triangular surfaces keeps the direction of the forces in line with each rib, this substantially increasing stiffness compared with curved ribbed tanks. In curved ribbed tanks, approximately 50% of the curved wall surface area is capable of resisting vertical loads, whereas 100% of the wall surface area of Triangular Ribs™ contributes to the load bearing capacity of the tank.
|
% Increase |
| Increase in wall thickness |
5 |
10 |
20 |
30 |
50 |
| Increase in stiffness |
16 |
33 |
73 |
120 |
230 |
| FOR EXAMPLE: A tank with 3/8″ wall thickness will be more than 3 times stiffer than a tank with 1/4″ wall thickness. |
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Canadian Selection Guide
USA Selection Guide