150 Gallon Double Wall Containment Tank, 34" Dia x 62"H, 14" Threaded Manway

The 150 Gallon Double Wall Containment Tank (34" Dia × 62" H with 14" Threaded Manway) is a heavy-duty, point-of-use secondary containment chemical storage vessel engineered for large commercial aquatic facilities, waterparks, high-volume natatoriums, and municipal chemical feed installations.

Featuring a vertical aspect ratio with a narrow 34-inch outer profile, it delivers bulk storage capacity while fitting through standard 36-inch equipment room doors without requiring wall modifications or double-door access. Designed with an integrated "tank-within-a-tank" geometry, it complies with EPA 40 CFR 264.175 and OSHA secondary containment standards without floor berms, containment dikes, or separate catch basins.

Mechanical & Structural Architecture

• Integrated Secondary Containment (115% to 120% Capacity): The outer containment envelope provides 115% to 120% capacity relative to the primary inner vessel. In the event of primary vessel mechanical rupture, stress cracking, or thermal fatigue, the full liquid volume is safely retained within the interstitial space, preventing chemical release onto equipment room pads.

• Rotomolded Monolithic Construction: Seamlessly molded as a single monolithic unit using virgin High-Density Linear Polyethylene (HDLPE) or High-Density Cross-Linked Polyethylene (XLPE). Monolithic rotational molding eliminates welded seams, joints, and stress risers vulnerable to chemical attack and cyclic hydraulic loading.

• Heavy Specific Gravity Rating (1.5 to 1.9 SG): Formulated with heavy-wall construction rated to handle high-density fluids up to 1.9 Specific Gravity, safely holding dense 12.5%–15% sodium hypochlorite (~1.20–1.22 SG) and 31.45% muriatic acid (~1.16 SG) without sidewall bulging.

• 14" Threaded Access Manway: Features an oversized 14-inch threaded polypropylene access lid with an integrated pressure-relief vent. The wide diameter allows easy internal visual inspection, drop-tube installation, and manual hose filling, while the breathable labyrinth/membrane vent relieves oxygen gas released from decomposing sodium hypochlorite and prevents vacuum collapse during high-rate dosing.

• Reinforced Top-Mount Equipment Flats: The rigid upper dome features molded flat landings to anchor commercial electronic diaphragm metering pumps, peristaltic feeders, level-sensor transmitters, and rigid top-draw suction lances.

• Visual Fluid Inventory Tracking: Molded in natural translucent polymer with raised gallon and liter graduation marks down the exterior sidewall, allowing operators to visually check chemical inventory levels without unthreading the access lid.

Technical Specifications

• Nominal Primary Volume: 150 US Gallons (approx. 568 Liters).

• Secondary Outer Volume: Approx. 175 to 180 US Gallons ($>115\%$ containment capacity).

• Overall Exterior Dimensions: 34" Outer Diameter × 62" Overall Height (approx. 86.4 cm Dia. × 157.5 cm H).

• Access Manway: 14" threaded polypropylene access lid with integrated pressure-relief breather.

• Specific Gravity Rating: Standard 1.5 SG (water/dilute acids) or Heavy-Duty 1.9 SG (concentrated bleach/acids).

• Operating Temperature Limits: -20°F to 120°F (-29°C to 49°C) continuous service.

• Fittings & Port Landings:

  • Top-dome flats accommodate up to three 2" NPT female bulkhead adapters (for top-draw suction lances, chemical fill lines, and interstitial leak detection float switches).

  • Top-draw plumbing architecture standard to eliminate bottom-penetration gravity leaks or siphon hazards.

Chemical Compatibility Reference

• Sodium Hypochlorite (12.5% – 15%): Fully compatible. The 14" vented threaded cap allows continuous dissipation of decomposing oxygen gas.

• Muriatic Acid (Hydrochloric Acid, 28% – 31.45%): Fully compatible. Sealed top-draw piping isolates corrosive fumes from mechanical room equipment.

• Sulfuric Acid (up to 50% concentration): Fully compatible under ambient equipment room conditions.

• Liquid Coagulants & Polyaluminum Chloride (PAC): Fully compatible; smooth non-stick interior minimizes polymer film buildup.

Weight and Logistics Profile

• Dry Tare Weight: Approximately 110 to 140 pounds (approx. 49.9 to 63.5 kg) empty, depending on wall thickness (1.5 SG vs. 1.9 SG).

• Full Fluid Operating Weight:

  • Filled with Water (1.0 SG): Approx. 1,360 to 1,390 lbs (approx. 617 to 630 kg).

  • Filled with 12.5% Sodium Hypochlorite (1.2 SG): Approx. 1,610 to 1,640 lbs (approx. 730 to 744 kg).

• Shipping Dimensions: Palletized freight footprint of approximately 36" L × 36" W × 67" H.

• Doorway Clearance: Fits cleanly through standard 36-inch clear commercial door openings without tipping or threshold modifications.

• Logistics Handling: Ships via LTL Motor Freight (Class 150 to 250 based on dimensional volume) shrink-wrapped and secured with heavy-duty corner edge protectors.