TopTank 7500L Cylindrical Water Storage Tank, UV-Stabilized Polyethylene

TopTank 7500L Water Tank

The TopTank 7500L Water Tank is a high-capacity vertical storage solution engineered for commercial, agricultural, and large-scale residential water management systems. Manufactured from food-grade, high-density polyethylene (HDPE) using a rotational molding process, this vessel ensures a seamless, stress-free construction that eliminates potential leak points common in welded alternatives. This specific model is designed for surface-level installation, providing a reliable reservoir for rainwater harvesting, municipal backup, or construction site water supply.

Built for the Job

Site supervisors and plumbers select this 7,500-litre unit for projects requiring significant water reserves without the footprint of multiple smaller containers. The cylindrical profile with integrated ribbing provides the necessary structural rigidity to handle the hoop stress exerted by 7.5 tonnes of water. On-site installation requires a level, compacted concrete plinth to prevent uneven settling, which could compromise the tank base over time. The dark pigmenting, typically in black or dark green, serves a functional purpose by blocking light transmission to prevent internal algae growth, maintaining water quality for extended periods.

• Primary reservoir for multi-unit residential plumbing systems.

• Bulk water storage for industrial cooling or dust suppression on construction sites.

• Large-scale rainwater collection for agricultural irrigation and livestock.

Product Highlights

Advanced Material Composition

The tank uses UV-stabilized LLDPE to resist brittleness and cracking caused by prolonged exposure to intense equatorial sunlight.

Structural Reinforcement

• Molded horizontal ribs increase side-wall strength against hydraulic pressure.
• Heavy-duty screw-down lid prevents debris ingress and secures the contents.

Technical Specifications

What’s Included

• 1 x 7500 Litre Cylindrical Water Tank

• 1 x Heavy-Duty Screw-on Inspection Lid

• Standard Outlet and Overflow Fittings (Pre-installed)

On-Site & Workshop Notes

• Ensure the concrete base is at least 150mm thick and extends 100mm beyond the tank diameter for stability.

• Plumbing connections should include flexible couplings to accommodate slight tank expansion and contraction during fill cycles.

• This surface-mount unit is not rated for underground burial; doing so will void the structural warranty.

• Regularly inspect the breather vent in the lid to ensure vacuum pressure does not build up during high-volume discharge.