POLYSTOR are premium quality polyethylene tanks produced using advanced rotational molding technology to meet a wide range of water storage requirements and applications. Available in various sizes and capacities from 180 litres up to 68,000 litres, multiple tank systems can be configured and installed. WEIDA provides comprehensive technical services to customers in the planning, design and construction of tank systems.



> Public water supply

> Residential buildings – Housing and condominiums

> Resorts and hotels

> Commercial buildings (complexes, shops, offices)

> Schools, hospitals, army camps

> Factories

> Plantations and logging camps

> Agriculture and aquaculture farms



Product Features

> SIRIM CERTIFIED & SPAN APPROVED – POLYSTOR are certified by SIRIM to Malaysian Standards MS1225 with Product Certification Listing from SPAN (Suruhanjaya Perkhidmatan Air Negara)

> STRONG, DURABLE AND LIGHTWEIGHT – Inherent properties of molded polyethylene tanks making them easy to install, handle and transport

> LEAKPROOF – POLYSTOR tanks are manufactured in seamless, single-piece construction

> FOOD AND WATER CONTACT SAFE – Polyethylene meets standards of US FDA and SIRIM for food and potable water contact safe

> CORROSION RESISTANT – Polyethylene requires no painting maintenance against rusting

> UV RESISTANT – Polyethylene material for POLYSTOR tanks are UV stabilised with a UV8 rating as per MS1225 requirements

> COLOUR OPTIONS & MULTILAYER CONSTRUCTION – While standard colours are black and blue, POLYSTOR tank can be customised in other colours. They can also be produced in multilayers with white inner walls to reflect tank hygiene

> WIDE RANGE OF SHAPES & DESIGNS – POLYSTOR tanks are designed to cater for

  • Cylindrical type – Strong and sturdy for outdoor storage
  • Rectangular / Square type – Compact design to maximise storage for tight spaces
  • Taper type – Low height especially for use under the roof pitches. Nestable for advantages in transportation

> MODULAR SYSTEM FOR LARGE CAPACITIES – POLYSTOR tanks can be installed in a cluster to form a system of interconnected tanks to meet any storage capacity requirements. They can be designed in modules to ensure that water supply remains uninterrupted during cleaning maintenance. Modular design also allows future expansion

> WIDE RANGE OF FITTINGS & ACCESSORIES – POLYSTOR tanks come with a range of accessories including tank covers, ladders, level indicators, vents etc. They can also come with pre-fitted fittings like spinwelds, tank connectors and flanges for the inlets, outlets, overflow and drain

> WARRANTY – Quality assurance and 10-years warranty



Product Range


Cylindrical Tank

Taper Tank

Square Tank



Project References

Lexus Car Showroom, Kuching

Emart, Kuching

Ayam A1, Leong Hup Group, Muar, Johor