400 US gallon HDPE Royal Water Tank – Horizontal Tank

This compact-capacity Royal HDPE model combines horizontal placement with 4 functional layers designed for structural protection and water-storage quality. UV-stabilised material, a light-blocking shield, thermal insulation and a food-grade inner surface work together, while the lid-mounted smart air vent supports internal ventilation.

Key Features

• Grey Thermal-Insulation Layer: A dedicated grey polyethylene insulation layer helps reduce heat transmission from the surrounding environment towards the stored water.
• Smart Air Vent: A built-in smart air vent integrated into the lid supports internal airflow and is designed to help reduce heat accumulation inside the tank.
• 7-Year Warranty: Every Royal HDPE water tank is backed by a 7-year warranty, providing longer-term confidence in the selected product.
• 4-Layer HDPE Construction: Manufactured using German blow-moulding technology, the Royal water tank uses 4 functional HDPE layers that combine external, light-shielding, thermal and internal protection.
• UV-Stabilised and Sun-Shield Protection: The UV-stabilised exterior supports the tank during outdoor sunlight exposure, while the black sun-shield layer helps limit light penetration through the tank wall.
• Food-Grade Inner Layer: The innermost food-grade HDPE layer provides a suitable contact surface for potable-water storage and water used throughout the home.
• Fungal and Bacterial Growth Protection: The protective black layers are designed to help prevent fungal and bacterial growth inside the tank, supporting better-protected water storage.

Core Product Benefits

• Flexible Compact-Capacity Storage: The 400 gallon size supports moderate or supplementary requirements in a practical horizontal format.
• Better-Quality Water for Daily Use: Food-grade contact material and internal protection support drinking, bathing and everyday care for skin and hair.
• Reduced External Heat Impact: The grey insulation layer helps limit heat transmission from outside the tank to the stored water.
• Confidence in Everyday Performance: A strong 4-layer body, recognised certifications and a 7-year warranty support long-term product confidence.
• Best Water Tank for Sensitive Skin and Hair:
  Supported by approved certifications and documented testing, Royal HDPE is medically suitable for sensitive skin, scalp and hair. Its stored water does not cause irritation or allergic reactions over time, making it the UAE’s best choice for medically supported skin and hair safety.

Suitable For

The 400 gallon capacity can suit homes, buildings, small businesses, remote commercial locations, outdoor events, camping setups and projects requiring moderate or supplementary water storage. Its horizontal configuration is particularly relevant where a lower overall profile is preferred and the available base area can accommodate the tank safely.

Certifications

The Royal HDPE range is supported by approvals and compliance evidence covering potable-water suitability, food-contact requirements, quality management and product compliance within the documented scope of each certificate. These credentials add an additional trust layer when evaluating the tank for household water storage.

• WRAS
• Dubai Municipality DCL
• Dubai Municipality FCM
• ISO 9001:2015 - Quality Management System
• TCCPL Certificate of Compliance