Durable HDPE Equal Tee 63-630mm for Rain Water

Product Overview

The Durable HDPE Equal Tee 63-630mm for Rain Water is a heavy-duty junction fitting engineered specifically for large-scale rainwater drainage systems. Manufactured from PE100 grade HDPE—the highest performance polyethylene for pressure applications—this tee creates uniform branch connections in stormwater pipelines, ensuring efficient water distribution across residential complexes, commercial campuses, and municipal drainage networks. Unlike concrete or metal alternatives that crack under ground movement, its flexible molecular structure absorbs soil shifts and temperature fluctuations, maintaining structural integrity for over 50 years in buried applications . Compliant with EN 1519-1:2019 standards for polyethylene drainage systems, this tee handles high-volume rainwater flow while resisting corrosion from acidic rain and soil contaminants.

Product Features

Stormwater-Optimized Design

Each tee features equal bore dimensions (63mm to 630mm OD) across all three ports, minimizing flow resistance at junctions. The smooth inner wall (Ra <0.01mm) reduces turbulence, allowing debris-laden rainwater to pass through without clogging—a critical advantage over corrugated metal fittings that trap leaves and sediment. The 90° branch angle is precision-molded with a tolerance of ±0.5°, ensuring accurate alignment in large-diameter pipeline runs.

UV and Chemical Resistance

Formulated with 2–3% carbon black additive, the HDPE material provides exceptional UV stability, preventing photo-oxidation in above-ground installations exposed to direct sunlight. This additive also enhances resistance to acidic rain (pH 4–6) and soil chemicals, making the tee suitable for installations in industrial zones or areas with high mineral content in soil . The material remains flexible at temperatures as low as -40°C, preventing winter cracking, and maintains stability up to 95°C during summer heat waves.

Heavy-Duty Construction

The one-piece molded design eliminates weak points, with a wall thickness optimized for SN8 ring stiffness (8 kN/m²) in sizes ≥200mm—sufficient to withstand traffic loads when installed under roadways. Its lightweight properties (60% lighter than concrete fittings) reduce transportation and installation costs, while compatibility with electrofusion and butt fusion techniques ensures leak-proof joints that integrate seamlessly with existing HDPE drainage networks.

Applications

This robust equal tee excels in large-scale rainwater management:

• Municipal Stormwater Systems: Branches main drainage lines in urban flood control networks, handling peak flow rates during heavy rainfall.

• Commercial Developments: Distributes rainwater from rooftop drainage to underground retention systems in shopping malls, airports, and industrial parks.

• Residential Communities: Connects subdivision drainage networks to municipal mains, preventing localized flooding during storms.

• Infrastructure Projects: Integrates into highway drainage and tunnel water management systems, where durability under heavy loads is critical .

FAQ

What makes this tee suitable for large-diameter rainwater systems?

The PE100 HDPE construction and 63–630mm OD range provide the strength and flow capacity needed for high-volume stormwater applications. Its equal bore design minimizes pressure loss, while the SN8 ring stiffness ensures structural integrity under soil and traffic loads.

Can it be used in both above-ground and buried installations?

Yes. The carbon black additive protects against UV degradation in above-ground use, while compliance with EN 1519-1 "BD" classification certifies it for buried applications within building structures .

What installation methods are recommended?

Professional installation using electrofusion or butt fusion is required. These methods create molecular bonds between the tee and pipes, ensuring leak-proof joints that withstand ground movement and pressure fluctuations.

How does it resist clogging compared to metal tees?

The smooth inner wall and equal bore design eliminate flow restrictions that trap debris in metal fittings. This reduces maintenance costs associated with cleaning and unblocking rainwater lines.