HDPE Butt Fusion S-Trap for Siphonic Drainage

An S-trap manufactured from high-density polyethylene, featuring a vertical downward outlet for connection to vertical drainage stacks.

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Category: HDPE Siphonic Fittings

HDPE Siphonic Fittings

Product Overview

An S-trap manufactured from high-density polyethylene, featuring a vertical downward outlet for connection to vertical drainage stacks. This HDPE S-trap turns flow downward into the stack while holding a 50 mm water seal that blocks sewer gas, all in one compact fitting with no extra elbows. Built to ISO 8770 and EN 1519-1 for DN 50 to 315 mm drainage systems.

Quick Information

Diameter Range: DN 50 - 315 mm
Applicable Standards: ISO 8770, EN 1519-1
Stock: In stock

Specification Table

	Article	d1/d2	K	k1	k2	k3	k4	e
S Trap	S Trap	50	116.0	5.0				4.0
	S Trap	75	145.0	5.0				4.0
	S Trap	110	207.0	5.0				5.5

Key Features

Vertical Outlet Design: The HDPE S-trap turns flow downward into vertical stacks, eliminating extra elbows at floor-drain connections.
Reliable Water Seal: This siphonic drainage trap maintains a deep 50 mm water seal that blocks sewer gas and odors from occupied spaces.
Self-Cleaning S-Bore: The HDPE S-trap has a smooth internal curve that scours itself at every discharge, resisting sediment buildup.
PE100 Material Strength: This siphonic drainage trap is molded from PE100 for high impact resistance and decades of buried or exposed service.
Leak-Free Fusion Joints: The HDPE S-trap welds to HDPE pipe by butt or socket fusion, forming a homogeneous watertight unit.
Full Size Range: This siphonic drainage trap covers DN 50 to 315 mm for floor drains and vertical stack connections.

Production

Raw Material

Every HDPE S-trap is molded from certified virgin PE100 resin with carbon black UV stabilizer, batch-tested for melt flow rate and density.

Molding Process

Each siphonic drainage trap is injection molded with precision cores that form the S-bend and seal weir in one cycle, holding dimensional tolerance within 0.1 mm.

Quality Control

Batches of HDPE S-traps are sampled for water seal depth verification, hydrostatic pressure testing and fusion joint integrity per ISO 8770 and EN 1519-1.

Applications

Floor drains discharging downward use the HDPE S-trap for compact connections to vertical stacks.
Siphonic drainage systems rely on this siphonic drainage trap where collectors turn down into risers.
Basement drainage installs the HDPE S-trap for odor-tight connections below slab level.
Public buildings choose this siphonic drainage trap for maintenance-free gas sealing.