Horizontal Drain Kit

Horizontal Drain Kit | EPDM Through-Wall Roof Outlet

Reliable Through-Wall Drainage for EPDM Roofs

The Horizontal Drain Kit provides a controlled outlet where EPDM roofing discharges into a hopper, box gutter, or similar collection point. Ideal for parapet walls and upstands, it prevents ponding and reduces pressure at vulnerable roof edges.

Secure, Watertight Seal That Lasts

Mechanically fixed through the wall, the drain is dressed with membrane and sealed using the included EPDM primer and 9-inch uncured flashing tape. This forms a flexible, watertight seal that sits flush, sheds water efficiently, and remains secure under thermal movement and heavy rainfall. A fitted leaf grate helps limit debris, reducing the risk of blockages over time.

Installation Overview

Install through the wall, dress the membrane over the flange, then apply primer and uncured flashing tape to form a reliable seal at the outlet.

Specifications

Pack size:

• 1 × Horizontal Drain
• 1 × 9 inch Uncured Flashing Tape (500mm)
• 1 × EPDM Primer
• 1 × Leaf Grate

Size: Requires a hole size 105mm × 105mm

Application: Through-wall EPDM drainage outlet for parapets, box gutters, and hopper connections; mechanically fixed and sealed with uncured flashing tape and primer