Drain fitting ST-G 3/4¨

Drain Nozzle ST‑G 3/4": reliable condensate drainage for rectangular air ducts

The ST‑G 3/4" drain nozzle offers a robust, durable, and installation‑friendly solution for exactly these situations. The large funnel is specially designed for rectangular air ducts and pulls the duct wall into a stable, tight shape during installation. The duct sheet sits watertight against the threaded nozzle, which is a decisive advantage for long‑term reliable drainage. All components are corrosion‑protected and available in galvanized steel, nickel‑plated brass, or as a V4A stainless‑steel variant.

With very low installation effort—simply drill a hole and screw in the nozzle—the drain nozzle can be quickly integrated into new or existing duct systems. With a 1/2" male thread, an 86 mm funnel outer diameter, and a sturdy nut design, it ensures a permanently tight connection even under demanding operating conditions.

In ventilation systems, condensate often accumulates at critical points in the air ducts. Without a defined drainage option, corrosion, hygiene risks, damage to the duct wall, or costly consequential damage may occur. During cleaning processes, additional liquid is also produced that must be reliably drained away.

Top Benefits

• Large, stable funnel for rectangular ducts
• Watertight fit thanks to the funnel‑shaped drawn‑in duct wall
• Fast installation without special tools
• Corrosion‑protected design (galvanized steel / nickel‑plated brass or V4A)
• Compatible with separately available drain‑nozzle cap

Additional Advantages at a Glance

• High material quality (corrosion‑protected), resulting in a low complaint rate
• Standardized dimensions and a variety of versions for flexible procurement
• Easy addition of separately available closure caps
• Ideal retrofit solution for condensate issues
• Clean drainage of cleaning fluids during duct cleaning
• Quick replacement or addition without major system downtime

Installation

• Extremely fast installation saves time on site
• Stable funnel automatically shapes the duct wall—no reworking required
• Secure, tight fit even with duct wall thicknesses up to 1.5 mm

Why is this drain nozzle suitable for you?

The ST‑G 3/4" drain nozzle is the first choice for professional contractors seeking a durable, tight, and installation‑friendly solution in duct construction—especially for condensate drainage and cleaning processes. It combines easy installation, robust construction, and high operational reliability into a cost‑effective overall package.

Application Scenarios

• Condensate drainage in rectangular air ducts
• Removal of cleaning fluids during duct hygiene processes
• Retrofitting in existing duct systems
• Use in HVAC projects, duct manufacturing, and system modernization

All information subject to change. Technical data, illustrations, and prices may vary. Errors excepted.