Plastic Plug Oatey 33403 4-Inch Red with Galvanized Screw and Wing Nut

Description

Product Overview

The Oatey 33403 Plastic Plug is engineered to deliver a reliable, leak‑free seal for 4‑inch red pipe systems. Constructed from high‑impact ABS plastic reinforced with glass fibers, the plug offers exceptional strength while remaining lightweight at just 8 ounces. A zinc‑plated steel handle provides a secure grip for installation, and a galvanized carriage bolt prevents corrosion even in harsh environments. The plug incorporates a natural rubber O‑ring that expands under pressure, ensuring a tight seal that can withstand up to 17 PSI (approximately 40 ft of head pressure). Its round, compact shape (3.75″ W × 3.75″ H) fits seamlessly into pipe ends, preventing the plug from falling into the stack during testing or maintenance.

Usage

Designed for both industrial and scientific applications, this expansion plug excels in pressure testing, system flushing, and temporary pipe blockage. It is ideal for HVAC technicians, plumbers, and maintenance engineers who need a dependable plug that can be quickly installed and removed without damaging the pipe. The plug’s corrosion‑resistant materials make it suitable for use with water, chemicals, and gases, allowing it to perform reliably in outdoor installations, chemical plants, and manufacturing facilities. Whether you are conducting a routine pressure test, isolating a section of a pneumatic system, or protecting a pipe end during storage, the Oatey 33403 delivers consistent performance.

Why Choose Us

Choosing the Oatey 33403 means selecting a product backed by over a decade of industry experience and a 1‑year limited warranty. Oatey’s commitment to quality is evident in the plug’s ABS glass‑reinforced construction, which resists cracking and deformation under load. The zinc‑plated handle and galvanized bolt are engineered to resist rust, extending the plug’s service life even in corrosive environments. Our customers benefit from clear, concise packaging that includes a single mechanical plug, eliminating the need for additional components. Additionally, Oatey provides responsive customer support, offering technical assistance and replacement parts should any issues arise.

Key Features

• Durable ABS body resists cracking and corrosion for long‑term reliability
• Metal handle and galvanized bolt ensure easy, secure installation without slipping
• Natural rubber O‑ring provides a tight, expandable seal that adapts to pressure changes
• Rated for up to 17 PSI, making it suitable for a wide range of testing and operational pressures
• Oatey’s 1‑year limited warranty and dedicated support give you peace of mind

FAQ

What pipe sizes does the Oatey 33403 fit?

The plug is specifically sized for 4‑inch (nominal) pipe ends, making it a perfect match for standard 4‑inch red pipe applications.

Can the plug be used with chemicals or only water?

Yes. The ABS construction and rubber O‑ring are chemically resistant, allowing the plug to be used with most non‑aggressive chemicals, water, and gases.

How do I install the plug safely?

Insert the plug into the pipe end, align the handle with the carriage bolt, and tighten the bolt until the O‑ring is fully compressed. Ensure the handle is firmly seated to prevent the plug from slipping.

Is the plug reusable after removal?

Absolutely. The plug can be removed, inspected, and re‑installed as long as the O‑ring remains intact and undamaged.

What is the warranty coverage?

The product comes with a 1‑year limited warranty covering manufacturing defects. Contact Oatey customer service for any warranty claims.