---
product_id: 345711940
title: "33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch"
brand: "oatey"
price: "501 kr"
currency: NOK
in_stock: true
reviews_count: 6
category: "Oatey"
url: https://www.desertcart.no/products/345711940-33403-plastic-plug-with-galvanized-screw-and-wing-nut-4
store_origin: NO
region: Norway
---

# 4-inch pipe fit precision ABS glass-reinforced strength 17 PSI pressure rating 33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch

**Brand:** oatey
**Price:** 501 kr
**Availability:** ✅ In Stock

## Summary

> 🔩 Seal it tight, test it right — the pro’s choice for flawless pipe plugs!

## Quick Answers

- **What is this?** 33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch by oatey
- **How much does it cost?** 501 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/345711940-33403-plastic-plug-with-galvanized-screw-and-wing-nut-4)

## Best For

- oatey enthusiasts

## Why This Product

- Trusted oatey brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unmatched Durability:** ABS glass-reinforced plastic resists corrosion and wear
- • **Long-Term Performance:** Chemical-resistant rubber O-ring ensures lasting expansion and memory
- • **Reliable Pressure Seal:** Mechanically expands to hold up to 17 PSI or 40 ft. head pressure
- • **Effortless Installation:** Extra-large wing nut for quick, tool-free setup
- • **Corrosion-Proof Hardware:** Galvanized carriage bolt and zinc-plated steel handle for ultimate rust resistance

## Overview

The Oatey 33403 Plastic Plug is a 4-inch end-of-pipe mechanical plug designed for secure sealing and pressure testing in plumbing systems. Crafted from ABS glass-reinforced plastic with a chemical-resistant rubber O-ring, it withstands up to 17 PSI and prevents corrosion with galvanized and zinc-plated hardware. Trusted by professionals for over a century, it offers easy, tool-free installation with a large wing nut, making it ideal for both temporary and long-term pipe sealing applications.

## Description

Oatey End-of-Pipe Gripper Plugs mechanically expand to seal the end of a pipe and hold pressure when testing a piping system. The extra large wing nut makes installation easy without tools. Oatey products have earned the trust of plumbing professionals for over 100 years.

Review: Slightly overpriced - Good product, but slightly overpriced
Review: Perfect fit - Bought this to seal off a toilet flange that we are no longer needing. This toilet flange was too hard to remove and at some point we may want to reinstall the toilet. The 4 inch sized one works perfect. A nice tight seal.

## Features

- End-of-pipe plug seals or holds pressure to test piping system
- Plugs open-ended 4 in. pipes
- Made with ABS glass-reinforced plates for added strength
- Mechanically seals only at the end of a pipe, preventing plug from falling into stack
- Rated for 17 PSI or 40 ft. of head pressure
- Can be used in long-term applications
- Plastic plug body will not rust or corrode
- Natural, chemical-resistant rubber O-ring for excellent expansion and memory
- Zinc-plated steel handle
- Galvanized carriage bolt to prevent corrosion

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000H5T1PI |
| Best Sellers Rank | #146,869 in Home Improvement ( See Top 100 in Home Improvement ) #177 in Plugs |
| Brand | Oatey |
| Colour | Red |
| Country of Origin | USA |
| Customer Reviews | 4.7 out of 5 stars 1,893 Reviews |
| Enclosure Material | Plastic |
| Global Trade Identification Number | 00038753334035 |
| Included Components | (1) Mechanical plug |
| Item Dimensions W x H | 44W x 95H Millimeters |
| Item Type Name | 4-in. End of Pipe Gripper Mechanical Plug with Galvanized Screw and Wing Nut |
| Item Weight | 227 g |
| Manufacturer | Oatey |
| Manufacturer Part Number | 33403 |
| Manufacturer Warranty Description | 1-year limited |
| Material | Plastic |
| Model number | 33403 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Dimensions | 44W x 95H Millimeters |
| UPC | 038753334035 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Oatey
- **Colour:** Galvanized
- **Item Weight:** 0.5 Pounds
- **Material:** Plastic
- **Product Dimensions:** 9.5W x 9.5H Centimeters

## Images

![33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch - Image 1](https://m.media-amazon.com/images/I/61n+a7FAwRL.jpg)

## Questions & Answers

**Q: What size is the bolt and how long is it?  Thanks.**
A: I measured the bolt at 3/8" threaded diameter with 2 1/4" of threaded length. Since this is not specified in the description and other bolt lengths would work the same, it may be you'd end up with a different bolt length.

**Q: Would this stand up to the abuse of an ATV, as a dry storage tube cap?**
A: I would think so. It’s pretty sturdy

**Q: Will this seal the 31/4" cleanout hole in 4" cast iron sewer line?**
A: This plug properly fits a 4" hole. Mine is in use so I cannot measure it. However, I also purchased the 3" plug and I believe it would be more appropriate. At max, it achieves about 3 1/8 seal. If you wrap enough material around the 3" you might get a more usable product.

**Q: End of RV slinky storage tube is 4.5 " diameter.  When rubber is compressed will this be tight enough to survive vibration of normal travel?**
A: It's meant to hold fast in a firm pipe, like PVC.  I wouldn't recommend it for a hose or pipe with give. The rubber gasket only moves out a little bit when tightened. Maybe you could get a large hose clamp and tighten it down outside your hose after you cover the end with aluminum foil.

## Customer Reviews

### ⭐⭐⭐⭐ Slightly overpriced
*by H***. on 19 June 2025*

Good product, but slightly overpriced

### ⭐⭐⭐⭐⭐ Perfect fit
*by J***S on 20 March 2021*

Bought this to seal off a toilet flange that we are no longer needing. This toilet flange was too hard to remove and at some point we may want to reinstall the toilet. The 4 inch sized one works perfect. A nice tight seal.

### ⭐⭐⭐⭐⭐ Perfect Solution for Capping an Unused Toilet Drain - Sealed Tight and Installed in Seconds
*by M***E on 6 June 2026*

I purchased this Oatey 4-inch test plug to cap the drain after removing a toilet from an unused half bath that we're converting into a linen closet. After removing the toilet, I discovered the existing toilet flange was offset rather than centered. My initial concern was that the plug might not fit properly or create a reliable seal. Fortunately, those concerns disappeared as soon as I installed it. The plug fit perfectly into the flange, and with just a few turns of the wing nut, the rubber expanded securely against the pipe walls and created a tight, solid seal. Installation took only a couple of seconds and required no special tools. The construction appears robust, with a sturdy plastic body, galvanized hardware, and a thick rubber sealing surface. Once tightened, it remained firmly in place without any movement. Most importantly, it completely sealed the drain and eliminated any concern about sewer gases entering the room. For anyone repurposing a bathroom, remodeling, or temporarily removing a toilet, this is a simple and effective solution. Overall, this is one of those products that does exactly what it's designed to do. It's well made, easy to install, provides an excellent seal, and gives peace of mind that the drain is properly capped. Highly recommended.

## Frequently Bought Together

- Oatey 33403 4-in. End of Pipe Gripper Mechanical Plug with Galvanized Screw and Wing Nut, 4 Inch, Red
- Oatey 33402 Mechanical Test Plug, 3 in, 5 Psi Back, Plastic, 110 Deg F, 3 Inch, Red
- Oatey 33400 Mechanical End-of-Pipe Gripper Plug, 1-1/2 in., Red, 1 Count

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-11-11*