---
product_id: 72994482
title: "33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch, Red"
brand: "oatey"
price: "AR$39242"
currency: ARS
in_stock: true
reviews_count: 13
category: "Oatey"
url: https://www.desertcart.com.ar/products/72994482-33403-plastic-plug-with-galvanized-screw-and-wing-nut-4
store_origin: AR
region: Argentina
---

# 4-inch pipe fit Tool-free wing nut install 17 PSI pressure rating 33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch, Red

**Brand:** oatey
**Price:** AR$39242
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it, test it, trust it — the pro’s choice for pressure-proof piping!

## Quick Answers

- **What is this?** 33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch, Red by oatey
- **How much does it cost?** AR$39242 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/72994482-33403-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

- • **Seamless 4-Inch Seal:** Perfectly plugs open-ended pipes with a durable ABS glass-reinforced body for unmatched strength.
- • **Smart Expansion Seal:** Natural rubber O-ring expands to fit tight, preventing plug slippage and guaranteeing a secure fit.
- • **Pressure-Tested Reliability:** Rated to hold up to 17 PSI or 40 ft. head pressure, ensuring your system stays leak-proof.
- • **Corrosion-Resistant Durability:** Galvanized carriage bolt and zinc-plated steel handle resist rust for long-term use.
- • **Effortless Tool-Free Installation:** Extra-large wing nut lets you secure the plug quickly by hand—no tools, no hassle.

## Overview

The Oatey 33403 Plastic Plug is a robust 4-inch end-of-pipe sealing solution designed for professional-grade pressure testing. Featuring a glass-reinforced ABS body, corrosion-resistant galvanized hardware, and a natural rubber O-ring, it ensures a secure, tool-free installation that withstands up to 17 PSI. Trusted by plumbing pros for over a century, this plug delivers reliable, long-term performance in both residential and commercial piping systems.

## Description

Product 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. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry

Review: Very easy and good quality sewer cap . - Very good for a sewer clean out cap. Fit perfectly and tightened by hand no tools sealed perfectly.
Review: Best RV dump plug - A buddy of mine put in an RV dump that goes into his septic tank. I got this plug and installed it instead of the PVC screw on plug and it's awesome! Those screw on ones are fine when you first buy them, but when they get dirt in the threads, or the plug gets damaged or it's super cold out, etc, etc, they are a pain to remove and re-install. Well, for me they are because I have Parkinson's and my hands don't do what I want them to. This little unit works so easy, and you can use it on threaded or smooth pipe openings and it seals tight no matter what. Even with the tight fit, it is still easy to remove. It's built rock solid too

## 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 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #3,933 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Expansion Plugs |
| Brand | Oatey |
| Color | Red |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,797) |
| Date First Available | July 25, 2007 |
| Global Trade Identification Number | 00038753334035 |
| Included Components | (1) Mechanical plug |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 8 ounces |
| Item model number | 33403 |
| Manufacturer | Oatey |
| Material | Plastic |
| Measurement System | Inch |
| Number Of Pieces | 1 |
| Number of Handles | 1 |
| Number of Items | 1 |
| Part Number | 33403 |
| Product Dimensions | 3.75"W x 3.75"H |
| Shape | Round |
| Size | 1 Count (Pack of 1) |
| UPC | 038753334035 |
| Warranty Description | 1 year limited. |

## Product Details

- **Brand:** Oatey
- **Color:** Red
- **Item Weight:** 0.5 Pounds
- **Material:** Plastic
- **Product Dimensions:** 3.75"W x 3.75"H

## Images

![33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch, Red - Image 1](https://m.media-amazon.com/images/I/61VTSq2yS0L.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

### ⭐⭐⭐⭐⭐ Very easy and good quality sewer cap .
*by I***H on January 12, 2026*

Very good for a sewer clean out cap. Fit perfectly and tightened by hand no tools sealed perfectly.

### ⭐⭐⭐⭐⭐ Best RV dump plug
*by R***Y on July 21, 2025*

A buddy of mine put in an RV dump that goes into his septic tank. I got this plug and installed it instead of the PVC screw on plug and it's awesome! Those screw on ones are fine when you first buy them, but when they get dirt in the threads, or the plug gets damaged or it's super cold out, etc, etc, they are a pain to remove and re-install. Well, for me they are because I have Parkinson's and my hands don't do what I want them to. This little unit works so easy, and you can use it on threaded or smooth pipe openings and it seals tight no matter what. Even with the tight fit, it is still easy to remove. It's built rock solid too

### ⭐⭐⭐⭐⭐ Works great
*by E***N on January 12, 2026*

Great product. Used to test intercooler for heavy duty trucks and worked great.

## 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 Argentina*
*Store origin: AR*
*Last updated: 2026-02-02*