--- product_id: 325053484 title: "33402 Mechanical Test Plug, 3 in, 5 Psi Back, Plastic, 110 Deg F, 3-Inch, Red" brand: "oatey" price: "£18.26" currency: GBP in_stock: true reviews_count: 5 category: "Oatey" url: https://www.desertcart.co.uk/products/325053484-33402-mechanical-test-plug-3-in-5-psi-back-plastic store_origin: GB region: United Kingdom --- # 110°F temperature tolerance 3-inch size fit 5 PSI back pressure rating 33402 Mechanical Test Plug, 3 in, 5 Psi Back, Plastic, 110 Deg F, 3-Inch, Red **Brand:** oatey **Price:** £18.26 **Availability:** ✅ In Stock ## Summary > 🔧 Seal it tight, test it right — the pro’s choice for leak-proof confidence! ## Quick Answers - **What is this?** 33402 Mechanical Test Plug, 3 in, 5 Psi Back, Plastic, 110 Deg F, 3-Inch, Red by oatey - **How much does it cost?** £18.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/325053484-33402-mechanical-test-plug-3-in-5-psi-back-plastic) ## 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 - • **Reliable Pressure Seal:** Rated for 5 PSI back pressure, ensuring your pipe tests hold firm without leaks or failures. - • **Effortless Hand-Tightening:** Extra-large zinc wing nut means no wrench needed—tighten or remove with ease and zero rust worries. - • **Universal Pipe Compatibility:** Designed to seal end-of-pipe on most piping materials, preventing plugs from falling into stacks. - • **Corrosion-Resistant Components:** Galvanized carriage bolt and plastic body resist rust and corrosion, extending product life. - • **Durable ABS Reinforced Strength:** Glass-reinforced ABS plates provide unmatched durability for long-lasting, reliable sealing. ## Overview The Oatey 33402 Mechanical Test Plug is a 3-inch, red plastic plug engineered for reliable pipe sealing during pressure testing. Featuring a corrosion-resistant ABS reinforced body and an oversized zinc wing nut for easy hand tightening, it withstands up to 5 PSI back pressure and temperatures up to 110°F. Designed to fit most pipe materials, this plug prevents leaks and ensures secure end-of-pipe sealing, making it a trusted tool for plumbing professionals and DIY managers alike. ## Description OATEY test plug, mechanical, 3 in nominal, 5 psi back pressure, plastic, Red, 110 deg F, nsf listed. The OATEY 3 in. Plastic mechanical test plug helps seal piping or holds pressure while testing a piping system. The plastic body has minimal to no rusting or corroding for a long-lasting use. The plug's wing nut helps make tightening and removing the plug easy. Review: I opened the cap of my basement cleanout to find that it was missing the plug that is supposed to be there to seal it. Instead, someone had stuffed a large amount of plastic sheeting down it instead - not a good solution. Popped this into the cleanout, turned the large oversized wing nut easily by hand to tighten down and now I feel way more confident that sewer gasses aren't going to be leaking out. It's a simple little thing, but it's made well and I expect it to last forever. Review: exelnte sercio y calidad del producto los tiempos de entrega fueron los estipulados ## Features - Size: 3 Inch.End of Pipe Gripper plugs are made with ABS glass-reinforced plates for added strength - Extra large zinc wing nut for ease of tightening, no wrench required, and will not rust - Natural rubber O-ring for excellent expansion and memory - Plug is rated for 17 PSI or 40-ft of head pressure - End-of-pipe seals only at the end of a pipe, preventing plug from falling into stack.Galvanized carriage bolt to prevent corrosion.Galvanized mechanical plugs have a wide usage range making them effective on most piping material.Maximum allowed air is 5 PSIG on plastic and 2 PSIG on galvanized.Plastic mechanical plugs are premium plugs designed to hold higher pressures ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000H5WVQY | | Best Sellers Rank | #133,261 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,050 in Industrial Pipe Fittings | | Brand Name | Oatey | | Color | Red | | Customer Reviews | 4.7 4.7 out of 5 stars (1,276) | | Global Trade Identification Number | 00038753334028 | | Included Components | Electrical & Heating;Cord & Power Management;electric-plugs | | Item Dimensions W x H | 10.2W x 10.2H centimeters | | Item Type Name | Mechanical Test Plug, 3 In, 5 Psi Back, Plastic, 110 Deg F | | Manufacturer | Oatey | | Manufacturer Part Number | 33402 | | Material Type | Metal | | Model Number | 33402 | | Number of Items | 1 | | UPC | 038753334028 | | Unit Count | 1 Count | ## Product Details - **Brand:** Oatey - **Colour:** Red - **Material:** Metal - **Product dimensions:** 10.2W x 10.2H centimeters - **UPC:** 038753334028 ## Images ![33402 Mechanical Test Plug, 3 in, 5 Psi Back, Plastic, 110 Deg F, 3-Inch, Red - Image 1](https://m.media-amazon.com/images/I/51WRzMtO5uL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***. on 28 November 2019* I opened the cap of my basement cleanout to find that it was missing the plug that is supposed to be there to seal it. Instead, someone had stuffed a large amount of plastic sheeting down it instead - not a good solution. Popped this into the cleanout, turned the large oversized wing nut easily by hand to tighten down and now I feel way more confident that sewer gasses aren't going to be leaking out. It's a simple little thing, but it's made well and I expect it to last forever. ### ⭐⭐⭐⭐⭐ Review *by H***. on 13 January 2023* exelnte sercio y calidad del producto los tiempos de entrega fueron los estipulados ### ⭐⭐⭐⭐⭐ Review *by H***. on 19 June 2025* Nice product but slightly overpriced ## Frequently Bought Together - 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 - Oatey 33403 4-in. End of Pipe Gripper Mechanical Plug with Galvanized Screw and Wing Nut, 4 Inch, Red --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/325053484-33402-mechanical-test-plug-3-in-5-psi-back-plastic](https://www.desertcart.co.uk/products/325053484-33402-mechanical-test-plug-3-in-5-psi-back-plastic) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-23*