--- product_id: 7896079 title: "Cherne 270032 Test-Ball 3-Inch Plug, Black" brand: "cherne" price: "£29.32" currency: GBP in_stock: false reviews_count: 8 url: https://www.desertcart.co.uk/products/7896079-cherne-270032-test-ball-3-inch-plug-black store_origin: GB region: United Kingdom --- # 3-inch natural rubber expandable plug Zinc-plated steel ring & chain anchor Tests up to 13 PSI pressure Cherne 270032 Test-Ball 3-Inch Plug, Black **Brand:** cherne **Price:** £29.32 **Availability:** ❌ Out of Stock ## Summary > ⚡ Seal the deal with confidence—plug in, test out, and never miss a leak! ## Quick Answers - **What is this?** Cherne 270032 Test-Ball 3-Inch Plug, Black by cherne - **How much does it cost?** £29.32 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/7896079-cherne-270032-test-ball-3-inch-plug-black) ## Best For - cherne enthusiasts ## Why This Product - Trusted cherne brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Versatile:** Slim 3-inch design fits easily through test tees, sanitary tees, and floor drains—no pipe left untested. - • **Effortless Inflation:** Standard tire air fitting ensures quick, hassle-free inflation and deflation on the job. - • **Secure Anchor System:** Zinc-plated steel ring and chain prevent plug from slipping, keeping your test safe and stable. - • **Adaptive Seal Technology:** Natural rubber body expands to perfectly seal both round and out-of-round pipes, even in tight spots. - • **Pressure-Proof Precision:** Confidently test DWV systems at up to 13 PSI/30 ft pressure for reliable results. ## Overview The Cherne 270032 Test-Ball is a 3-inch inflatable natural rubber plug designed for DWV system testing up to 13 PSI. Featuring a durable zinc-plated steel ring and chain for secure anchoring, it adapts to both round and irregular pipe shapes and fits through tight access points, making it an essential tool for professional plumbers and contractors seeking reliable, efficient pressure testing. ## Description Cherne 270032 Test-Ball 3-Inch Plug , Black ## Features - Test ball plug 3 in. nominal size - Tests DWV systems at pressures up to 13 PSI/30 ft. - Natural rubber body provides excellent expansion - Inflatable design can be inserted through a test tee to seal out-of-round pipe and hard-to-access openings - Utilizes a standard tire air fitting for easy connections - Ring and chain assembly helps prevent the plug from being drawn into DWV systems during tests - Made of natural rubber for excellent expansion and memory. - Seals both round and out-of-round pipe. - Zinc-plated steel chain and ring handle acts as an anchor to prevent plug from sliding down a line. - Fits easily through test tees, sanitary tees, floor drains, and other "tight" situations. - Size 3 in ## Technical Specifications | Specification | Value | |---------------|-------| | Material | Rubber | | Brand | Cherne | | Color | Black | | Product Dimensions | 3"W x 3"H | | Item Weight | 6.3 Ounces | | UPC | 756655084321 675115270039 | | Global Trade Identification Number | 00756655084321, 00675115270039 | | Number of Items | 1 | | Manufacturer | Cherne | | Part Number | 270032 | | Item Weight | 6.3 ounces | | Item model number | 270032 | | Size | 3 Inch | | Thickness | 1 Inches | | Item Package Quantity | 1 | | Measurement System | English | | Included Components | Unit^Instruction Guide | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Material:** Rubber - **Brand:** Cherne - **Color:** Black - **Product Dimensions:** 3"W x 3"H - **Item Weight:** 6.3 Ounces ## Images ![Cherne 270032 Test-Ball 3-Inch Plug, Black - Image 1](https://m.media-amazon.com/images/I/51mCjZOSPBL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How do you blow it up** A: It has the same fill valve as your car tire or bicycle tire. Any regular hand or foot pump will work. **Q: Can these be used to block a sewer drain pipe in a basement to attempt to block water from coming into the basement say during a flood?** A: Interesting question. I would think so, but that's only an educated guess; I have not used one for that purpose. For the typical purpose of pressure testing drain pipes, my county's inspection required the system to hold 5 psi for 15 minutes, which this test ball easily held. 5 psi is equal to 138 inches water column, so if the test ball holds water pressure as effectively as it does air pressure, it would hold back water pressure from flood waters 11 1/2 feet higher than where the plug is. I believe the plug could hold back significantly more air pressure than 5 psi. However, performance with water, not air, might be worse because the water could reduce friction and possibly let the plug slip. And then, even if this holds back water rising in the drain pipe, if the water level is high enough, there will be other places it gets into the house. Bottom line - I wouldn't count on it as the primary means of preventing entry of flood water, but as a backup or last resort, it would definitely be worth a try. Especially if flood waters aren't high enough to put significant pressure on basement walls. **Q: What are the chances of this product working on a corregated drain pipe? No pressure involved. Just infiltrating groundwater.** A: No experience with this use, but I'd say good chance it will hold back most of the water, if it's not pressurized. The plug should contact 3 or 4 of the "ribs" inside the corrugated pipe. That said, there's always going to be some head pressure if there's a height difference between the end of the pipe and the source of the water. If you need zero water leaking through, I wouldn't count on this. **Q: does this come with an adapter for an air pump that fits a Presta valve, instead of the standard shrader valve?** A: No, and we found that using a bike pump was not successful anyway. The act of removing the pump hose from the ball allowed too much air to escape. The ball deflated to the point that it was not water-tight. There really is only a small volume of air in the ball. We got the best results using an air chuck mounted on an air hose running from a small compressor. ## Customer Reviews ### ⭐⭐⭐⭐⭐ A way to clean the toilet's upper rim *by O***N on January 30, 2021* For cleaning the upper rim when using a brush and cleaner won't do. A bit pricey for what it does, but I imagine it will last for decades. It has a standard valve (like a car tire). Flush the toilet, turn off the intake water. Stick this in the hole. Inflate it a bit, not a lot, maybe one or two pumps for a firm fit. Obviously the valve stem is facing out, towards you.Now fill the toilet with CLR up to the rim of the toilet, one or two containers, maybe topping it off with some water to get the water/CLR level up above the overhang. (The more you dilute the CLR with water the longer it will take to clean: I used two gallons) Let it sit for five or six hours. The CLR will eat away all the junk and hard water lime deposit that has accumulated over time.When you are done, stick a pencil or other thin object in to deflate the plug, the way you would let air out of a tire. As the plug loosens, which takes only a few seconds, you can pull it out. And the water level in the bowl will fall to its normal level. Turn the supply valve on again. When the tank is full flush the toilet and say goodbye to all the CLR. The toilet bowl should be clean.This is how you get the rim. If you have lime deposit at the bottom of the toilet you don't need this thing. Just turn off the supply valve, flush, and fill with CLR. That will take care of the bottom of the toilet bowl.But to get the whole bowl right up to the rim (past the rim jets that fill the bowl from the sides), you need something like this stopper technique. I have seen people recommending using a balloon filled with water to stop up the toilet hole but I did not want to chance having the thing pop and getting rubber stopped up in the drain pipe. This plug device is solid and is to big to flush. (The plug has other applications in high pressure plumbing, the instructions are all about those applications, which have absolutely nothing to do with cleaning your toilet)It's not a cheap cleaning technique, you need two big bottles of CLR and this plug (which is re-usable), but then again, you don't need to do it often. And it certainly is easier than some of the alternatives I've seen on line, one of which included taking the toilet apart, hauling it outside, turning it over, and scrubbing to get inside the lip/overhang at the top of the rim. The technique I have described will run about $50 and is well worth it.A cheaper alternative to CLR might be coca cola, which you can read about on the net. I've never tried it. CLR has three different acids in it, one specifically designed for mineral deposits. Coca cola has one acid in it, designed to destroy your teeth, which come to think of it are minerals. So the choice is yours. If the coke doesn't work try the CLR. Or not. There's a limit to how much aggro I want to devote to this operation. The key in both cases is to give the cleaning agent time to attack the debris. I can tell you CLR works impeccably. ### ⭐⭐⭐⭐⭐ perfect for removing hard water stains in toilet bowls *by S***E on April 12, 2024* If you live in an area with hard water, you are undoubtedly annoyed by the hard water stains and rings in your toilet bowl. This has nothing to do with keeping your toilet bowl clean, the hard water will cause a ring right at the level of the water in the bowl. Without some way to plug the bowl, you can't overfill it with CLR or another cleaner and let it soak. This device is easy to use. Just insert it into the toilet bowl, inflate it, add the CLR or other cleaner, and let it sit for a few hours. ### ⭐⭐⭐⭐ Works well *by K***N on May 1, 2021* Worked as advertised, good product, well made ## Frequently Bought Together - Cherne 270032 Test-Ball 3-Inch Plug , Black - Cherne 270024 2 in. Rubber Test Ball Pipe Plug, Black - Cherne 270040 Rubber Test Ball Pipe Plug, 4" , Black --- ## 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/7896079-cherne-270032-test-ball-3-inch-plug-black](https://www.desertcart.co.uk/products/7896079-cherne-270032-test-ball-3-inch-plug-black) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-15*