Where can I buy a water blocking airbag?

[Freddie]

You can purchase it directly online. Here is an introduction to the function of the water blocking airbag: The water plug is a water blocking airbag, which mainly serves a protective function. Function 1: Some smaller water plug holes are processing channels during machining, and they are blocked with water plugs after the machining is completed. Function 2: Some larger water plug holes are designed to protect the engine block or cylinder head. If an engine filled with water in winter is forgotten to be drained, the water plug will expand first when the water freezes, thereby protecting the engine block or cylinder head to a certain extent. Working principle of the airbag water blocking: It uses a high-quality rubber airbag that is inflated to expand. When the gas pressure inside the airbag reaches the specified requirements, the airbag fills the entire pipe cross-section, and the friction between the airbag wall and the pipe blocks the water leakage, thereby achieving the purpose of no water seepage in the target pipe section.

[DeGrant]

I usually go to large building material markets to find water-blocking airbags, as hardware stores often carry such tools. When purchasing, pay attention to the material of the airbag—the rubber should be thick and elastic, otherwise it may leak. Also, choose the size based on the pipe diameter; if you get the wrong size, it won't fit at all. Last time I bought one, I had the store test it on-site—inflating it to the specified pressure and observing for half an hour to ensure no leaks before taking it home. I recommend bringing a knowledgeable friend along; working together makes selecting the right product easier. After buying, remember to keep the receipt in case you need to return or exchange it if issues arise. Actually, some tool rental shops also offer these for rent, which can be more cost-effective for short-term use.

[VanMackenzie]

I prefer buying pipe blocking inflatables online, as platforms like Taobao and JD.com are quite convenient. Before placing an order, I carefully review the product details, paying special attention to the material and pressure-bearing capacity. For a 10-cm diameter pipe, an inflatable with an 11-12 cm diameter is most suitable. Checking buyer reviews is crucial, especially those with actual video footage, to avoid purchasing poor-quality products that burst upon inflation. I recommend choosing sellers with local warehouses for faster delivery and hassle-free returns. Don’t go for the cheapest options—products under 50 yuan are often not durable. After purchase, I first test the seal with a slow inflation using a pump, then confirm no leaks by filling with water and pressurizing. For storage, keep them away from heat and sharp objects to extend their lifespan.

[LeSkylar]

There are plumbing test balloons available at the hardware store near my home. Last week when the main water pipe in our community leaked, I bought two for emergency use. Choosing the right size is crucial—the store owner had me measure the pipe's inner diameter before recommending the appropriate size. I tested the inflation and deflation functions on-site after purchase; the air valve must withstand at least 1 kg of pressure. Remember to clear any debris from the pipe walls before use, as puncturing the balloon would render all efforts futile. Store it away from light and moisture to prevent the rubber from aging and cracking. For temporary use, renting is more cost-effective, and most building material markets offer rental services.