The screw part was rusty. The plug is hard and can not be removed (the strainer can not be inspected). Even if the seal tape is wound thickly, water will ooze from the threaded portion of the nipple. I could not use it after all.
1. It seems that there are a lot of sand and it has to be cleaned frequently. 2. Although the weight is 3.4 kg, it is heavier than I thought. Combination with PVC pipe is not good. 3. I am checking the presence or absence of a replacement filter, but I think that there is no answer yet and I am not separately selling it. 4. The drain screw was easily removed, but the filter screw could not be removed even with a large pipe wrench. It seems better to think that it can not be removed basically. In other words, it is better to consider the whole exchange.
The mesh lid is too hard to open easily, I think that it is better to pay attention to people who purchase it. At first, I did not open the lid for taking out the mesh and thought that screwing was poor, I had them exchange it, but although I should have sent the thing that opened the lid properly, the next thing did not open as well. It seems that all say the same thing. I do not know how hard it was screwed in, but it was impossible with my own power so I brought it to the next car repair shop and had it finally opened without vise. I thought that I wanted it not to screw strongly enough so that the screws would stick because it was a problem because I was in trouble if the lid would not open after plumbing. Even though it is an unused item, even if it is slightly rusted it is hard enough, the manufacturer wants to try opening the lid once.