First of all it is very handy. Konoha leaves and soil are mixed in tap water drawn from Tanigawa, it removes this, so it became hygienic considerably. I also recommend it to neighbors in the village and install it. However, replacing the thread wound filter is very difficult. I'd like you to have a pipe length of 15 mm longer with a lid under the top cover and entering the thread wound filter, so you can easily exchange it. Manufacturers and selling people think that they have never experienced the exchange of thread-wound filters, so please make improvements by all means.