We just moved into our home and we have a bath in the basement. It has a titan toilet installed. For the last week or so, the tank seems to intermittently fill or something. You hear it make a water rush noise for about 3 seconds and then its done. It repeats this about once every 5 minutes. I have been through the tank and comparing it to a working system that I have upstairs but I can not detect what the problem is. I am wondering if any of you may have run across the same issue and might want to offer some insight Thanks.