I have a Hayward filter that I'll attach pictures of. I inherited this filter and the pipes from the previous owner. It's circulating the water really well and everything seems to be working. The only issue is I continually have to keep bleeding off air. It's about everybody 15 minutes or so it is filed with air and I have to bleed it out. I've duct taped all my connections to try and make them air tight. I have replaced all my o-rings and I'm still getting air. Please tell me what I'm doing wrong.