Hello, Thank you for leaving your review of the Ultramax toilet. We are sorry to hear that you are not completely happy with the flush performance. If there is anything we can do to make your experience better, please reach out to us directly. Our Technical Support team is standing by to take your call. They can be reached at 1-888-295-8134 between 8am - 8pm Mon - Fri EST and press 4 when prompted. We also have live chat on the TOTO USA website. I hope this helps and thank you for choosing TOTO.