Accessories 4 in. riser making a standard toilet compliant with the American with Disabilities Act Raises a standard toilet to 18 inches Complete installation kit Finished installation Support bars 1 1/4 in. diameter. Stainless steel. 1 1/2 in. spacing. PureBain : five stage inline water filter Removes up to 99.99% of contaminants including arsenic, chlorine, lead, fluoride, heavy metals, bacteria, virus, pharmaceuticals and 1000+ contaminants.