Bathway - The Tub Cutting People: Tub To Shower Conversions In Just Over An Hour! Bathway's bathtub-to-shower conversion process transforms your existing bathtub into a safe and accessible bathtub or walk-in shower in just over an hour. We manufacture our own bathtub conversion products, we are able to offer multiple shapes and sizes to suit practically any existing tub. We also provide other bathroom safety solutions including grab bars and hand-held shower heads.