A wax free pop-up seal 450 may be integrated with a spring 200 or other resilient component to connect a toilet to an existing soil pipe flange 325. A pop-up seal system 100 provides toolless, nondestructive and seamless height adjustment and comports with both smaller and larger diameter soil pipe flanges. For retro fit installations, a pop-up seal may comprise extended fins 471 for use with larger diameter soil pipe flanges and for use with smaller diameter soil pipe flanges, the extended fins may be removed. For new construction a new soil pipe flange is provided and a customized pop-up seal 600 comprises a seal system well suited for the new soil pipe flange. The pop-up seals may operate with or without springs or other external flexible components.