This method is especially effective for addressing difficulties because of cleaning soap scum and grease. Having said that, warning must be exercised to prevent splashing, and it is probably not well suited for PVC pipes, as extended publicity to boiling water could perhaps lead to destruction. If fears persist, consulting https://www.google.com/maps/d/edit?mid=1McoQbcaMU7bU5qP8v1SkbyYUdZipymk&usp=sharing