Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.
As a sometime new build contractor (and I did most of soil pipes as I was fastest at them)
Angle grinder diamond blade and don't forget PPE
Did literally thousands 1200 on one site alone over 10 years.