In particular, if you have set your routing preference to a "combination Wye" fitting and then try to replace it with a "sanitary tee," you may run into difficulties. You may find that the change is causing your pipes to break, and you are unable to update them to the new fitting type.

The good news is that there is a solution to this issue. By removing the brand name from your fittings selection and opting instead for a generic fitting, you can make these updates without causing any damage to your pipes. Simply select a "sanitary tee" from the fitting list in the properties browser, and your pipes should update smoothly.
It's important to note that using the correct fittings is vital when it comes to waste pipe systems. If fittings are not installed correctly, the system may be prone to leaks and other issues, ultimately leading to costly repairs. By taking the time to choose the right fittings, you can ensure that your waste pipe system functions correctly and efficiently.
In summary, if you're having trouble changing your pipe fittings, make sure to remove any brand names from your selection and opt for a generic fitting instead. Additionally, taking care to select the right fittings for your waste pipe system can prevent issues down the road. By doing this, you can ensure your plumbing system runs smoothly and avoid costly repairs.