The only ones who I know who do use “chemicals” are the misfits who dabble in the trades pushing chemicals on the unsuspecting public to make extra money for their lack of skills.
There are some Boiler chemicals and cooling towers that are used to prevent fouling of drainage and condensate lines.
Most of the chemicals sold over the counter either contain sulfuric acid Or lye and neither one is great for older piping systems or peoples pets or eyes or the environment Good luck sorry if this doesnt help
Your reply really got me thinking, even though Marcie wentto bed I checked this for her, and maybe I can see if she would like to change venu, for I think Which is better for your clogged pipes and the enviroment, chemicals or machine? again Thank you for taking the time to answer a little girls question! Bry