My home is raised an entire story off the ground with the garage underneath. I would like to add a utility sink in the work area and I think I have found a suitable location. I recently moved my water heater and put in new PEX pipe coming out of the ceiling and into the WH. Close by there is what I think is my main drain going to the sewer
- it is a 4"+ pipe (labeled not suitable for pressure) that has 2 main pipes coming into it from the ceiling. Can I run a cold and hot line off the inputs to my WH and just tap into that drain for the sink? If so, what are best practices for going from a standard drain to a larger drain pipe?
Thanks in advance.