My plumber and contractor bought all staff for building an ADU.They started the job,but there was so messy, After a month I decided not to continue the job with the guys and chose another company. I returned the remaining parts,somebody in warehouse told me: they are dirty and need to be cleaned,I cleaned them and bought them again,they refused to take them back and just returned a few parts. I don’t recommend you to go and buy them if you might change your mind and want another contractor.