I did not use the "herbie" plumbing method (and not sure if that really matters) but based on experience from a family member, we decided to use gate valve on at least the primary drain so we could better control the flow and noise. I used a ball valve fully opened for my second drain (no valve for third beanianimal). The gate valve does not cost that much more than ball valve so I still think it was a good idea for my implementation...something for you to consider too.