Okay that makes sense. I planned on using a buffer tank regardless for either. maybe 65 or 100 gal I’m not sure yet depending on what I find locally, for the bypass system and to ensure I get proper GPM in case if the customer has low GPM from the spigot. In theory, where the siding overlaps, what if I were to just agitate with a brush and cleaner and use low PSI To rinse? To ensure no water seeps behind the siding? I don’t know if that makes sense i am just trying to make this work as efficiently as possible ya know? I’m sure there are precautionary steps to take to prevent that? Thank you for your time I really appreciate it