What are the reasons you choose the 4901-4292/4282? It seems the 3901 is basically the same, just a little less GPM's...and this is only used in the sink (rarely) and fresh water shower (even more rarely), plus anythings gotta be an upgrade over this old one :lolhit:

Thanks again for the help!

Just an update mostly for anyone searching in the future...

Installed the Shurflo 3901-2214 and it seems to work perfectly, at least from the little testing I did Saturday.

Jim thanks again for the help!

My pleasure, better pressure and quieter now. we painted one of the five, yesterday and today. Wow that is alot of work.