Heres how mine were done:Advantages- “aftermarket” this way you dont have to pull tanks to get pumps in/installed like BCB does them Two nuts off and the entire system comes out easily Easy access to a single pump if it needs repairDisadvantage- Gotta unscrew two nuts to change batteries or get to your pumps Lines somewhat in the way- They intentionally left them long so I could easily pull the entire assembly, set it aside, get to batteries and sump.[ C.O.D. Jr. III