The pump that came with our AS - bought used there years old at the time - was Aquajet or some similar name. Since day one it was extremely noisy and flow was poor - like me in my aging years!
Eventually it stopped working alltogether, so it could have been defective from the time we bought the trailer.
I picked up a Shurflow pump from a local RV dealer and installed it, and the comparison was like night and day. We can barely hear the pump running, but the flow is pretty much equal to that of the city water connection.
Brian & Connie Mitchell
2005 Classic 30'
Hensley Arrow / Centramatics
2008 GMC Sierra SLT 2500HD,4x4,Crew Cab, Diesel, Leer cap.