Fresh water pump

I recently installed a Shuflo pump to replace the Whale in-tank pump, I subsequently had trouble pumping all the fresh water from the tank, so I decided to look inside, the first picture shows the position of the pump which explains why I was unable to empty the tank.
The second picture shows the pump after I removed it, the brown stuff on the top is not sealant, its rust from the metal pipe clip, I would have expected stainless steel as it is immersed in water.
It would appear therefore if mine is the normal method of pump installation, that all the vans with in-tank pumps will also have a rusted clip polluting 
the water.

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I have seen both these problems reported on another thread. You would think A-S would know better.

A-S changed my Whale to a Shurflo under warranty or as a "good will gesture" as they called it, because my Whale Submersible had several problems and the Boiler feed, non return valve was fitted in the wrong position.

They said they would and had removed the Whale, whether they did or not I don't know, overall the standard of workmanship from the Service Center was very poor, it looked like a rush job with some minor damage to woodwork caused and screw covers left off which I found stuck to the EM40 Fuse cover.

Instead of moving the N/R valve which was preventing Boiler drain down, to the correct position, they fitted another in the correct position so unless I had known and pointed it out to them them the Boiler would still not have drained down.

Can parking our 2012 Nuevo EK motorhome on our sloping drive (front end uppermost) have a detrimental effect on the water pump? We've just had our pump replaced & the comment from the fitter suggested a scenario similar to the photos above.