Keystone does not do an "excellent job of cleaning waste construction particles" from their trailers during assembly. There is likely to be 10-20 pounds of sawdust, wire insulation, PEX tubing, or other debris in your trailer. There will also be quite a bit of plastic shavings inside all of the tanks. The fresh water tank will have "junk in it"....
You can buy a "suction tube strainer" for your water pump. It fits in the suction line/water pump inlet fitting" and protects the pump head from anything that might be in the fresh water tank.
If you have a "snap fitting FloJet pump" this is the one that fits. If you have a Shure Flo pump, the fittings are different, so you'll need to find the one that fits your pump.
Straining the water going into the pump has "saved our pump head" several times.
Here's a link to one source. IMHO, it's the best $8 you could spend to insure you protect your water pump.
https://www.amazon.com/Flojet-017403...3941452&sr=8-2