Not that Forest River has standardized where various components are, different floor plans may dictate where they have as choices, however.......on my 2010 330TS model, the water pump is located right beside where the on board fresh water storage tank is. On our rig, that's inside one of the cargo doors on the right rear of the motorhome. The actual water tank and pump are blocked from view by a plastic wall to protect them from any cargo items in the compartment. The wall can be removed by removing various wood screws.
Good luck!
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Ken and Terry
2018 Sunseeker 2430S-CD, nicely modified and carried by a 2017 Ford E450 Sport
Former Georgetown 330TS owner for 10 years with more mods than I can count, pushed by our 2017 GMC Terrain