It is a pretty common complaint almost universally. The solution is to install a Accumulator tank in the water line near the pump as possible.
Do a search on this or most any rv forum and you will find plenty of threads and pictures.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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