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First a "history lesson": Years ago, pumps didn't have any "regulated pressure" capability. The pump would run and supply water, when the pressure was reached, the pump would turn off, then immediately turn back on when the pressure dropped. That caused "surging" or "up and down pressure". The accumulator tank solved that problem and "back in the day" tanks were a "standard feature" on all "upscale RV's.
Fast forward to today: Pumps are "speed/volume regulated to prevent surging, so the accumulator tank is no longer "necessary" to keep a constant water flow when showering. Many people still "like the storage capacity" of the accumulator tank, mainly so the pump won't turn on (make noise) during a "night time flush". Otherwise, the accumulator tank doesn't serve a functional purpose like it did "back in the day"....
From my perspective (for what it's worth), a tank isn't "necessary", but it will stop pump cycling with "limited water use" such as a quick flush or a small cup of water to take meds, etc. Functionally, there's no significant difference in performance with or without the tank in today's variable speed/volume pumps.
Installing on is more a personal preference than a necessity with modern RV's.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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