Gate Valves Under Galley Sink

[CaptCG]

Hello All,
I am new to the Pearson 365 and have spent a few weeks learning the boat and systems. A question: The 3 gate valves mounted below the galley on the port side looking aft - are those for turning on/off the water from the 3 water tanks?  Pretty sure I know, just checking.  Should I leave them all on, or...?  Seems if I leave them on it would take longer to pressurize each time I use water.
Thanks,
Carl

[slokat]

They are coming from the three tanks, and going to the pump. Won't affect your pressure as the pump is pulling water through them.

Depending on situation, I usually have port & starboard valves open and hold the bow tank for reserve...

Lately, I have more stuff stored on starboard side, so I use that tank first, then port side.