Hello Bill... I have both the pressure pump and a hand pump. My set-up is as follows:
Water filter to
One side of tee goes to my pressure system and the other (IMPORTANT!) has a shut off/one way valve, to the Whale brand hand pump.
The other side goes directly to the pressure pump that then goes to all points in the boat.
What I wish is that I'd installed a foot pump with salt water
in the galley
sink too -- to do pre-rinse of stuck on foods though frankly my bailing bucket on a rope
is okay (and free0
Contrary to popular lore, I use more water with the hand pump than my pressure system. With the 12-volt pump I can just barely nudge on the water but my hand pump puts out quite a gush.
Anyway, I like having both available -- though primarily (except for showers) the pressure system is off.
I use the same hose everywhere (well, I do have the red-thread hose for hot water) but essentially it's the same enforced hose that is standard for boats. When my tank is low the hand pump takes longer to bring up water. It pulls fine thru the $20 Home Depot house water filter (the 10" or so size) without any issues -- specifically, I do not believe you need that "special" (read: expensive) filter that Whale will be happy to sell you.