Larger
Head is a Lavac with a manual Henderson pump.
Pumps to top of tank. Tank drains by gravity
Tank is about 45" high
The vertical line holds water that dribbles back to the head bowl, so it is best to pump enough clean water so that no messy stuff comes back
System has been good over 8 years of 6 month per year live aboard
Replaced the pump last year. Old pump is fine now after pickling in acid for a month or so
We put some weak hydrochloric acid in the system every year.
Had to physically remove hoses last year for first time and about 1/4" hard brown scale fell out with a little pounding and cussing
whenever possible, pump lots of water thru