We are currently using the Jabsco VFLO 5.0 series: constant-pressure variable-speed 5.0gpm/19lpm pumps,. No accumulator.
Quiet in operation.
Series ID: 42755-0x9y
Model numbers ending 0x94are 24V; those ending 0x92 are 12V
42755-0094 running @ 40 PSI; Cut-out: 60 PSI
42755-0394 running @ 25psi (1.7bar) Cut-out: 35psi (2.4bar)
We use the -0394