"Boomer" wrote in message ...
That is not a RO booster pump, you have the wrong one. That is a container pump. The
booster pump is the Aquatec CDP-8800 Booster Pump or 6800

Aquatec DDP-5800 Delivery Booster Pump (YOURS)

The DDP-5800 pumps can draw water from a ***holding tank and pressurize it***,
or boost the pressure from a low pressure source.

I remember reading this exactly text on their website...
The last part of the description about boosting pressure from a low pressure source
made me buy 5800 model and not look further... :-( I have low pressure source,
40PSI is low :-) and I need to boost it higher to 80PSI :-)))

Well, in this situation, I have one perfectly good DDP-5800 pump for sale