This pump offer a simple, cost effective way to boost the output of a tap water style RO-DI water purification system.
The pump offer rubber impellers in a cast iron housing with a 1/2hp pump motor.
This pump will reliably add 40psi to your tap water pressure.
IE have 35psi available, this boosts it to 75psi, add 40 psi to your tap water pressure.

Also used to pump water up taller building, every 10 ft of pole need 4.5psi of water pressure,
go up 50 ft and you consume 22psi in water pressure.