Parts List:

Aqualift pump: $10 (F&S)
1/4" Tubing: $2
JG 1/4 Tee - $5
Float Valve: $15
Reservoir: Rubbermaid Tub

Optional: For topping off the reservoir as needed without contant on/off of RO/DI unit.
Additional Float Valve in reservoir
JG ball valve