Simple Chuck	DIC-020	DIW-20	DIC-10	DIW-10	DI-120
Volume***	400 gallons	300 gallons	300 gallons	150 gallons	150 gallons	150 gallons
Cost/Refill	$155.00	$119.00	$119.00	$72.00	$72.00	$69.00
Cost/Gallon	$0.39	$0.40	$0.40	$0.48	$0.48	$0.46
Wall-mounted	No	No	Yes	No	Yes	No
Portable	Yes	Yes	No	Yes	No	Yes

*** Estimated volume will depend of the TDS (Total Dissolved Solids) in your local water supply and system usage.