Sub-Zero DEU1550I vs Viking Professional FPIM5151

Last updated: November 2, 2026

The Viking Professional FPIM5151 is the better undercounter ice maker overall, rated 3.5 to 3.1. The Viking Professional FPIM5151 leads on drain and warranty. The Sub-Zero DEU1550I costs $69 less ($5,430 vs $5,499).

Sub-Zero DEU1550I vs Viking Professional FPIM5151

Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every 15 in wide undercounter ice maker; a clear win is highlighted. How we rank explains each one.

Factor weightViking Professional FPIM5151Sub-Zero DEU1550I
Overall rating3.5/53.1/5
Value 30%20 $84.60 per lb a day ($5,499, 65 lb a day)20 $83.54 per lb a day ($5,430, 65 lb a day)
Output 15%73 65 lb of ice a day73 65 lb of ice a day
Energy use 10%50 energy use not published (neutral score used)50 energy use not published (neutral score used)
Storage 10%80 26 lb of storage75 25 lb of storage
Warranty 25%67 2 years on the unit, 6 years on the sealed system58 2 years on the unit, 5 years on the sealed system
Drain 10%100 drain pump included30 gravity drain only, needs a floor drain

Specifications

Viking Professional FPIM5151Sub-Zero DEU1550I
Ice
Ice typeClearClear
Ice a day65 lb65 lb
Bin storage26 lb25 lb
Install
Width14.9 in15 in
Height33.9 in34.5 in
Depth22 in23.1 in
DrainPump includedGravity only
Outdoor ratedYesYes
Panel readyYesYes
App or remote monitoring-Yes
Warranty
Unit warranty2 years2 years
Sealed system warranty6 years5 years
Released-2026-06

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