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PRODUCT SPECIFICATIONS

DONSAN UD-1557

Source rating — not measured installation performanceRecorded rating (US gal/flush)Recorded rating: 1.1701.5
Chart generated from this record's EPA snapshot fields. Shared zero baseline; units shown above. This is not a measured flow or flush test.

Compare recorded specifications

Same source category and product or flush type. These are source-record comparisons, not compatible replacements or performance recommendations. Equal ratings do not make two models identical.

Historical EPA source fields; unknown values remain unknown
ParameterDONSAN UD-1557DONSAN UD-1736Premier 1034395American Standard 3471128.XXX
Source model nameWater ClosetWater ClosetNot suppliedHorizon
Rated flush volumevolume: 1.17 US gal/flushvolume: 1.23 US gal/flushvolume: 1.28 US gal/flushvolume: 1.28 US gal/flush
Flush typeSingleSingleSingleSingle
Source bowl model numberNot suppliedNot suppliedN2442EB3061101R.XXX
Source tank model numberNot suppliedNot suppliedN2442T4061428R.XXX
Flush mechanismGravityGravityGravityGravity

Model specifications

Recorded in the EPA directory snapshot of 2026-10-30
ParameterRecorded value
Brand as reportedDONSAN
Flush mechanismGravity
Flush typeSingle
Rated flush volumevolume: 1.17 US gal/flush
Source model nameWater Closet
Source model numberUD-1557

Full and reduced flush volumes remain separate. Counts of uses are needed to estimate consumption; compatibility and installation conditions are not provided.

Source: EPA WaterSense directory. Sources & Methods.

Other source models to examine

Same category and recorded type; these are navigation examples, not recommended substitutes or compatibility matches.

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