diff --git a/datatypes/epc/domain/mapper.py b/datatypes/epc/domain/mapper.py
index 5c15917c4..31be5a966 100644
--- a/datatypes/epc/domain/mapper.py
+++ b/datatypes/epc/domain/mapper.py
@@ -6603,6 +6603,7 @@ def _pashub_community_heating(
 # convention (issue #1590 bug 6).
 _PASHUB_CYLINDER_SIZE_TO_SAP10: Dict[str, int] = {
     "Normal (90-130 litres)": 2,
+    "Medium (131-170 litres)": 3,  # Table 28 Medium → fixed 160 L
     "Large (>170 litres)": 4,
 }