diff --git a/src/app/calculators/lechapt-calmon/lechapt-calmon.en.json b/src/app/calculators/lechapt-calmon/lechapt-calmon.en.json
index 983b3941249649334ce353338a0d453194f6e953..47b3a9b00faeaab095e1c60c8a544e5662bce852 100644
--- a/src/app/calculators/lechapt-calmon/lechapt-calmon.en.json
+++ b/src/app/calculators/lechapt-calmon/lechapt-calmon.en.json
@@ -10,6 +10,9 @@
     "select_material_7": "PVC - Polyethylene",
     "select_material_8": "Hydraulically smooth pipe - 0.05 ≤ D ≤ 0.2",
     "select_material_9": "Hydraulically smooth pipe - 0.25 ≤ D ≤ 1",
+    "L": "L",
+    "M": "M",
+    "N": "N",
     "fs_hydraulique": "Hydraulic features",
     "Q": "Flow",
     "D": "Pipe diameter",
diff --git a/src/app/calculators/lechapt-calmon/lechapt-calmon.fr.json b/src/app/calculators/lechapt-calmon/lechapt-calmon.fr.json
index 81976f36abb93e57fbf1ec54130d2be5dd29d26c..f3b6465da14b5fe31e8f0752672a27f472f9e096 100644
--- a/src/app/calculators/lechapt-calmon/lechapt-calmon.fr.json
+++ b/src/app/calculators/lechapt-calmon/lechapt-calmon.fr.json
@@ -10,6 +10,9 @@
     "select_material_7": "PVC - Polyéthylène",
     "select_material_8": "Tuyau hydrauliquement lisse - 0.05 ≤ D ≤ 0.2",
     "select_material_9": "Tuyau hydrauliquement lisse - 0.25 ≤ D ≤ 1",
+    "L": "L",
+    "M": "M",
+    "N": "N",
     "fs_hydraulique": "Caractéristiques hydrauliques",
     "Q": "Débit",
     "D": "Diamètre du tuyau",
diff --git a/src/app/components/calculator-results/calculator-results.component.ts b/src/app/components/calculator-results/calculator-results.component.ts
index 64e5ff7558d5c2cb76bc84deee3b8ced6ef995cf..70c923d706fe1308600a51cdc10b94c8234697ff 100644
--- a/src/app/components/calculator-results/calculator-results.component.ts
+++ b/src/app/components/calculator-results/calculator-results.component.ts
@@ -156,11 +156,12 @@ export class CalculatorResultsComponent {
         let res = "";
         if (displaySymbol)
             res += p.symbol;
-        if (p.label != undefined && p.label != "") {
-            if (res.length > 0)
-                res += ":";
-            res += p.label;
-        }
+        if (p.label != undefined && p.label != "")
+            if (p.symbol != p.label || !displaySymbol) {
+                if (res.length > 0)
+                    res += ":";
+                res += p.label;
+            }
         if (p.unit != undefined && p.unit != "")
             res += " (" + p.unit + ")";
         return res;