Index: firmware/App/Controllers/Valves.h
===================================================================
diff -u -r2cc657d123c9e6db79ed62b02f088c72ccf9ff98 -rae36722cb762a069233685bb62a63107fd80338e
--- firmware/App/Controllers/Valves.h	(.../Valves.h)	(revision 2cc657d123c9e6db79ed62b02f088c72ccf9ff98)
+++ firmware/App/Controllers/Valves.h	(.../Valves.h)	(revision ae36722cb762a069233685bb62a63107fd80338e)
@@ -31,15 +31,16 @@
 /// Enumeration of valves.
 typedef enum Valves
 {
-    VWI = 0,                                      ///< Valve (M4)
+    VWI = 0,                                      ///< Valve (M4 VWi)
     FIRST_VALVE = VWI,                            ///< First valve
-    VROD,                                         ///< Valve (P39)
-    VFF,                                          ///< Valve (P6)
-    VPI,                                          ///< Valve (P11)
-    VCR,                                          ///< Valve (P33)
-    VCB,                                          ///< Valve (P34)
-    VCD,                                          ///< Valve (P37)
-    VFB,                                          ///< Valve (M7)
+    VROD,                                         ///< Valve (P39 VROd)
+    VFF,                                          ///< Valve (P6 VFF)
+    VPI,                                          ///< Valve (P11 VPi)
+    VCR,                                          ///< Valve (P33 VCr)
+    VCB,                                          ///< Valve (P34 VCb)
+    VCD,                                          ///< Valve (P37 VCd)
+    VFB,                                          ///< Valve (M7 VFB)
+    SPP,                                          ///< Valve (P20 SPP)
     NUM_OF_VALVES                                 ///< Number of valves
 } VALVES_T;