Index: firmware/App/Controllers/DialysatePumps.h
===================================================================
diff -u -r830213bc6dcc1a684610caf78c79d55f2cb41e93 -rcceb0bf86fc6ddb1131701844960f59d968988c5
--- firmware/App/Controllers/DialysatePumps.h	(.../DialysatePumps.h)	(revision 830213bc6dcc1a684610caf78c79d55f2cb41e93)
+++ firmware/App/Controllers/DialysatePumps.h	(.../DialysatePumps.h)	(revision cceb0bf86fc6ddb1131701844960f59d968988c5)
@@ -7,8 +7,8 @@
 *
 * @file    DialysatePumps.h
 *
-* @author  (last)      Vinayakam Mani
-* @date    (last)      13-Nov-2025
+* @author  (last)      Sameer Kalliadan Poyil
+* @date    (last)      03-Feb-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  07-Oct-2024
@@ -32,8 +32,12 @@
 
 // ********** public definitions **********
 
-#define MIN_DIALYSATE_PUMP_RPM                  200                             ///< Minimum RPM target for dialysate pump (though zero is allowed if turning pump off).
-#define MAX_DIALYSATE_PUMP_RPM                  2650                            ///< Maximum RPM target for dialysate pump.
+#define MIN_DIALYSATE_PUMP_RPM                  200                             ///< Minimum RPM target for D12 pump and D48 Diener 2000 pump.
+#define MAX_DIALYSATE_PUMP_RPM                  2650                            ///< Maximum RPM target for D12 pump and D48 Diener 2000 pump.
+
+#define D48_DIENER_1000_MIN_RPM                 134                             ///< Minimum RPM for D48 Diener 1000 pump (test config enabled).
+#define D48_DIENER_1000_MAX_RPM                 2770                            ///< Maximum RPM for D48 Diener 1000 pump (test config enabled).
+
 #define DEGAS_PUMP_TARGET_PRES_ADJ_THRESHOLD    -1.0F                           ///< Dialysate Pump(D12) target pressure threshold adjustment factor.
 
 #define MIN_DIALYSATE_FLOW_RATE                 ( 100.0F )                      ///< Minimum dialysate flow rate
@@ -80,6 +84,8 @@
 void execDialysatePumpController( void );
 SELF_TEST_STATUS_T execDialysatePumpSelfTest( void );
 
+U32 getDialysatePumpMinRPM( DIALYSATE_PUMPS_T pumpId );
+U32 getDialysatePumpMaxRPM( DIALYSATE_PUMPS_T pumpId );
 F32 getDialysatePumpTargetSpeed( DIALYSATE_PUMPS_T pumpId );
 F32 getDialysatePumpMeasuredSpeed( DIALYSATE_PUMPS_T pumpId );
 F32 getDialysatePumpTargetPressure( DIALYSATE_PUMPS_T pumpId );