diff --git a/process/hcpb.py b/process/hcpb.py
index a5081119..c6abd913 100644
--- a/process/hcpb.py
+++ b/process/hcpb.py
@@ -569,7 +569,7 @@ def powerflow_calc(self, output: bool):
                 + fwbs_variables.pnucblkt
             )
             primary_pumping_variables.htpmw_fw_blkt = (
-                24.0 / 90.0 * fpump / (1 - fpump) * p_plasma
+                primary_pumping_variables.pump_factor * fpump / (1 - fpump) * p_plasma
             )
 
             # For divertor and shield, mechanical pumping power is a fraction of thermal
@@ -630,6 +630,13 @@ def powerflow_calc(self, output: bool):
                     primary_pumping_variables.htpmw_fw_blkt,
                     "OP ",
                 )
+                po.ovarre(
+                    self.outfile,
+                    "Pumping power for FW and Blanket multiplier factor",
+                    "(pump_factor)",
+                    primary_pumping_variables.pump_factor,
+                    "IP ",
+                )
                 po.ovarre(
                     self.outfile,
                     "Mechanical pumping power for divertor (MW)",
diff --git a/source/fortran/input.f90 b/source/fortran/input.f90
index 7f884432..a82aac8f 100644
--- a/source/fortran/input.f90
+++ b/source/fortran/input.f90
@@ -318,7 +318,7 @@ subroutine parse_input_file(in_file,out_file,show_changes)
     use pulse_variables, only: lpulse, dtstor, itcycl, istore, bctmp
 
     use primary_pumping_variables, only: t_in_bb, t_out_bb, dp_he, p_he, gamma_he, &
-      dp_fw_blkt, dp_fw, dp_blkt, dp_liq
+      dp_fw_blkt, dp_fw, dp_blkt, dp_liq, pump_factor
 
     use scan_module, only: isweep_2, nsweep, isweep, scan_dim, nsweep_2, &
       sweep_2, sweep, ipnscns, ipnscnv
@@ -2341,7 +2341,9 @@ subroutine parse_input_file(in_file,out_file,show_changes)
        case ('p_he')
           call parse_real_variable('p_he', p_he, 0.0D0, 100.0D6, &
               'Pressure in FW and blanket coolant at pump exit')
-
+       case ('pump_factor')
+            call parse_real_variable('pump_factor', pump_factor, 0.0D0, 10.0D0, &
+               'Pumping power for FW and Blanket multiplier factor')
        case ('gamma_he')
           call parse_real_variable('gamma_he', gamma_he, 1.0D0, 2.0D0, &
               'Ratio of specific heats for helium or for another Gas')
diff --git a/source/fortran/primary_pumping_variables.f90 b/source/fortran/primary_pumping_variables.f90
index 9ca8823d..90426483 100644
--- a/source/fortran/primary_pumping_variables.f90
+++ b/source/fortran/primary_pumping_variables.f90
@@ -50,6 +50,9 @@ module primary_pumping_variables
   !! mechanical pumping power for FW and blanket including heat exchanger and
   !! pipes (`primary_pumping=3`) [MW]
 
+  real(dp) :: pump_factor
+  !! Pumping power for FW and Blanket multiplier factor
+
   contains
 
   subroutine init_primary_pumping_variables
@@ -68,6 +71,7 @@ subroutine init_primary_pumping_variables
     dp_blkt = 3.5D3 ! Pa
     dp_liq = 1.0D7 ! Pa
     htpmw_fw_blkt = 0.0D0
+    pump_factor = 1.0D0
 
   end subroutine init_primary_pumping_variables