diff --git a/services/taupct/current/app/src/agebd_taupct/service.py b/services/taupct/current/app/src/agebd_taupct/service.py
index ec2f515..2b0f9bb 100644
--- a/services/taupct/current/app/src/agebd_taupct/service.py
+++ b/services/taupct/current/app/src/agebd_taupct/service.py
@@ -3,7 +3,7 @@ from time import sleep
 import numpy as np
 from epics import dbr
 
-from agebd.pv import get_pv_class
+from agebd.pv import get_pv_class, get_pv_external_class
 from agebd.service.base import BaseService
 from agebd.service.pvs import BasePVs
 from agebd.utils import printgetversion
@@ -11,6 +11,7 @@ from agebd.utils import printgetversion
 __version__ = printgetversion(__file__)
 
 PV = get_pv_class()
+PV_EXTERNAL = get_pv_external_class()
 
 
 class PVs(BasePVs):
@@ -26,15 +27,14 @@ class PVs(BasePVs):
     inj_rate_err = PV("AGEBD-TAUPCT:INJRATE-ERR.VAL")
 
     ## Service specific PVs from other IOCs
-    inj_active = PV("AGEBD-PARAMS:INJECTION-ACTIVE.VAL")
-    dump_valve = PV("ARS01-VVPG-0210:PLC_STATUS.VAL")
+    inj_active = PV_EXTERNAL("AGEBD-PARAMS:INJECTION-ACTIVE.VAL")
+    dump_valve = PV_EXTERNAL("ARS01-VVPG-0210:PLC_STATUS.VAL")
 
     def __init__(self, service_name: str, pv_factory=PV):
         super().__init__(service_name, pv_factory)
-        PV = pv_factory
 
-        self.CallbackPV = PV("ARS07-CECL-DPCT0:CURR.VAL", auto_monitor=dbr.DBE_VALUE)
-        # CallbackPV = PV('ARS07-DPCT-0000:AVG-CURR.VAL', auto_monitor = dbr.DBE_VALUE)
+        self.CallbackPV = PV_EXTERNAL("ARS07-CECL-DPCT0:CURR.VAL", auto_monitor=dbr.DBE_VALUE)
+        # CallbackPV = PV_EXTERNAL('ARS07-DPCT-0000:AVG-CURR.VAL', auto_monitor = dbr.DBE_VALUE)
         # ARS07-DPCT-0000:CURR (5 Hz, i.e., dt = 0.2 s)
         # ARS07-DPCT-0000:AVG-CURR (5 Hz, i.e., dt = 0.2 s)