diff --git a/lib/WiFiManagerParameters/CheckboxParameter.h b/lib/WiFiManagerParameters/CheckboxParameter.h
new file mode 100644
index 0000000..7392ca2
--- /dev/null
+++ b/lib/WiFiManagerParameters/CheckboxParameter.h
@@ -0,0 +1,29 @@
+#pragma once
+#include <WiFiManager.h>
+
+class CheckboxParameter : public WiFiManagerParameter {
+public:
+  const char* checked = "type=\"checkbox\" checked";
+  const char* noChecked = "type=\"checkbox\"";
+  const char* trueVal = "T";
+
+  CheckboxParameter(const char* id, const char* label, bool value) : WiFiManagerParameter("") {
+    init(id, label, String(value ? trueVal : "0").c_str(), 1, "", WFM_LABEL_AFTER);
+  }
+
+  const char* getValue() const override {
+    return trueVal;
+  }
+
+  void setValue(bool value) {
+    WiFiManagerParameter::setValue(value ? trueVal : "0", 1);
+  }
+
+  const char* getCustomHTML() const override {
+    return strcmp(WiFiManagerParameter::getValue(), trueVal) == 0 ? checked : noChecked;
+  }
+
+  bool getCheckboxValue() {
+    return strcmp(WiFiManagerParameter::getValue(), trueVal) == 0 ? true : false;
+  }
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/DoubleParameter.h b/lib/WiFiManagerParameters/DoubleParameter.h
new file mode 100644
index 0000000..8e18f98
--- /dev/null
+++ b/lib/WiFiManagerParameters/DoubleParameter.h
@@ -0,0 +1,21 @@
+#pragma once
+#include <WiFiManager.h>
+
+class DoubleParameter : public WiFiManagerParameter {
+public:
+  DoubleParameter(const char* id, const char* label, double value, const uint8_t length = 10) : WiFiManagerParameter("") {
+    init(id, label, String(value, length - 1).c_str(), length, "", WFM_LABEL_DEFAULT);
+  }
+
+  double getValue() {
+    return atof(WiFiManagerParameter::getValue());
+  }
+
+  void setValue(double value, int length) {
+    WiFiManagerParameter::setValue(String(value, length - 1).c_str(), length);
+  }
+
+  void setValue(double value) {
+    setValue(value, getValueLength());
+  }
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/IntParameter.h b/lib/WiFiManagerParameters/IntParameter.h
new file mode 100644
index 0000000..9989acf
--- /dev/null
+++ b/lib/WiFiManagerParameters/IntParameter.h
@@ -0,0 +1,21 @@
+#pragma once
+#include <WiFiManager.h>
+
+class IntParameter : public WiFiManagerParameter {
+public:
+  IntParameter(const char* id, const char* label, int value, const uint8_t length = 10) : WiFiManagerParameter("") {
+    init(id, label, String(value).c_str(), length, "", WFM_LABEL_DEFAULT);
+  }
+
+  int getValue() {
+    return atoi(WiFiManagerParameter::getValue());
+  }
+
+  void setValue(int value, int length) {
+    WiFiManagerParameter::setValue(String(value).c_str(), length);
+  }
+
+  void setValue(int value) {
+    setValue(value, getValueLength());
+  }
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/SeparatorParameter.h b/lib/WiFiManagerParameters/SeparatorParameter.h
new file mode 100644
index 0000000..292cb53
--- /dev/null
+++ b/lib/WiFiManagerParameters/SeparatorParameter.h
@@ -0,0 +1,8 @@
+#pragma once
+#include <WiFiManager.h>
+
+
+class SeparatorParameter : public WiFiManagerParameter {
+public:
+  SeparatorParameter() : WiFiManagerParameter("<hr>") {}
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/ShortParameter.h b/lib/WiFiManagerParameters/ShortParameter.h
new file mode 100644
index 0000000..a378da0
--- /dev/null
+++ b/lib/WiFiManagerParameters/ShortParameter.h
@@ -0,0 +1,21 @@
+#pragma once
+#include <WiFiManager.h>
+
+class ShortParameter : public WiFiManagerParameter {
+public:
+  ShortParameter(const char* id, const char* label, short value, const uint8_t length = 10) : WiFiManagerParameter("") {
+    init(id, label, String(value).c_str(), length, "", WFM_LABEL_DEFAULT);
+  }
+
+  short getValue() {
+    return atoi(WiFiManagerParameter::getValue());
+  }
+
+  void setValue(short value, int length) {
+    WiFiManagerParameter::setValue(String(value).c_str(), length);
+  }
+
+  void setValue(short value) {
+    setValue(value, getValueLength());
+  }
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/UnsignedIntParameter.h b/lib/WiFiManagerParameters/UnsignedIntParameter.h
new file mode 100644
index 0000000..c5d7720
--- /dev/null
+++ b/lib/WiFiManagerParameters/UnsignedIntParameter.h
@@ -0,0 +1,21 @@
+#pragma once
+#include <WiFiManager.h>
+
+class UnsignedIntParameter : public WiFiManagerParameter {
+public:
+  UnsignedIntParameter(const char* id, const char* label, unsigned int value, const uint8_t length = 10) : WiFiManagerParameter("") {
+    init(id, label, String(value).c_str(), length, "", WFM_LABEL_DEFAULT);
+  }
+
+  unsigned int getValue() {
+    return (unsigned int) atoi(WiFiManagerParameter::getValue());
+  }
+
+  void setValue(unsigned int value, int length) {
+    WiFiManagerParameter::setValue(String(value).c_str(), length);
+  }
+
+  void setValue(unsigned int value) {
+    setValue(value, getValueLength());
+  }
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/UnsignedShortParameter.h b/lib/WiFiManagerParameters/UnsignedShortParameter.h
new file mode 100644
index 0000000..7e702b3
--- /dev/null
+++ b/lib/WiFiManagerParameters/UnsignedShortParameter.h
@@ -0,0 +1,21 @@
+#pragma once
+#include <WiFiManager.h>
+
+class UnsignedShortParameter : public WiFiManagerParameter {
+public:
+  UnsignedShortParameter(const char* id, const char* label, unsigned short value, const uint8_t length = 10) : WiFiManagerParameter("") {
+    init(id, label, String(value).c_str(), length, "", WFM_LABEL_DEFAULT);
+  }
+
+  unsigned short getValue() {
+    return (unsigned short) atoi(WiFiManagerParameter::getValue());
+  }
+
+  void setValue(unsigned short value, int length) {
+    WiFiManagerParameter::setValue(String(value).c_str(), length);
+  }
+
+  void setValue(unsigned short value) {
+    setValue(value, getValueLength());
+  }
+};
\ No newline at end of file
diff --git a/lib/WiFiManagerParameters/WiFiManagerParameters.h b/lib/WiFiManagerParameters/WiFiManagerParameters.h
deleted file mode 100644
index cbe916b..0000000
--- a/lib/WiFiManagerParameters/WiFiManagerParameters.h
+++ /dev/null
@@ -1,88 +0,0 @@
-class IntParameter : public WiFiManagerParameter {
-public:
-  IntParameter(const char* id, const char* label, int value, const uint8_t length = 10) : WiFiManagerParameter("") {
-    init(id, label, String(value).c_str(), length, "", WFM_LABEL_DEFAULT);
-  }
-
-  int getValue() {
-    return atoi(WiFiManagerParameter::getValue());
-  }
-
-  void setValue(int value, int length) {
-    WiFiManagerParameter::setValue(String(value).c_str(), length);
-  }
-
-  void setValue(int value) {
-    setValue(value, getValueLength());
-  }
-};
-
-class UnsignedIntParameter : public WiFiManagerParameter {
-public:
-  UnsignedIntParameter(const char* id, const char* label, unsigned int value, const uint8_t length = 10) : WiFiManagerParameter("") {
-    init(id, label, String(value).c_str(), length, "", WFM_LABEL_DEFAULT);
-  }
-
-  unsigned int getValue() {
-    return (unsigned int) atoi(WiFiManagerParameter::getValue());
-  }
-
-  void setValue(unsigned int value, int length) {
-    WiFiManagerParameter::setValue(String(value).c_str(), length);
-  }
-
-  void setValue(unsigned int value) {
-    setValue(value, getValueLength());
-  }
-};
-
-class DoubleParameter : public WiFiManagerParameter {
-public:
-  DoubleParameter(const char* id, const char* label, double value, const uint8_t length = 10) : WiFiManagerParameter("") {
-    init(id, label, String(value, length - 1).c_str(), length, "", WFM_LABEL_DEFAULT);
-  }
-
-  double getValue() {
-    return atof(WiFiManagerParameter::getValue());
-  }
-
-  void setValue(double value, int length) {
-    WiFiManagerParameter::setValue(String(value, length - 1).c_str(), length);
-  }
-
-  void setValue(double value) {
-    setValue(value, getValueLength());
-  }
-};
-
-class CheckboxParameter : public WiFiManagerParameter {
-public:
-  const char* checked = "type=\"checkbox\" checked";
-  const char* noChecked = "type=\"checkbox\"";
-  const char* trueVal = "T";
-
-  CheckboxParameter(const char* id, const char* label, bool value) : WiFiManagerParameter("") {
-    init(id, label, String(value ? trueVal : "0").c_str(), 1, "", WFM_LABEL_AFTER);
-  }
-
-  const char* getValue() const override {
-    return trueVal;
-  }
-
-  void setValue(bool value) {
-    WiFiManagerParameter::setValue(value ? trueVal : "0", 1);
-  }
-
-  const char* getCustomHTML() const override {
-    return strcmp(WiFiManagerParameter::getValue(), trueVal) == 0 ? checked : noChecked;
-  }
-
-  bool getCheckboxValue() {
-    return strcmp(WiFiManagerParameter::getValue(), trueVal) == 0 ? true : false;
-  }
-};
-
-class SeparatorParameter : public WiFiManagerParameter {
-public:
-  SeparatorParameter() : WiFiManagerParameter("<hr>") {}
-};
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index 9d9b681..20c7c2d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -13,7 +13,8 @@ framework = arduino
 lib_deps = 
 	;arduino-libraries/NTPClient@^3.2.1
 	bblanchon/ArduinoJson@^6.20.0
-	ihormelnyk/OpenTherm Library@^1.1.4
+	;ihormelnyk/OpenTherm Library@^1.1.4
+	https://github.com/Laxilef/opentherm_library/archive/refs/heads/master.zip
 	knolleary/PubSubClient@^2.8
 	bblanchon/StreamUtils@^1.7.3
 	lennarthennigs/ESP Telnet@^2.1.2
@@ -31,7 +32,7 @@ build_flags =
 	-D USE_TELNET=1
 upload_speed = 921600
 monitor_speed = 115200
-version = 1.3.4
+version = 1.4.0
 
 ; Defaults
 [esp8266_defaults]
@@ -167,7 +168,7 @@ build_flags =
 	;-D DEBUG_BY_DEFAULT=1
 	;-D WM_DEBUG_MODE=3
 
-[env:wemos_d1_mini32]
+[env:d1_mini32]
 platform = ${esp32_defaults.platform}
 board = wemos_d1_mini32
 lib_deps = ${esp32_defaults.lib_deps}
diff --git a/src/MainTask.h b/src/MainTask.h
index cd9cda1..ee49234 100644
--- a/src/MainTask.h
+++ b/src/MainTask.h
@@ -14,12 +14,19 @@ public:
   MainTask(bool _enabled = false, unsigned long _interval = 0) : Task(_enabled, _interval) {}
 
 protected:
+  const static byte REASON_PUMP_START_HEATING = 1;
+  const static byte REASON_PUMP_START_ANTISTUCK = 2;
+
   Blinker* blinker = nullptr;
   unsigned long lastHeapInfo = 0;
   unsigned long firstFailConnect = 0;
   unsigned int heapSize = 0;
   unsigned int minFreeHeapSize = 0;
   unsigned long restartSignalTime = 0;
+  bool heatingEnabled = false;
+  unsigned long heatingDisabledTime = 0;
+  byte externalPumpStartReason;
+  unsigned long externalPumpStartTime = 0;
 
   const char* getTaskName() {
     return "Main";
@@ -38,6 +45,7 @@ protected:
       pinMode(LED_STATUS_PIN, OUTPUT);
       digitalWrite(LED_STATUS_PIN, false);
     #endif
+    pinMode(settings.externalPump.pin, OUTPUT);
 
     #if defined(ESP32)
       heapSize = ESP.getHeapSize();
@@ -107,9 +115,9 @@ protected:
 
     #ifdef LED_STATUS_PIN
       ledStatus(LED_STATUS_PIN);
-      yield();
     #endif
     heap();
+    externalPump();
 
     // anti memory leak
     if (Log.lock()) {
@@ -207,4 +215,67 @@ protected:
 
     this->blinker->tick();
   }
+
+  void externalPump() {
+    if (!vars.states.heating && this->heatingEnabled) {
+      this->heatingEnabled = false;
+      this->heatingDisabledTime = millis();
+
+    } else if (vars.states.heating && !this->heatingEnabled) {
+      this->heatingEnabled = true;
+    }
+
+    if (!settings.externalPump.use) {
+      if (vars.externalPump.enable) {
+        digitalWrite(settings.externalPump.pin, false);
+
+        vars.externalPump.enable = false;
+        vars.externalPump.lastEnableTime = millis();
+
+        Log.sinfoln("EXTPUMP", F("Disabled: use = off"));
+      }
+
+      return;
+    }
+
+    if (vars.externalPump.enable && !this->heatingEnabled) {
+      if (this->externalPumpStartReason == MainTask::REASON_PUMP_START_HEATING && millis() - this->heatingDisabledTime > settings.externalPump.postCirculationTime) {
+        digitalWrite(settings.externalPump.pin, false);
+
+        vars.externalPump.enable = false;
+        vars.externalPump.lastEnableTime = millis();
+
+        Log.sinfoln("EXTPUMP", F("Disabled: expired post circulation time"));
+
+      } else if (this->externalPumpStartReason == MainTask::REASON_PUMP_START_ANTISTUCK && millis() - this->externalPumpStartTime >= settings.externalPump.antiStuckTime) {
+        digitalWrite(settings.externalPump.pin, false);
+
+        vars.externalPump.enable = false;
+        vars.externalPump.lastEnableTime = millis();
+
+        Log.sinfoln("EXTPUMP", F("Disabled: expired anti stuck time"));
+      }
+
+    } else if (vars.externalPump.enable && this->heatingEnabled && this->externalPumpStartReason == MainTask::REASON_PUMP_START_ANTISTUCK) {
+      this->externalPumpStartReason = MainTask::REASON_PUMP_START_HEATING;
+
+    } else if (!vars.externalPump.enable && this->heatingEnabled) {
+      vars.externalPump.enable = true;
+      this->externalPumpStartTime = millis();
+      this->externalPumpStartReason = MainTask::REASON_PUMP_START_HEATING;
+
+      digitalWrite(settings.externalPump.pin, true);
+
+      Log.sinfoln("EXTPUMP", F("Enabled: heating on"));
+
+    } else if (!vars.externalPump.enable && millis() - vars.externalPump.lastEnableTime >= settings.externalPump.antiStuckInterval) {
+      vars.externalPump.enable = true;
+      this->externalPumpStartTime = millis();
+      this->externalPumpStartReason = MainTask::REASON_PUMP_START_ANTISTUCK;
+
+      digitalWrite(settings.externalPump.pin, true);
+
+      Log.sinfoln("EXTPUMP", F("Enabled: anti stuck"));
+    }
+  }
 };
\ No newline at end of file
diff --git a/src/OpenThermTask.h b/src/OpenThermTask.h
index f521837..99822e6 100644
--- a/src/OpenThermTask.h
+++ b/src/OpenThermTask.h
@@ -55,11 +55,6 @@ protected:
       pinMode(LED_OT_RX_PIN, OUTPUT);
       digitalWrite(LED_OT_RX_PIN, false);
     #endif
-
-    #ifdef HEATING_STATUS_PIN
-      pinMode(HEATING_STATUS_PIN, OUTPUT);
-      digitalWrite(HEATING_STATUS_PIN, false);
-    #endif
   }
 
   void loop() {
@@ -127,10 +122,6 @@ protected:
       prevUpdateNonEssentialVars = 0;
       vars.parameters.heatingEnabled = heatingEnabled;
       Log.sinfoln(FPSTR(S_OT_HEATING), "%s", heatingEnabled ? F("Enabled") : F("Disabled"));
-
-      #ifdef HEATING_STATUS_PIN
-        digitalWrite(HEATING_STATUS_PIN, heatingEnabled);
-      #endif
     }
 
     vars.states.heating = ot->isCentralHeatingActive(localResponse);
diff --git a/src/Settings.h b/src/Settings.h
index 0a6da03..6e34f50 100644
--- a/src/Settings.h
+++ b/src/Settings.h
@@ -79,6 +79,14 @@ struct Settings {
     } indoor;
   } sensors;
 
+  struct {
+    bool use = false;
+    byte pin = EXT_PUMP_PIN_DEFAULT;
+    unsigned short postCirculationTime = 600;
+    unsigned int antiStuckInterval = 2592000;
+    unsigned short antiStuckTime = 300;
+  } externalPump;
+
   char validationValue[8] = SETTINGS_VALID_VALUE;
 } settings;
 
@@ -113,6 +121,11 @@ struct Variables {
     float dhw = 0.0f;
   } temperatures;
 
+  struct {
+    bool enable = false;
+    unsigned long lastEnableTime = 0;
+  } externalPump;
+
   struct {
     bool heatingEnabled = false;
     byte heatingMinTemp = DEFAULT_HEATING_MIN_TEMP;
diff --git a/src/WifiManagerTask.h b/src/WifiManagerTask.h
index 5a763b1..659c595 100644
--- a/src/WifiManagerTask.h
+++ b/src/WifiManagerTask.h
@@ -1,6 +1,9 @@
 #define WM_MDNS
 #include <WiFiManager.h>
-#include <WiFiManagerParameters.h>
+#include <UnsignedIntParameter.h>
+#include <UnsignedShortParameter.h>
+#include <CheckboxParameter.h>
+#include <SeparatorParameter.h>
 #include <netif/etharp.h>
 
 WiFiManager wm;
@@ -11,6 +14,7 @@ WiFiManagerParameter* wmMqttUser;
 WiFiManagerParameter* wmMqttPassword;
 WiFiManagerParameter* wmMqttPrefix;
 UnsignedIntParameter* wmMqttPublishInterval;
+
 UnsignedIntParameter* wmOtInPin;
 UnsignedIntParameter* wmOtOutPin;
 UnsignedIntParameter* wmOtMemberIdCode;
@@ -21,11 +25,17 @@ CheckboxParameter* wmOtHeatingCh1ToCh2;
 CheckboxParameter* wmOtDhwToCh2;
 CheckboxParameter* wmOtDhwBlocking;
 CheckboxParameter* wmOtModSyncWithHeating;
+
 UnsignedIntParameter* wmOutdoorSensorPin;
 UnsignedIntParameter* wmIndoorSensorPin;
 
-SeparatorParameter* wmSep1;
-SeparatorParameter* wmSep2;
+CheckboxParameter* wmExtPumpUse;
+UnsignedIntParameter* wmExtPumpPin;
+UnsignedShortParameter* wmExtPumpPostCirculationTime;
+UnsignedIntParameter* wmExtPumpAntiStuckInterval;
+UnsignedShortParameter* wmExtPumpAntiStuckTime;
+
+SeparatorParameter* wmSep;
 
 extern EEManager eeSettings;
 #if USE_TELNET
@@ -37,7 +47,7 @@ class WifiManagerTask : public Task {
 public:
   WifiManagerTask(bool _enabled = false, unsigned long _interval = 0) : Task(_enabled, _interval) {}
 
-  WifiManagerTask* addTaskForDisable(Task* task) {
+  WifiManagerTask* addTaskForDisable(AbstractTask* task) {
     this->tasksForDisable.push_back(task);
     return this;
   }
@@ -45,7 +55,7 @@ public:
 protected:
   bool connected = false;
   unsigned long lastArpGratuitous = 0;
-  std::vector<Task*> tasksForDisable;
+  std::vector<AbstractTask*> tasksForDisable;
 
   const char* getTaskName() {
     return "WifiManager";
@@ -77,6 +87,8 @@ protected:
     std::vector<const char *> menu = {"custom", "wifi", "param", "sep", "info", "update", "restart"};
     wm.setMenu(menu);
 
+    wmSep = new SeparatorParameter();
+
     wmHostname = new WiFiManagerParameter("hostname", "Hostname", settings.hostname, 80);
     wm.addParameter(wmHostname);
 
@@ -98,8 +110,7 @@ protected:
     wmMqttPublishInterval = new UnsignedIntParameter("mqtt_publish_interval", "MQTT publish interval", settings.mqtt.interval, 5);
     wm.addParameter(wmMqttPublishInterval);
 
-    wmSep1 = new SeparatorParameter();
-    wm.addParameter(wmSep1);
+    wm.addParameter(wmSep);
 
     wmOtInPin = new UnsignedIntParameter("ot_in_pin", "Opentherm GPIO IN", settings.opentherm.inPin, 2);
     wm.addParameter(wmOtInPin);
@@ -131,8 +142,7 @@ protected:
     wmOtModSyncWithHeating = new CheckboxParameter("ot_mod_sync_with_heating", "Modulation sync with heating", settings.opentherm.modulationSyncWithHeating);
     wm.addParameter(wmOtModSyncWithHeating);
 
-    wmSep2 = new SeparatorParameter();
-    wm.addParameter(wmSep2);
+    wm.addParameter(wmSep);
 
     wmOutdoorSensorPin = new UnsignedIntParameter("outdoor_sensor_pin", "Outdoor sensor GPIO", settings.sensors.outdoor.pin, 2);
     wm.addParameter(wmOutdoorSensorPin);
@@ -140,6 +150,23 @@ protected:
     wmIndoorSensorPin = new UnsignedIntParameter("indoor_sensor_pin", "Indoor sensor GPIO", settings.sensors.indoor.pin, 2);
     wm.addParameter(wmIndoorSensorPin);
 
+    wm.addParameter(wmSep);
+
+    wmExtPumpUse = new CheckboxParameter("ext_pump_use", "Use external pump", settings.externalPump.use);
+    wm.addParameter(wmExtPumpUse);
+
+    wmExtPumpPin = new UnsignedIntParameter("ext_pump_pin", "External pump GPIO", settings.externalPump.pin, 2);
+    wm.addParameter(wmExtPumpPin);
+
+    wmExtPumpPostCirculationTime = new UnsignedShortParameter("ext_pump_ps_time", "External pump post circulation time", settings.externalPump.postCirculationTime, 5);
+    wm.addParameter(wmExtPumpPostCirculationTime);
+
+    wmExtPumpAntiStuckInterval = new UnsignedIntParameter("ext_pump_as_interval", "External pump anti stuck interval", settings.externalPump.antiStuckInterval, 7);
+    wm.addParameter(wmExtPumpAntiStuckInterval);
+
+    wmExtPumpAntiStuckTime = new UnsignedShortParameter("ext_pump_as_time", "External pump anti stuck time", settings.externalPump.antiStuckTime, 5);
+    wm.addParameter(wmExtPumpAntiStuckTime);
+
     //wm.setCleanConnect(true);
     wm.setRestorePersistent(false);
 
@@ -149,7 +176,7 @@ protected:
     wm.setConfigPortalBlocking(false);
     wm.setSaveParamsCallback(saveParamsCallback);
     wm.setPreOtaUpdateCallback([this] {
-      for (Task* task : this->tasksForDisable) {
+      for (AbstractTask* task : this->tasksForDisable) {
         if (task->isEnabled()) {
           task->disable();
         }
@@ -347,6 +374,32 @@ protected:
       settings.sensors.indoor.pin = wmIndoorSensorPin->getValue();
     }
 
+    if (wmExtPumpUse->getCheckboxValue() != settings.externalPump.use) {
+      changed = true;
+      settings.externalPump.use = wmExtPumpUse->getCheckboxValue();
+    }
+
+    if (wmExtPumpPin->getValue() != settings.externalPump.pin) {
+      changed = true;
+      needRestart = true;
+      settings.externalPump.pin = wmExtPumpPin->getValue();
+    }
+
+    if (wmExtPumpPostCirculationTime->getValue() != settings.externalPump.postCirculationTime) {
+      changed = true;
+      settings.externalPump.postCirculationTime = wmExtPumpPostCirculationTime->getValue();
+    }
+
+    if (wmExtPumpAntiStuckInterval->getValue() != settings.externalPump.antiStuckInterval) {
+      changed = true;
+      settings.externalPump.antiStuckInterval = wmExtPumpAntiStuckInterval->getValue();
+    }
+
+    if (wmExtPumpAntiStuckTime->getValue() != settings.externalPump.antiStuckTime) {
+      changed = true;
+      settings.externalPump.antiStuckTime = wmExtPumpAntiStuckTime->getValue();
+    }
+
     if (!changed) {
       return;
     }
diff --git a/src/defines.h b/src/defines.h
index 3e13a4c..dd9767c 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -1,5 +1,5 @@
 #define PROJECT_NAME                "OpenTherm Gateway"
-#define PROJECT_VERSION             "1.3.4"
+#define PROJECT_VERSION             "1.4.0"
 #define PROJECT_REPO                "https://github.com/Laxilef/OTGateway"
 #define AP_SSID                     "OpenTherm Gateway"
 #define AP_PASSWORD                 "otgateway123456"
@@ -54,6 +54,10 @@
   #define SENSOR_INDOOR_PIN_DEFAULT 0
 #endif
 
+#ifndef EXT_PUMP_PIN_DEFAULT
+  #define EXT_PUMP_PIN_DEFAULT 0
+#endif
+
 #ifndef PROGMEM
   #define PROGMEM 
 #endif