diff --git a/code/ATMOSPHERICS/components/unary/vent_pump.dm b/code/ATMOSPHERICS/components/unary/vent_pump.dm
index 1550eb7ae9..b80b317d46 100644
--- a/code/ATMOSPHERICS/components/unary/vent_pump.dm
+++ b/code/ATMOSPHERICS/components/unary/vent_pump.dm
@@ -1,3 +1,8 @@
+#define EXTERNAL_PRESSURE_BOUND ONE_ATMOSPHERE
+#define INTERNAL_PRESSURE_BOUND 0
+#define PRESSURE_CHECKS 1
+#undefine
+
 /obj/machinery/atmospherics/unary/vent_pump
 	icon = 'icons/obj/atmospherics/vent_pump.dmi'
 	icon_state = "off"
@@ -14,14 +19,19 @@
 	var/on = 0
 	var/pump_direction = 1 //0 = siphoning, 1 = releasing
 
-	var/external_pressure_bound = ONE_ATMOSPHERE
-	var/internal_pressure_bound = 0
+	var/external_pressure_bound = EXTERNAL_PRESSURE_BOUND
+	var/internal_pressure_bound = INTERNAL_PRESSURE_BOUND
 
-	var/pressure_checks = 1
+	var/pressure_checks = PRESSURE_CHECKS
 	//1: Do not pass external_pressure_bound
 	//2: Do not pass internal_pressure_bound
 	//3: Do not pass either
 
+	// Used when handling incoming radio signals requesting default settings
+	var/external_pressure_bound_default = EXTERNAL_PRESSURE_BOUND
+	var/internal_pressure_bound_default = INTERNAL_PRESSURE_BOUND
+	var/pressure_checks_default = PRESSURE_CHECKS
+
 	var/welded = 0 // Added for aliens -- TLE
 
 	var/frequency = 1439
@@ -205,7 +215,10 @@
 			on = !on
 
 		if(signal.data["checks"] != null)
-			pressure_checks = text2num(signal.data["checks"])
+			if (signal.data["set_internal_pressure"] == "default")
+				pressure_checks = pressure_checks_default
+			else
+				pressure_checks = text2num(signal.data["checks"])
 
 		if(signal.data["checks_toggle"] != null)
 			pressure_checks = (pressure_checks?0:3)
@@ -214,18 +227,24 @@
 			pump_direction = text2num(signal.data["direction"])
 
 		if(signal.data["set_internal_pressure"] != null)
-			internal_pressure_bound = between(
-				0,
-				text2num(signal.data["set_internal_pressure"]),
-				ONE_ATMOSPHERE*50
-			)
+			if (signal.data["set_internal_pressure"] == "default")
+				internal_pressure_bound = internal_pressure_bound_default
+			else
+				internal_pressure_bound = between(
+					0,
+					text2num(signal.data["set_internal_pressure"]),
+					ONE_ATMOSPHERE*50
+				)
 
 		if(signal.data["set_external_pressure"] != null)
-			external_pressure_bound = between(
-				0,
-				text2num(signal.data["set_external_pressure"]),
-				ONE_ATMOSPHERE*50
-			)
+			if (signal.data["set_external_pressure"] == "default")
+				external_pressure_bound = external_pressure_bound_default
+			else
+				external_pressure_bound = between(
+					0,
+					text2num(signal.data["set_external_pressure"]),
+					ONE_ATMOSPHERE*50
+				)
 
 		if(signal.data["adjust_internal_pressure"] != null)
 			internal_pressure_bound = between(
@@ -235,6 +254,8 @@
 			)
 
 		if(signal.data["adjust_external_pressure"] != null)
+
+
 			external_pressure_bound = between(
 				0,
 				external_pressure_bound + text2num(signal.data["adjust_external_pressure"]),
diff --git a/code/game/machinery/alarm.dm b/code/game/machinery/alarm.dm
index c788dc6430..522882577d 100644
--- a/code/game/machinery/alarm.dm
+++ b/code/game/machinery/alarm.dm
@@ -71,6 +71,7 @@
 	active_power_usage = 8
 	power_channel = ENVIRON
 	req_one_access = list(access_atmospherics, access_engine_equip)
+	var/breach_detection = 1 // Whether to use automatic breach detection or not
 	var/frequency = 1439
 	//var/skipprocess = 0 //Experimenting
 	var/alarm_frequency = 1437
@@ -276,17 +277,20 @@
 
 	if(!istype(location))
 		return 0
-	
+
+	if(breach_detection	== 0)
+		return 0
+
 	var/datum/gas_mixture/environment = location.return_air()
 	var/environment_pressure = environment.return_pressure()
 	var/pressure_levels = TLV["pressure"]
-	
+
 	if (environment_pressure <= pressure_levels[1])		//low pressures
 		if (!(mode == AALARM_MODE_PANIC || mode == AALARM_MODE_CYCLE))
 			return 1
-	
+
 	return 0
-	
+
 
 /obj/machinery/alarm/proc/master_is_operating()
 	return alarm_area.master_air_alarm && !(alarm_area.master_air_alarm.stat & (NOPOWER|BROKEN))
@@ -397,14 +401,12 @@
 	return 1
 
 /obj/machinery/alarm/proc/apply_mode()
-	var/current_pressures = TLV["pressure"]
-	var/target_pressure = (current_pressures[2] + current_pressures[3])/2
 	switch(mode)
 		if(AALARM_MODE_SCRUBBING)
 			for(var/device_id in alarm_area.air_scrub_names)
 				send_signal(device_id, list("power"= 1, "co2_scrub"= 1, "scrubbing"= 1, "panic_siphon"= 0) )
 			for(var/device_id in alarm_area.air_vent_names)
-				send_signal(device_id, list("power"= 1, "checks"= 1, "set_external_pressure"= target_pressure) )
+				send_signal(device_id, list("power"= 1, "checks"= "default", "set_external_pressure"= "default") )
 
 		if(AALARM_MODE_PANIC, AALARM_MODE_CYCLE)
 			for(var/device_id in alarm_area.air_scrub_names)
@@ -416,13 +418,13 @@
 			for(var/device_id in alarm_area.air_scrub_names)
 				send_signal(device_id, list("power"= 1, "panic_siphon"= 1) )
 			for(var/device_id in alarm_area.air_vent_names)
-				send_signal(device_id, list("power"= 1, "checks"= 1, "set_external_pressure"= target_pressure) )
+				send_signal(device_id, list("power"= 1, "checks"= "default", "set_external_pressure"= "default") )
 
 		if(AALARM_MODE_FILL)
 			for(var/device_id in alarm_area.air_scrub_names)
 				send_signal(device_id, list("power"= 0) )
 			for(var/device_id in alarm_area.air_vent_names)
-				send_signal(device_id, list("power"= 1, "checks"= 1, "set_external_pressure"= target_pressure) )
+				send_signal(device_id, list("power"= 1, "checks"= "default", "set_external_pressure"= "default") )
 
 		if(AALARM_MODE_OFF)
 			for(var/device_id in alarm_area.air_scrub_names)