Atmospherics Destroy() cleanup - return qdel hints.

code/ATMOSPHERICS/components/binary_devices/binary_atmos_base.dm

@@ -42,7 +42,7 @@ obj/machinery/atmospherics/binary
 		return null
 
 	Destroy()
-		loc = null
+		. = ..()
 
 		if(node1)
 			node1.disconnect(src)
@@ -54,8 +54,6 @@ obj/machinery/atmospherics/binary
 		node1 = null
 		node2 = null
 
-		..()
-
 	initialize()
 		if(node1 && node2) return
 

code/ATMOSPHERICS/components/binary_devices/pipeturbine.dm

@@ -36,7 +36,7 @@
 				initialize_directions = NORTH|SOUTH
 
 	Destroy()
-		loc = null
+		. = ..()
 
 		if(node1)
 			node1.disconnect(src)
@@ -48,8 +48,6 @@
 		node1 = null
 		node2 = null
 
-		..()
-
 	process()
 		..()
 		if(anchored && !(stat&BROKEN))

code/ATMOSPHERICS/components/omni_devices/filter.dm

@@ -28,7 +28,7 @@
 	input = null
 	output = null
 	filters.Cut()
-	..()
+	return ..()
 
 /obj/machinery/atmospherics/omni/filter/sort_ports()
 	for(var/datum/omni_port/P in ports)

code/ATMOSPHERICS/components/portables_connector.dm

@@ -61,7 +61,7 @@
 	return null
 
 /obj/machinery/atmospherics/portables_connector/Destroy()
-	loc = null
+	. = ..()
 
 	if(connected_device)
 		connected_device.disconnect()
@@ -72,8 +72,6 @@
 
 	node = null
 
-	..()
-
 /obj/machinery/atmospherics/portables_connector/initialize()
 	if(node) return
 

code/ATMOSPHERICS/components/trinary_devices/trinary_base.dm

@@ -51,7 +51,7 @@ obj/machinery/atmospherics/trinary
 		return null
 
 	Destroy()
-		loc = null
+		. = ..()
 
 		if(node1)
 			node1.disconnect(src)
@@ -67,8 +67,6 @@ obj/machinery/atmospherics/trinary
 		node2 = null
 		node3 = null
 
-		..()
-
 	initialize()
 		if(node1 && node2 && node3) return
 

code/ATMOSPHERICS/components/tvalve.dm

@@ -100,7 +100,7 @@
 	return null
 
 /obj/machinery/atmospherics/tvalve/Destroy()
-	loc = null
+	. = ..()
 
 	if(node1)
 		node1.disconnect(src)
@@ -116,8 +116,6 @@
 	node2 = null
 	node3 = null
 
-	..()
-
 /obj/machinery/atmospherics/tvalve/proc/go_to_side()
 
 	if(state) return 0

code/ATMOSPHERICS/components/unary/unary_base.dm

@@ -31,7 +31,7 @@
 		return null
 
 	Destroy()
-		loc = null
+		. = ..()
 
 		if(node)
 			node.disconnect(src)
@@ -39,8 +39,6 @@
 
 		node = null
 
-		..()
-
 	initialize()
 		if(node) return
 

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -80,7 +80,10 @@
 
 /obj/machinery/atmospherics/unary/vent_pump/Destroy()
 	unregister_radio(src, frequency)
-	..()
+	if(initial_loc)
+		initial_loc.air_vent_info -= id_tag
+		initial_loc.air_vent_names -= id_tag
+	return ..()
 
 /obj/machinery/atmospherics/unary/vent_pump/high_volume
 	name = "Large Air Vent"
@@ -414,13 +417,6 @@
 		new /obj/item/pipe(loc, make_from=src)
 		qdel(src)
 
-/obj/machinery/atmospherics/unary/vent_pump/Destroy()
-	if(initial_loc)
-		initial_loc.air_vent_info -= id_tag
-		initial_loc.air_vent_names -= id_tag
-	..()
-	return
-
 #undef DEFAULT_PRESSURE_DELTA
 
 #undef EXTERNAL_PRESSURE_BOUND

code/ATMOSPHERICS/components/unary/vent_scrubber.dm

@@ -44,8 +44,10 @@
 
 /obj/machinery/atmospherics/unary/vent_scrubber/Destroy()
 	unregister_radio(src, frequency)
-	..()
-
+	if(initial_loc)
+		initial_loc.air_scrub_info -= id_tag
+		initial_loc.air_scrub_names -= id_tag
+	return ..()
 
 /obj/machinery/atmospherics/unary/vent_scrubber/update_icon(var/safety = 0)
 	if(!check_icon_cache())
@@ -285,10 +287,3 @@
 		user << "A small gauge in the corner reads [round(last_flow_rate, 0.1)] L/s; [round(last_power_draw)] W"
 	else
 		user << "You are too far away to read the gauge."
-
-/obj/machinery/atmospherics/unary/vent_scrubber/Destroy()
-	if(initial_loc)
-		initial_loc.air_scrub_info -= id_tag
-		initial_loc.air_scrub_names -= id_tag
-	..()
-	return

code/ATMOSPHERICS/components/valve.dm

@@ -72,7 +72,7 @@
 	return null
 
 /obj/machinery/atmospherics/valve/Destroy()
-	loc = null
+	. = ..()
 
 	if(node1)
 		node1.disconnect(src)
@@ -84,8 +84,6 @@
 	node1 = null
 	node2 = null
 
-	..()
-
 /obj/machinery/atmospherics/valve/proc/open()
 	if(open) return 0
 

code/ATMOSPHERICS/datum_pipeline.dm

@@ -10,14 +10,12 @@ datum/pipeline
 	var/alert_pressure = 0
 
 	Destroy()
-		if(network)
-			qdel(network)
+		qdel_null(network)
 
 		if(air && air.volume)
 			temporarily_store_air()
-			qdel(air)
 
-		..()
+		. = ..()
 
 	proc/process()//This use to be called called from the pipe networks