Fixes for #476 and #475.

code/ATMOSPHERICS/components/unary/outlet_injector.dm

@@ -198,7 +198,7 @@
 			P.buffer = null
 
 		usr.set_machine(src)
-		updateUsrDialog()
+		update_multitool_menu()
 
 	attackby(var/obj/item/weapon/W as obj, var/mob/user as mob)
 		if(istype(W, /obj/item/device/multitool))

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -333,7 +333,7 @@
 				user << "\blue You need more welding fuel to complete this task."
 				return 1
 		if(istype(W, /obj/item/device/multitool))
-			interact(user)
+			update_multitool_menu(user)
 			return 1
 		if (!istype(W, /obj/item/weapon/wrench))
 			return ..()
@@ -376,6 +376,8 @@
 			return
 
 	var/obj/item/device/multitool/P = get_multitool(usr)
+	if(!P || !istype(P))
+		return
 
 	if("set_id" in href_list)
 		var/newid = copytext(reject_bad_text(input(usr, "Specify the new ID tag for this machine", src, id_tag) as null|text),1,MAX_MESSAGE_LEN)
@@ -408,4 +410,4 @@
 		P.buffer = null
 
 	usr.set_machine(src)
-	updateUsrDialog()
+	update_multitool_menu()

code/ATMOSPHERICS/components/unary/vent_scrubber.dm

@@ -278,6 +278,9 @@
 		update_icon()
 
 	attackby(var/obj/item/weapon/W as obj, var/mob/user as mob)
+		if(istype(W, /obj/item/device/multitool))
+			update_multitool_menu(user)
+			return 1
 		if (!istype(W, /obj/item/weapon/wrench))
 			return ..()
 		if (!(stat & NOPOWER) && on)
@@ -311,6 +314,51 @@
 		</ul>
 		"}
 
+/obj/machinery/atmospherics/unary/vent_scrubber/Topic(href, href_list)
+	if(..())
+		return
+
+	if(!issilicon(usr))
+		if(!istype(usr.get_active_hand(), /obj/item/device/multitool))
+			return
+
+	var/obj/item/device/multitool/P = get_multitool(usr)
+	if(!P || !istype(P))
+		return
+
+	if("set_id" in href_list)
+		var/newid = copytext(reject_bad_text(input(usr, "Specify the new ID tag for this machine", src, id_tag) as null|text),1,MAX_MESSAGE_LEN)
+		if(newid)
+			id_tag = newid
+			initialize()
+	if("set_freq" in href_list)
+		var/newfreq=frequency
+		if(href_list["set_freq"]!="-1")
+			newfreq=text2num(href_list["set_freq"])
+		else
+			newfreq = input(usr, "Specify a new frequency (GHz). Decimals assigned automatically.", src, network) as null|num
+		if(newfreq)
+			if(findtext(num2text(newfreq), "."))
+				newfreq *= 10 // shift the decimal one place
+			if(newfreq < 10000)
+				frequency = newfreq
+				initialize()
+
+	if(href_list["unlink"])
+		P.visible_message("\The [P] buzzes in an annoying tone.","You hear a buzz.")
+
+	if(href_list["link"])
+		P.visible_message("\The [P] buzzes in an annoying tone.","You hear a buzz.")
+
+	if(href_list["buffer"])
+		P.buffer = src
+
+	if(href_list["flush"])
+		P.buffer = null
+
+	usr.set_machine(src)
+	update_multitool_menu()
+
 /obj/machinery/atmospherics/unary/vent_scrubber/Del()
 	if(initial_loc)
 		initial_loc.air_scrub_info -= id_tag