diff --git a/code/game/objects/items/devices/transfer_valve.dm b/code/game/objects/items/devices/transfer_valve.dm
index 4e899aa324..943ff030b3 100644
--- a/code/game/objects/items/devices/transfer_valve.dm
+++ b/code/game/objects/items/devices/transfer_valve.dm
@@ -6,6 +6,7 @@
 	lefthand_file = 'icons/mob/inhands/weapons/bombs_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/weapons/bombs_righthand.dmi'
 	desc = "Regulates the transfer of air between two tanks."
+	w_class = WEIGHT_CLASS_BULKY
 	var/obj/item/tank/tank_one
 	var/obj/item/tank/tank_two
 	var/obj/item/device/assembly/attached_device
@@ -27,15 +28,11 @@
 				return
 			tank_one = item
 			to_chat(user, "<span class='notice'>You attach the tank to the transfer valve.</span>")
-			if(item.w_class > w_class)
-				w_class = item.w_class
 		else if(!tank_two)
 			if(!user.transferItemToLoc(item, src))
 				return
 			tank_two = item
 			to_chat(user, "<span class='notice'>You attach the tank to the transfer valve.</span>")
-			if(item.w_class > w_class)
-				w_class = item.w_class
 
 		update_icon()
 //TODO: Have this take an assemblyholder