diff --git a/code/datums/ductnet.dm b/code/datums/ductnet.dm
index f81e9e608c..3ab936f6f4 100644
--- a/code/datums/ductnet.dm
+++ b/code/datums/ductnet.dm
@@ -6,7 +6,7 @@
 	var/capacity
 
 /datum/ductnet/proc/add_duct(obj/machinery/duct/D)
-	if(!D || D in ducts)
+	if(!D || (D in ducts))
 		return
 	ducts += D
 	D.duct = src
@@ -57,4 +57,4 @@
 		var/obj/machinery/duct/D = A
 		D.duct = null
 	if(delete) //I don't want code to run with qdeleted objects because that can never be good, so keep this in-case the ductnet has some business left to attend to before commiting suicide
-		qdel(src) 
+		qdel(src)
diff --git a/code/modules/plumbing/plumbers/bottler.dm b/code/modules/plumbing/plumbers/bottler.dm
index 57233a5873..396c7cac22 100644
--- a/code/modules/plumbing/plumbers/bottler.dm
+++ b/code/modules/plumbing/plumbers/bottler.dm
@@ -65,15 +65,15 @@
 			var/obj/item/reagent_containers/B = AM
 			///see if it would overflow else inject
 			if((B.reagents.total_volume + wanted_amount) <= B.reagents.maximum_volume)
-				reagents.trans_to(B, wanted_amount, transfered_by = src)
+				reagents.trans_to(B, wanted_amount)
 				B.forceMove(goodspot)
 				return
 			///glass was full so we move it away
 			AM.forceMove(badspot)
 		if(istype(AM, /obj/item/slime_extract)) ///slime extracts need inject
 			AM.forceMove(goodspot)
-			reagents.trans_to(AM, wanted_amount, transfered_by = src, method = INJECT)
+			reagents.trans_to(AM, wanted_amount)
 			return
 		if(istype(AM, /obj/item/slimecross/industrial)) ///no need to move slimecross industrial things
-			reagents.trans_to(AM, wanted_amount, transfered_by = src, method = INJECT)
+			reagents.trans_to(AM, wanted_amount)
 			return
diff --git a/code/modules/plumbing/plumbers/grinder_chemical.dm b/code/modules/plumbing/plumbers/grinder_chemical.dm
index d080bd7c8f..f39c79f906 100644
--- a/code/modules/plumbing/plumbers/grinder_chemical.dm
+++ b/code/modules/plumbing/plumbers/grinder_chemical.dm
@@ -56,7 +56,7 @@
 			I.on_juice()
 			reagents.add_reagent_list(I.juice_results)
 			if(I.reagents)
-				I.reagents.trans_to(src, I.reagents.total_volume, transfered_by = src)
+				I.reagents.trans_to(src, I.reagents.total_volume)
 			qdel(I)
 			return
 		I.on_grind()