anchor.diff:  					PM.setAttachLayer(piping_layer)
   
   		if(DISPOSALS_MODE) //Making disposals pipes
  +			if(!can_make_pipe)
  +				return ..()
   			if(isclosedturf(A))
   				to_chat(user, "<span class='warning'>\the [src]'s error light flickers; there's something in the way!</span>")
   				return
  
positive.code: 	. = FALSE
  	switch(p_class) //if we've gotten this var, the target is valid
  		if(PAINT_MODE) //Paint pipes
  			var/obj/machinery/atmospherics/pipe/P = A
  			playsound(get_turf(src), 'sound/machines/click.ogg', 50, 1)
  			P.paint(paint_colors[paint_color])
  
negative.code: 			A = get_turf(user)
  
  	//make sure what we're clicking is valid for the current mode
  	var/can_make_pipe = ((atmos_piping_mode || p_class == DISPOSALS_MODE) && (isturf(A)) || istype(A, /obj/structure/lattice) || istype(A, /obj/structure/girder))
  
  	//So that changing the menu settings doesn't affect the pipes already being built.
  	var/queued_p_type = p_type
  