Ben Clark-Eden had given the visitors a lead in the second half with a header, before Shola Shoretire scored the Reds’ equalising goal with just less than 20 minutes remaining.
United remain in second place in the Premier League Cup Group F, but it is results elsewhere that will now determine whether they are to make any further progress in the competition.
Under-18s manager Neil Ryan named a much changed line-up to that which won last time out against League leaders, Manchester City. Just two players, Will Fish and Hannibal Mejbri, remained from that successful trip across town to the Etihad campus.