I just had my reverse osmosis system serviced. The technician said that the sediment filter had some problem in passing water. The water pressure was low in the correct (or marked) water flow direction. He tried to clean it and then placed it back in the reverse direction. He said that it is okay to have it in reverse direction as it will serve it purpose, but looking at the videos of whats inside a sediment filter, I think this is not the right way.

Can some please tell if this is okay or should I get it reverted?