My FFR coolant couplings that connect the flex tubing to the hard tubing and waterpump all leak a tiny bit. I've been looking for alternatives and I've found a few types of reducing couplers. Has anyone had experience with any of these?

61Z61v3zrML._SL1500_.jpg61OY3-OPEmL._SL1350_.jpg410yGAp76iL.jpg