Russell K Menifee , CA August 14, 2016 Appliance: Maytag Refrigerator MZD2666KES Maytag Refrigerator Mzd2666kes: Slow flow from water dispenser. How to replace Water Filter Head And Tube Assembly. Replaced water filter head and tubing as old one was occluded from hard water minerals. Be careful removing insulating styrofoam block as it is fragile. Push it out from inside the refrigerator. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes