Robert B North Fort Myers , FL March 13, 2015 Appliance: Samsung Refrigerator RS261MDWP/XAA Samsung Refrigerator Rs261mdwp/Xaa / : Filter housing needed replacement. How to replace Refrigerator Water Filter Housing Assembly. After replacing my filter the water dispenser , when in use, was pulsating . I found that the check valve, built into the filter housing , was bad After replacing the housing the water dispenser worked fine. 10 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes