I have a Pentair FNS filter with a Hi-flow backwash valve. The valve top was cracked around the bolt holes and leaking so I replaced the valve top and the gasket. Turn off all power to the system. The filter is only about 7 yrs old. The backwash valve is the valve which is mounted on either the top or side of your filter tank and are specifically used clean sand filters or DE filters. I have a Pentair Backwash valve that is fairly new. After putting it back together, I now have another leak at the base of the push/pull handle!!! The backwash valve is one of the more troublesome parts of a pool system. Any suggestions For retrofit installations only, follow steps a-d. For new installations, proceed to Step 2. It is fitted with locking nuts to align and join to It leaks at the top of the shaft at the handle when closed in the filter position. One of the most common problems pool owners run across when maintaining and serving their swimming pool is a leaking backwash valve. Place O-rings on the face of the union fittings, where the face of the backwash valve union will Everything seems to be installed correctly. Backwash Valves - Troubleshooting. Now there is water leaking out of the backwash hose when the valve is set in filter mode. A few days ago, I backwashed and then took the filter apart and cleaned the grids. I have a Pentair FNS filter with a Hi-flow backwash valve. *PENTAIR IS A REGISTERED TRADEMARK OF PENTAIR AQUATIC SYSTEMS The CMP 25831-11X-750 Slide Valve (Pent 263064) 2” DE/SAND is designed specifically for use with Pentair DE/SAND Filters, Triton II, Triton C, Triton HD, FNS, FNS Plus, Nautilus, Nautilus Plus. I assume that it is the seal on the valve… The top was cracked at the bolt holes and leaking so I replaced the top along with the diverter gasket. With proper maintenance, it should not be much of a problem, but it is important to be on the lookout for problem signs. 2. My Backwash Valve Leaks from the lid / top of the valve (Not from the shaft, but the top cover where it attaches to the Valve housing.) I adhesived the gasket in place and replaced the valve top. Presume it is the top oring. Valve is difficult to operate. I searched the forums for a similar problem but only saw threads discussing the issue of water leaking from the waste line when there was a multiport or a push/pull type backwash valve involved. FullFloXF™ Backwash Valve Installation and User’s Guide Installing the Valve onto the Filter 1. MY Pentair 261165 2" Slide Valve is leaking water into the drain. I have a Pentair (Pac Fab) series 2000 DE filter with built in backwash valve that is leaking out the backwash port at a rate of 6 or 7 drops per minute. They last time, They replaced the valve and stopped the leak. How do you lubricate or replace it. However, if I move the handle just a quarter of an inch countercloskwise ( toward the backwash position) the leaking stops. It became difficult to close the valve recently, I could not turn the valve to close it and now it turns freely but it leaks water into the sewer drain when the pump is running. Is there a repair I can do without replacing the entire valve system? For a push pull valve, Leaking at the Top Cover: take the top off the backwash valve, clean or replace the lid o-ring, lube it as is described above (O-rings and shaft as well), and reassemble. I disassembled completely and cleaned everything but still leaks. A sticking valve is the earliest sign of problems. Sign of problems filter 1 backwash position pentair backwash valve leaking the leaking stops I backwashed and then took the filter.. At the handle when closed in the filter apart and cleaned everything but leaks... Top and the gasket in place and replaced the valve top and the gasket is leaking... Backwashed and then took the filter 1 serving their swimming pool is a leaking backwash valve is! 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