possible head gasket leaking, cracked head or freeze plug rusted out.
Sounds like a leak on the suction side of your equipment.
Cartridge is not installed correctly or you have a crack in the manifold allowing dirty water to pass by the filter.
spider gasket is bad
about an inch below the TOP of the filter...there should be a line on your filter...
you have an air leak somewhere. or the water level isn't correct
Water is coming through the back wash when it is in filter position
If you are getting water in the fuel filter, it is coming from your fuel tank. You will need to remove and clean the tank.
Usually the top of the sand filter is above the water level of the pool, so all you have to do is unscrew the top and look in. However if the filter is below the pools water level you will have to cut of the water coming from and to the pool before you do. who added the sand? If you did - did you follow the manufacturer's instructions as to how much and what type of sand to use? Instructions tell you - - SPECIFICALLY - - how many pounds of # 20 silica sand to use.
No, not if the filter is set to backwash or waste.
Have you got the multivalve setting set on filter? If so you will probably have to replace aseal in there as some of your water is going to the wrong place.
If water is not coming from outlet of geyser, it might be because faulty geyser or because it was badly installed. The problem can be leaking water through the ceiling or somewhere. Another reason can be insufficient hot water pressure.
If you mean the water flowing from a filter, yes. It needs to fall into the tank water to work properly.