There can be several reasons for this:
Your tank valve is off: On the top of a reverse osmosis tank there’s a small valve handle. This handle should be in line with the tube coming out of it. If it is not, turn it 90 degrees counterclockwise so that it is in-line with the pipe. You will likely hear a rush of water. This is a good sign. Keep in mind that it will now it will take an hour or so to fill the tank.
Your feed valve is off: Underneath your sink there are two copper or plastic pipes. Attached to the cold water pipe (usually the one on the right side) is your feed valve. This valve may be an “angle stop valve” (similar to the valve on your tank) or be a “piercing valve” (similar to the valve that feeds a furnace humidifier).
If there is an angle stop valve, ensure that the handle is in line (not perpendicular) with the coming out of it. If it is perpendicular, turn it 90 degrees counterclockwise. You will likely hear a rush of water. This is a good sign. Keep in mind that it will now it will take an hour or so to fill the tank.
If there is a piercing valve, turn this valve many times counter clockwise until it becomes difficult to turn. These valves are designed to be in the “on” or “off” position and may squirt some water out as you turn. Don’t worry about this - it should stop squirting water once it is difficult to turn.
Your filters are clogged: This may even happen if you have changed your filters recently. There are several reasons that you could be having this problem. The most common is that either down the street, around the corner or even kilometres away there can be a broken water main, the city could flush out a fire hydrant, a length of pipe could be replaced or a homeowner in the neighbourhood replaced the main to their house. This doesn’t necessarily have to be something that happened just down the street. These events can suddenly flush a load of dirt down the pipe and this clogs the pre-filters in your system. You wouldn’t notice this in the rest of the house because it would come out pretty much invisibly through the other faucets very quickly.
If you have tried the possibilities above and still have low pressure or no water from your reverse osmosis system, there are other possibilities such as low pressure in the tank, a clogged membrane check valve, a ruptured tank bladder, a clogged flow restrictor, a torn membrane in the automatic shut off or any number of other reasons. Give Watermart a call and we’ll be happy to help you troubleshoot over the phone or send a service technician to help you out.