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I’ve got an issue I’ve got a dual 150 RO filter system with water pump to improve efficiency. The water in comes from a spigot and garden hose. The waste water goes to a sump pump. The RO water fills a trash can (reservoir$ with a float switch to cut it off. When the reservoir is full and the float switch cuts off the RO waste is continuing run endlessly. That’s not suppose to happen and I’ve got no idea what’s wrong. There is a pressure gauge that’s connected to the RO system that must be broken because it reads zero whether the reservoir is full or not.
At the moment I’m turn the system on and off Manually I’ve replaced all my filters and membranes in an attempt to fix this but it didn’t change anything. So I don’t know what else to check or an internal part that may have wore out? My system is roughly 6 years old and puts out clean water. I can’t believe the whole system needs to be replaced. Any help would be greatly appreciated.
The float switch - is it like a toilet float to cut off the water supply feeding the RO system, or electric to cut off the pump? I think you can see where I'm heading and take it from there..
The float switch - is it like a toilet float to cut off the water supply feeding the RO system, or electric to cut off the pump? I think you can see where I'm heading and take it from there..
It’s like an old toilet float that had the arm and “ball”. But what I have is I whole near the top of the trash can. The water flows through this and runs out under the float. It only sticks out from the side about 2 inches. Once the float it triggered it cut the flow of water in the right before the float. The float and cut off are one in the same. I’m not sure what cuts the booster pump off other than the pressure built up by the water being cut off at the float
The float switch - is it like a toilet float to cut off the water supply feeding the RO system, or electric to cut off the pump? I think you can see where I'm heading and take it from there..
This is the first thing that popped up in a google search that looks exactly like my float switch
The key is WHERE the water gets cut off. If you are cutting it off on one of the two outlets that an RO system has, there is still water pressure on the membrane. Now do you see where I am trying to guide you?
The key is WHERE the water gets cut off. If you are cutting it off on one of the two outlets that an RO system has, there is still water pressure on the membrane. Now do you see where I am trying to guide you?
No or I wouldn’t be looking for help. But now that I’ve looked at these pics and thought about Im leaning towards the water “circuit?” In the wiring of the booster pump.
I’ve got an issue I’ve got a dual 150 RO filter system with water pump to improve efficiency. The water in comes from a spigot and garden hose. The waste water goes to a sump pump. The RO water fills a trash can (reservoir$ with a float switch to cut it off. When the reservoir is full and the float switch cuts off the RO waste is continuing run endlessly. That’s not suppose to happen and I’ve got no idea what’s wrong. There is a pressure gauge that’s connected to the RO system that must be broken because it reads zero whether the reservoir is full or not.
At the moment I’m turn the system on and off Manually I’ve replaced all my filters and membranes in an attempt to fix this but it didn’t change anything. So I don’t know what else to check or an internal part that may have wore out? My system is roughly 6 years old and puts out clean water. I can’t believe the whole system needs to be replaced. Any help would be greatly appreciated.
OK, I'll spell it out.
Think of the RO membrane as a window screen slanted at about 45 degrees from vertical about two feet off the ground that you drop dirt on. The dirt lands on top of the screen, slides, and the larger clumps and pebbles go off the edge of a cliff. The area under the screen has a box for the screened sand that has fallen through the screen. That box can be completely filled and a cover applied.
The dirty water coming in to your RO is the dirt being dropped on the screen, the screened sand in the box is your good water, and the excess dirt falling off the cliff is the waste water.
You have to stop the dirt before the screen to prevent it from continuing to fall off the top of the screen when the box is full. Covering the box (or closing the good water outlet) won't do anything.
Once you somehow rig your float valve to close off the water flow to the inlet side of the RO system, the continuing waste water drip will eventually stop, once the pressure drops enough.
Think of the RO membrane as a window screen slanted at about 45 degrees from vertical about two feet off the ground that you drop dirt on. The dirt lands on top of the screen, slides, and the larger clumps and pebbles go off the edge of a cliff. The area under the screen has a box for the screened sand that has fallen through the screen. That box can be completely filled and a cover applied.
The dirty water coming in to your RO is the dirt being dropped on the screen, the screened sand in the box is your good water, and the excess dirt falling off the cliff is the waste water.
You have to stop the dirt before the screen to prevent it from continuing to fall off the top of the screen when the box is full. Covering the box (or closing the good water outlet) won't do anything.
Once you somehow rig your float valve to close off the water flow to the inlet side of the RO system, the continuing waste water drip will eventually stop, once the pressure drops enough.
Got it so the problem has to be at or near the booster pump because it can’t enter the system before the booster or it wouldn’t do its job Thank you. I mounted it 6 years ago and didn’t even think about that switch near the pump being the cut off. But it makes perfect sense THANK YOU
Yeah I agree- best to cut off the inlet, not just the clean outlet.
My undersink RO has a pressure-controlled cutoff where whenever the storage tank fills with clean water and the pressure matches or nears the inlet pressure, the inlet side shuts off. So it's a product that exists. Unfortunately I can't find it separately- it came with the system. This would work in conjunction with your current shutoff setup I believe, since the clean water line would pressure after your float switch shuts it off.
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Thank you. I mounted it 6 years ago and didn’t even think about that switch near the pump being the cut off. But it makes perfect sense THANK YOU 
