Joespha, thats about right. If you look in the pic that Joe provided you can see on the right hand corner about an inch from the box toward the skimmer base there is some distortion of the orange crate. There are 2 very small holes there. They provide ro water to the sump.
If you look closely to the box you will see that I used silicone to seal the gap between the box and the sump. The right and left silicone blobs seal the nylon screws that hold the box. The center blob seals the hole that runs through the sump, it is far larger than the two little holes and will drain faster than the float can run wide open. I don't have this hooked up to the drain as its a cement floor in the basement with a drain nearby. If you had a sump upstairs or under the tank it could be hooked up to a drain and it would prevent any possible flodding dangers.
I'll attempt to explain it again as I know this can be confusing to read (but moronically simple to look at). If this float switch fails the RO water will fill this box up to the level of the drain hole in the side of box that runs out of the sump. That hole is about 1" higher than the water level is now. Now that the water is at a constant height of 1 inch higher than the sump it begins to fill it because there is a difference in the height on the box and the sump. However, once the levels are the same there is no expchange between the box and the sump. It is the difference in height that causes the exchange. So... if the switch fails I will have RO water pouring on the floor and down the drain. The sump will raise 1 inch higher which may drop the salinity to 1.024. My reef can live with that, and I can sleep at night.
If you look closely to the box you will see that I used silicone to seal the gap between the box and the sump. The right and left silicone blobs seal the nylon screws that hold the box. The center blob seals the hole that runs through the sump, it is far larger than the two little holes and will drain faster than the float can run wide open. I don't have this hooked up to the drain as its a cement floor in the basement with a drain nearby. If you had a sump upstairs or under the tank it could be hooked up to a drain and it would prevent any possible flodding dangers.
I'll attempt to explain it again as I know this can be confusing to read (but moronically simple to look at). If this float switch fails the RO water will fill this box up to the level of the drain hole in the side of box that runs out of the sump. That hole is about 1" higher than the water level is now. Now that the water is at a constant height of 1 inch higher than the sump it begins to fill it because there is a difference in the height on the box and the sump. However, once the levels are the same there is no expchange between the box and the sump. It is the difference in height that causes the exchange. So... if the switch fails I will have RO water pouring on the floor and down the drain. The sump will raise 1 inch higher which may drop the salinity to 1.024. My reef can live with that, and I can sleep at night.
