Question about RODI filter water consumption

brianbrennan

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Hey guys,

I was wondering about if I'm being paranoid about something or not. I currently live in an apartment building that has been sending out notices that there seems to be increased water consumption, and possible leaks, somewhere in the building. I currently own a 20g reef tank (which I have approval to have in the apartment). In order to do my water changes and such, I have an under-sink RODI filter that I own as well, and have had installed for a few months now. It's connect to the cold water line under the sink with just a simple T valve that I hooked up. Its just one of the BRS multi-stage RODI filter things. It has a waste water line and the RODI line, both of which I hook up to the sink and bucket respectively when filling, so there's no connection between the waste water and the pipe under the sink. Like if there was water flowing through it while we didn't realize, it would just pool under the sink (which it hasn't been). The water consumption ratio is listed as 20:1. When I do water changes, I only really ever do a 5 gallon bucket at a time. Between that and filling up my ATO, I probably average out about 3 or 4 5 gallon RODI water fillups a month. So that's about 3-400 extra gallons of water consumption a month. My quick math says that that should have like.... no affect on a building with 50+ units. It might affect my personal consumption by 10-20% from what I've looked up compared to the average but I don't think it has anything to do to me. I never specifically asked about hooking up the under-sink filter because I thought it really didn't warrant it, it was essentially just unscrewing something and that's it, but I kind of want a sanity check in case there's something I did sends up alarm bells to you guys. There's no leaks or anything in the system, and I imagine with the amount of water that it WOULD take to put a blip in the water consumption of a whole building, that's something that I'd notice pretty easily. This was a notice given out to the whole building, so its not like they think there specifically is a problem in our unit. I just want to make sure that I'm not causing a huge problem on accident.
 
Do you run your RODI unit overnight? I'm a leakage analyst in the water industry, and we usually concentrate on water consumption between the hours of around 2 - 5am. This is when domestic consumption is at its lowest, and the increased flow from leakage is easier to spot.
 
I don’t, hard to say exactly when I do it on average but I’d say during the day on weekends is most common. I don’t know the specifics of what level of water consumption they’ve been looking at in terms of whatever is spiking the consumption enough to check units for leaks, but they said to check for running toilets or faucets. Nothing in my rodi is hooked up to water out, I do that manually in the tub. I’ve checked for leaks many times, but I think even if there was one (which I’m very certain there isn’t), there would be a lot of water on my floor. Each time I do a bucket fill it also takes less than an hour, I think my filter is rated to 150 gpd
 
Probably not you they're looking for then. A leak causes an increase in consumption which stays increased until it is found and fixed. If the flow drops to its normal 2-5 am 'nightline' at some point they should not be looking for leakage. Unauthorised consumption is a different matter, but I assume you're authorised.
 
Probably not you they're looking for then. A leak causes an increase in consumption which stays increased until it is found and fixed. If the flow drops to its normal 2-5 am 'nightline' at some point they should not be looking for leakage. Unauthorised consumption is a different matter, but I assume you're authorised.
hah yes I am authorized. I figured that was the case but wanted some reassurance so I appreciate it.
 
20:1 ?? Are you sure about that? that doesn't seem correct to me.

My 100gpd RODI unit produced about 2.5 times as much waste water as product water. Not 20 times.

I don't think your RODI unit is the source of the water use issues in the bldg.
 
20:1 ?? Are you sure about that? that doesn't seem correct to me.

My 100gpd RODI unit produced about 2.5 times as much waste water as product water. Not 20 times.

I don't think your RODI unit is the source of the water use issues in the bldg.
wow yea youre... totally right. It's way less than that. I'm not sure where I got 20:1, it looks like mine is 3:1, so yea its definitely not even close
 
wow yea youre... totally right. It's way less than that. I'm not sure where I got 20:1, it looks like mine is 3:1, so yea its definitely not even close
Your RODI unit is totally not the issue in the bldg then.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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