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Water Bill and RO Waste Water
- Thread starter rshiggaon
- Start date
There is no such thing as "normal" in my opinion. Too many variables from wash to wash; such as s/s volume, nozzle size on wands, pressure on wands, iba volume, type of iba, etc.
What is your cost per 1000 gallons; this is what most compare. My locations average about $10.00 per thousand gallons on water/sewer.
I do use RO reject in my auto rinse cycle, just before spot free rinse. I experimented using it on s/s rinse, but far too many folks would not use spot free rinse at the end, and it would spot their vehicle pretty good. So I only use on auto rinse, where I know it is followed by SF.
What is your cost per 1000 gallons; this is what most compare. My locations average about $10.00 per thousand gallons on water/sewer.
I do use RO reject in my auto rinse cycle, just before spot free rinse. I experimented using it on s/s rinse, but far too many folks would not use spot free rinse at the end, and it would spot their vehicle pretty good. So I only use on auto rinse, where I know it is followed by SF.
MEP001
Well-known member
My 6 bay SS water bill is about $1600 a month, so yours sounds pretty typical of the area. I do not reuse the RO reject because I don't have a place for another tank, but I plan on building a loft in the room for one. San Antonio requires the RO reject to be recovered and used.
traveler17
Well-known member
As mentioned above there is no such thing as normal. I have a slower wash in a rural town that’s water/sewer bill is friggin ridiculous, runs around $1k per month. My other wash washes almost 4x the amount and water bill is less than half of the other. I catch the Reject water at slower wash
What do you do with the rejected water?
Thanks. What you plan to use the rejected RO water?
traveler17
Well-known member
Same as washnvac. Use in the IBA only. Not in the SS.
Roz
Well-known member
Can only compare on a cost per 1000 gal basis given the variables. We pay $10/1000g for water plus x1.4 times that number for sewer. No meter for sewer and town will not listen to an study that 40% of water in a carwash does not go down the drain. We reclaim RO reject water to feel good but not a huge savings.
MEP001
Well-known member
I will use a float valve in the main water tank so the reject can flow via gravity. I've seen systems using a well pump to run it into the rinse line, but I'd rather keep it uncomplicated. I've already written a ladder program for a relay to control the RO system where I added an interlock to stop RO production if the reject tank gets full, with a second switch in the RO tank to override the interlock if the RO storage gets too low.
