RO reclaim question

[keniniowa]

Thinking about building an RO reclaim tank and using it for high pressure rinse.

My plan is to build approx 100 gal tank and mount it above my current tanks. The HP tank has two 1" inlets one of which is currently blocked off. Run 1" line to that inlet and use a hydrominder to control the flow.

Anything wrong w/my plan? Like maybe gravity flow is too slow compared to city pressure and it won't drain the tank.

Is there a TDS number at which point you wouldn't use that water for HP rinse?

thanks Ken

 

[MEP001]

A Hydrominder won't work. It needs at least 5 PSI behind it to make it close, and it won't flow well without pressure behind it. Use a single-action float valve, like a 1" BOB valve that will let maximum flow and uses only the flotation of the ball to close it. Otherwise, your plan is sound.

If you're mixing in only a portion of RO reject into your main water you will see no major change in the TDS.

 

[waright]

ken, a suttner float valve works great, under $15. you need to only plumb a 1/2 inch line to it. Your tank above needs to have at least a 1 - 1 1/2 inch overflow line in case the tank gets full. you don't want it to flood your other tanks or equipment. I don't check tds of rinse water, however i do check it using a hardness test kit. Usually my soft water is 0 and when i check the rinse water with the ro reject it is 0-1 drop (grain).

 

[I.B. Washincars]

Something that would be much simpler would be to stop using the original tank altogether. Run the current 1" line to the new tank. Run the current filling apparatus (whatever that may be) to the new tank. Set it to be at 20 gallons or so, or whatever you feel is necessary to maintain the wash if no reject is available. Voila, you now have room for 80 gallons of reject water and don't have any extra overflow worries by trying to move water from one tank to another. You have the same set-up that you had before, only a larger tank.

 

[Bubbles Galore]

Great idea that I would like to replicate at my wash. I don't know for sure how though, since to get the water in the tank I would need some type of booster pump to go from my reject line to the tank. Any suggestions?

 

[MEP001]

You don't need a booster pump if you can mount the reject tank above your self-serve tank. If you can't and you want something simple, use a reed switch to control air to a FloJet pump running at a low pressure.