Min tremp for a RO unite

[m and m]

So i was just wondering is there a min temp for a RO/DI unite, i just made 40G of water and the water is ice cold, can cold water hurt the mem pad?

 

[MimicOcto8]

Good question M and M. I never thought about that but i seriously doubt it'll hurt anything. i've made a lot of water with mine for over two years now and the water gets pretty cold but i've never had a problem. Might be a question for the water store down the street from me.

 

[m and m]

I mean the unite has a warning on it that not to let it get to hot because the membrain can die but can it be to cold lol.

 

[pickupman66]

cold is not an issue unless it is allowed to freeze in the membrane causing it to stretch and fracture. you dont want to get it too hot because you can melt the membrane.

cold water just takes longer to go thru the membrane.

 

[m and m]

Are you sure about that, If you are thanks alot mine is ice cold but it does nto freeze.

 

[Michael7979]

cold is not an issue unless it is allowed to freeze in the membrane causing it to stretch and fracture. you dont want to get it too hot because you can melt the membrane.

This makes perfect sence to me. Do not know if there is an absolute lowest temp that should be avoided but you surely do not want it to freeze up.

 

[m and m]

This makes perfect sence to me. Do not know if there is an absolute lowest temp that should be avoided but you surely do not want it to freeze up.

i know freezing it would most likly crack the plastic, but i \t water comes from a line in my basment and it is freezing for some reason i dont know why.

 

[btkrausen]

I've always heard in the past that its best to have the water little warmer, say room temp, when going through the unit, as thats when the membrane works more efficiently. I remember people putting hot/warm water below their setup, and run the water through it first to warm it up.

 

[m and m]

I've always heard in the past that its best to have the water little warmer, say room temp, when going through the unit, as thats when the membrane works more efficiently. I remember people putting hot/warm water below their setup, and run the water through it first to warm it up.

Would you happen to know where you got that info from a artical or somthign? People saying it's fine to be this cold is shocking to me i thought it would have to be on the warmer side.

 

[btkrausen]

Man, that was on RC a few years ago, probably be able to search it out on there. I never did it, but I saw a bunch of people who did.

To me, it sounds like the same concept of having the proper water pressure. Too low of pressure doesn't allow the membrane to work at its most efficient level.

 

[pickupman66]

Is it turning to ice in the top off bucket? take a thermometer to it and you will be surprised. the water temp in the tap could be 40 degrees and feel ice cold to us. yet it still is not cold enough to do damage to the membrane. it just wont flow as well thru the membrane. I can noticeably tell a difference between summer and winter water with my RODI.

if the lines arent freezing down, I would say you are not damaging it, but it will take longer to make water. usually in the winter, I adjust to a 3-1 or 2-1 ratio for my system. I have only 50PSI at the faucet so I know I am not hurting it.

 

[btkrausen]

Is it turning to ice in the top off bucket? take a thermometer to it and you will be surprised. the water temp in the tap could be 40 degrees and feel ice cold to us. yet it still is not cold enough to do damage to the membrane. it just wont flow as well thru the membrane. I can noticeably tell a difference between summer and winter water with my RODI.

if the lines arent freezing down, I would say you are not damaging it, but it will take longer to make water. usually in the winter, I adjust to a 3-1 or 2-1 ratio for my system. I have only 50PSI at the faucet so I know I am not hurting it.

I would doubt it would be freezing in the bucket unless he's making it outside And if he is, more power to him, haha.

 

[m and m]

Man, that was on RC a few years ago, probably be able to search it out on there. I never did it, but I saw a bunch of people who did.

To me, it sounds like the same concept of having the proper water pressure. Too low of pressure doesn't allow the membrane to work at its most efficient level.

I mean im still getting zero TDS thats my only thing that makes me from doign somthign diffrent.

 

[m and m]

Is it turning to ice in the top off bucket? take a thermometer to it and you will be surprised. the water temp in the tap could be 40 degrees and feel ice cold to us. yet it still is not cold enough to do damage to the membrane. it just wont flow as well thru the membrane. I can noticeably tell a difference between summer and winter water with my RODI.

if the lines arent freezing down, I would say you are not damaging it, but it will take longer to make water. usually in the winter, I adjust to a 3-1 or 2-1 ratio for my system. I have only 50PSI at the faucet so I know I am not hurting it.

Yea just usedf my RK temp prob on a bucket of fresh made RO it came in at 23 lol i was shocked it went that low i knew it was cold though.

 

[swannyson7]

cold is not an issue unless it is allowed to freeze in the membrane causing it to stretch and fracture. you dont want to get it too hot because you can melt the membrane.

cold water just takes longer to go thru the membrane.

+1. I've never heard of cold water damaging a membrane, but I know hot water is bad.

 

[m and m]

+1. I've never heard of cold water damaging a membrane, but I know hot water is bad.

It has to be pretty hot to damage the membrane though i believe, well thanks for all the info guys, unless some one can come up with a artical or somthign saying cold water is bad.

 

[KingRicky]

The only negative about cold water is that the unit will not function as efficiently as with warm water. I know that mine works better when the water is between 70* and 80*. The cold water will result in more going to waste than when the water is warm and it takes longer to make.

 

[_Alex_]

i have been getting my water from the hospital i work at that has a 1000g perday RO/DI there water comes in anywhere from 42-60*, when the water is cold it makes the membrane get tighter, warmer water it gets a little looser there for you get water faster when its warmer. the guy that runs the ro unit tells me he has always got his best results with it 50-60*, he tryied it at 80* and it was harder for him to get his numbers right. there water comes out at 99% after evreythign is done.

 

[m and m]

thanks i guess ill keep running at this untill somthign else comes up. I do wonter if it shortens the membrane life though.