Warming RO water?

[Richard_Dicosimo]

im not certain but im sure that i read your ro unit will work better with cold water then hot so dont tap your hot water line.

Richard

[Gools]

RO membranes are suppose to produce better around 77degrees water temp. I'm getting major condensation on all my RO lines, which has never happened before, so my water is very cold, which will cause you to lose performance. Right now I am getting around 80 psi to my membrane.

[KrazyKuch]

Correct they work best in that 25 degree Celcius temp range and the last time I checked the temp of the water coming out of my tap it was like around 16 degree's celcius

[Black Phantom]

This might not work for everyone but I run my supply line through my sump.Being that I heat the water for the tank I figured why not use it. I also make sure I do a five minute flush of the membrane once a week. It seams to add to the life of my RO.

[Gools]

I like the sump idea, only problem is the distance from my RO to sump, would have to travel on the ceiling, then have alot of tubbing in the sump. Would I lose alot of pressure running 50 feet or more of tubing before the water even hits the RO unit?

[littlesilvermax]

Originally Posted by Gools

I like the sump idea, only problem is the distance from my RO to sump, would have to travel on the ceiling, then have alot of tubbing in the sump. Would I lose alot of pressure running 50 feet or more of tubing before the water even hits the RO unit?

I tried it with 1/4 RO line, lost a lot of pressure.

I now have 100 feet of 3/8 RO line ($12) and run it in a coil in the sump. It cools my tank and heats the water used for RO. My TDS went down, my fan over my sump runs a lot less, all good stuff.

I highly recommend it.

[Skimmerking]

Nigel you can always get a heater joint that attaches to your water line before it goes to your membrane. that hook on the copper pipe and its on a gauge to tell you how warm you want the water , works really good i havent tried one yet thou i may once i get back from over sea........

[Gools]

Originally Posted by littlesilvermax

I tried it with 1/4 RO line, lost a lot of pressure.

I now have 100 feet of 3/8 RO line ($12) and run it in a coil in the sump. It cools my tank and heats the water used for RO. My TDS went down, my fan over my sump runs a lot less, all good stuff.

I highly recommend it.

how much pressure did you lose after running the 100 feet of 3/8 line?

[JDigital]

Originally Posted by KrazyKuch

Correct they work best in that 25 degree Celcius temp range and the last time I checked the temp of the water coming out of my tap it was like around 16 degree's celcius

Agreed, Definitely needs to be warm... There is a build thread I was watching on another forum, and the guy is in colorado and his RO in line was sooo cold that his RO was produing VERY little water... Was more of a drip that a constant flow.. I think it took him close to a full week to fill 140G tank.

[Black Phantom]

Since this last came up I have taken the line out of my sump. It was just too hard to keep the tank temp up. I looked around for a constant heat supply and decided that my MH ballast would work just fine. My ballasts have the metal fins for cooling. I just ran the water line back and forth under the ballasts. I'm not sure how much my line temp has risen but it's definately warmer to the touch. And it keeps my ballasts a little cooler as well so thats a bonus. Of course it only works during the day but what the heck, it's free heat.