Staighten RO Tubing

[Buckeye Hydro Verified Sponsor]

A long 1/4" concentrate (aka waste water) tube will act as a tighter capillary flow restrictor and will:
decrease the waste water to purified water ratio
increase the pressure on the membrane
result in faster permeate production

When all is said an done, just make sure your waste water to purified water ratio is around 4:1, assuming you don't have soft water.

Russ

 

[NowGlazeIT]

It’s not just a drain line it’s a pressurized drain line. Tho whole unit is full of pressure in each chamber and said pressure forces water through all the lines including the drain so yes the more tubing the more pressure consumption. Just try it. Very simple test

 

[Saltlife]

"In fluid flow, friction loss (or skin friction) is the loss of pressure or “head” that occurs in pipe or duct flow due to the effect of the fluid's viscosity near the surface of the pipe or duct.[1] In mechanical systems such as internal combustion engines, the term refers to the power lost in overcoming the friction between two moving surfaces, a different phenomenon."

I'm familiar with friction loss. I don't have any patents, I'm not fluid mechanics engineer, nor a chemist. I'm just a 40 year old retired cop that's far from dumb who took up reefing to get my mind off things lol. It's hard to read a post and determine the persons demeanor because we are typing and not talking. This is a good debate and someone should test it to find out. But here's the definition per the site you provided above. It says " loss of pressure" the whole page talks about pressurized systems that are far different than a Rodi unit that produces 75 gallons a day at best. Let's say you put a 20' hose on your house and turn it on a little around 75 gallons per day, not at full pressure. Full pressure friction loss is there and will lose head pressure. Fill a bucket. Now put on a 100' hose without turning the water off or changing the water, it will be the same. At full blast there is pressure and enough friction loss to lose of head pressure and bucket fill time will be different. Still big difference between pressure system and Rodi unit.

Also don't nail down any of the line running in the wall. If you ever have a problem you can't get it out if nailed down. If it's free you can attach on another line and pull it through the wall.

 

[NowGlazeIT]

If your not getting at least 75gpd something might be wrong.
I use a 75gpd by brs 6 stage
Psi @60
I make 5 gallons every 1hour and 20min
But in the summer that drops to 5 gallons every 1:11-1:15..it gets pretty hot out
All Tubing leads are between 5-8feet

 

[Saltlife]

It's just an example I never said my unit produces nor does it matter.

 

[KSReefing]

Test is underway

 

[KSReefing]

BRS 5 Stage 75 GPD Plus

Psi 65

3 feet waste line - 1 hr 23 mins
45 feet waste line- 1 hr 35 mins

5 gallons

 

[Saltlife]

12 mins that's more than I thought it would be. That's not much but it still effects the flow. Was the 45' line straight or coiled up? Learn something new everyday. Thanks for taking the time to test that!

 

[NowGlazeIT]

BRS 5 Stage 75 GPD Plus

Psi 65

3 feet waste line - 1 hr 23 mins
45 feet waste line- 1 hr 35 mins

5 gallons

Your a boss!! Thank you for sharing

 

[Gmj4409]

Great discussion. Does the same hold true for the clean water line? I have short input & waste line but a long (60’) output line. Thanks

 

[NowGlazeIT]

Great discussion. Does the same hold true for the clean water line? I have short input & waste line but a long (60’) output line. Thanks

Yes the longer the output line the longer overall production time. Given that you are comparing the two with the same psi and unit position

 

[KSReefing]

No problem. It was coiled up. I don’t really have an option to run the waste line anywhere else so it will have to do. Still produced 0 TDS which is all I need. May have more waste water but again I don’t really have another option.

 

[KSReefing]

Since I was so proud of myself for running the test I rewarded myself with a nice pair of lightning clowns from a LFS. Special of $29.99 each

 

[NowGlazeIT]

Since I was so proud of myself for running the test I rewarded myself with a nice pair of lightning clowns from a LFS. Special of $29.99 each

Lucky dog! I paid 80 for 1! Hah

 

[KSReefing]

Lucky dog! I paid 80 for 1! Hah

I know I couldn’t believe it. They had black snowflakes for 29.99 as well. Heck of sale they had going!

 

[don_chuwish]

If you want that 12 minutes back you could always immediately change from 1/4" tubing to 3/8" or 1/2" and do the long run at the larger diameter.

 

[Buckeye Hydro Verified Sponsor]

If your waste water tube is longer, you should get higher pressure at the membrane, and FASTER production of RO water.

Longer RO/DI outlets tubes are not much of an issue as the water barely dribbles out - the pressure is so low.

Russ

 

[Airwarf]

Ok....works for Florida.....what about Cleveland in Feb lol??

If you want to snap it like peanut brittle just do the same thing!

I'd say if you're really about straightening it out do the same thing inside with a hairdryer. Heat it up, let cool, and it should be straight(er).

 

[Buckeye Hydro Verified Sponsor]

Guys - just run some warm water through it!

Russ

 

[Waters]

If you want to snap it like peanut brittle just do the same thing!

I'd say if you're really about straightening it out do the same thing inside with a hairdryer. Heat it up, let cool, and it should be straight(er).

I actually don't need to straighten out anything.....just though the original post was funny since he lived in Florida