Booster pump for r/o unit

Bowhunter4250

Bowhunter4250

Active member
I currently have a brs 6 stage r/o d/i 75 gpd. Unit , it is very slow at filling a 75 gallon holding tank at 60 # of pressure on my gage ....
If i add a booster pump will this make water faster ? And if so will it decrease the waste amount at all ?

I have this unit in my basement in my fish room and ive also noticed that from the point of my valve down to the water meter there is condensation on my water pipe , but from the valve backwards nothing ?? I know the valve isnt leaking because there would be water on the floor and not the length of pipe ?? Ideas to why this is happening ??

Thanks
 
Bowhunter4250 said:
If i add a booster pump will this make water faster ? And if so will it decrease the waste amount at all ?
Click to expand...

Yes, without a doubt it'll produce water faster. It will not affect waste ratio unless you change the restrictor.

Bowhunter4250 said:
I have this unit in my basement in my fish room and ive also noticed that from the point of my valve down to the water meter there is condensation on my water pipe , but from the valve backwards nothing ?? I know the valve isnt leaking because there would be water on the floor and not the length of pipe ?? Ideas to why this is happening ??
Click to expand...

My pipes condensate as well when making water in winter, but none in summer.
 
Condensation is normal around this time of year and I installed a booster on mine and what a difference it made

Sent from my SPH-D710VMUB using Tapatalk
 
A booster pump is my next piece of equipment. I'm getting about 38-42 # right now, and that's obviously not enough. Takes forever to make water. I just changed my pre-filter and carbon block, hoping that this would improve things, but now such luck. Booster pump it is.
 
rozdab said:
booster pump is awesome. Used to take me about 8 hours for 5 gallons of ro. Now i can do 5 gallons in 2 hours. Pump is a little noisy but not bad.
Make sure u pick one of these up for it to and install it right b4 the pump as it will help keep sediment out of the pump.
http://www.bulkreefsupply.com/catalog/product/view/id/2291/
Click to expand...


thats awesome ! Thank you , ill def. Get one of these and start looking for a booster pump !
 
jrpark22000 said:
It will not affect waste ratio unless you change the restrictor.
Click to expand...
Adding pressure WILL change the waste to permeate ratio, just as changing the feedwater temperature will. But regardless of the water temp and pressure, you want to shoot for something close to a 4:1. The ratio is easily adjusted by changing your $4 flow restrictor.

Russ
 
We recommend placement of the pump AFTER the prefilters. There's good reason for this. Here's some diagrams - the first configuration is controlled by a high pressure switch, and the second by a low pressure switch:





Russ
 
Buckeye Hydro said:
Adding pressure WILL change the waste to permeate ratio, just as changing the feedwater temperature will. But regardless of the water temp and pressure, you want to shoot for something close to a 4:1. The ratio is easily adjusted by changing your $4 flow restrictor.

Russ
Click to expand...

Thanks for the correction Russ. What sort of percentage change in waste ratio is to be expected? When adding a booster to mine I didn't make a restrictor change yet was still at 4:1.

Our water in chicago for the most part has a 165 TDS as it comes from the big lake. I've been informed that a 2:1 ratio is acceptable with such low TDS and it would not have a significant impact to membrane life. What are your thoughts?
 
I don't have any specific data in that regard - but for instance the other day I was working on a 10,000 gpd RO system. Every change I made in pump pressure changed the waste water flow (which was on a flow meter so it was easy to see.

Higher pressure will make more water go through the membrane - so that means less water will go out the concentrate (waste) line.

Feedwater TDS is not really the issue to focus on - hardness is important, as well as the presence of some specific contaminants like Mn and Fe (you won't have these in lake water) that foul the membrane. LSI is a nice measure to give you a feel for the likelihood of your water scaling the membrane - but bottom line the proof is in the pudding - try a lower ratio and see how it works for you. Back in the old days when membranes ran $100 I probably would try it. We have customers in the NYC and Atlanta area for instance that can get away with all sorts of stuff - their feedwater is < 50 ppm.

Had a customer a while back with feedwater at 2400 ppm! Can you imagine?

Russ
 
[MENTION=1014]Buckeye Hydro[/MENTION]

Thanks Russ. Even from summer to winter on my setup the vairance in waste ratio is neglegable @ 80psi on the membranes. I've had a dual membrane setup at 2:1 since July 2012 and make between 40-60g a week. So far no problems, but I still wonder how long I'll get on the membranes. Do you have any data on what LSI ranges are best at different waste ratios? With so many of the locals running Lake Mi water this really could help a lot of people save some money and waste water.

Local (tinely park) municapal water analysis, 100% Lake Mi water.
http://www.tinleypark.org/DocumentCenter/Home/View/91
iron <7 Fe, μg/L
manganese <2 Mn, μg/L
LSI (0.52) Units +/-

http://www.lenntech.com/calculators/langelier/index/langelier.htm
For anyone on different water to calculate their own.
 
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