RO/DI Water Making Benchmarks

[Widdy]

Hi Folks,

I'm curious what kind of times are you guys getting in making RO/DI filtered water? I know some of us are filtering in a big vat/bucket with a float switch, pretty much a set 'n forget setup. But being in an apartment I have do it in 5g buckets.

Chatted with Jim of The Filter Guys, and I told them I was making 5g in approximately 1 hour 45 minutes. Jim said that's pretty good time, normal production is usually 2.5 hours. But I wanted more... so Jim suggested I add a 2nd (75gpd for me) membrane to double production. Order and installed, and got a 5g bucket in about an hour! However my water pressure was 50psi which is below the recommended amount of 65psi. Was told at those pressures, I can potentially cause both my membranes to fail early. Today, I added a Actiontec 8800 booster pump giving me about 90psi, and I'm getting 5g in 40 minutes! Also bringing down the clean to waste water ratio to 1:1.5 or thereabouts. To me that's a fire hose compared to what I was getting before... granted total upgrade was about $200. It's $200 well spent in my opinion.

Curious what everyone else is doing?

Oh and my Jersey City tap TDS on the input is approximately 140-150TDS, read off dual inline meter and Liquatec PM-3000 handheld.

 

[NYreefNoob]

fortunate i have really good water pressure and produce 18g in about 3-4 hour's pending temp i run water at, seems too get a little more when water isnt turned on completely to the cold side

 

[Widdy]

fortunate i have really good water pressure and produce 18g in about 3-4 hour's pending temp i run water at, seems too get a little more when water isnt turned on completely to the cold side

Cool, good to hear ya chime in Rick. I'm using a faucet adapter, so put a thermometer under the water and try to get it to 75*F, as I was told 77* is optimal.

 

[OzoneParkGuy]

fortunate i have really good water pressure and produce 18g in about 3-4 hour's pending temp i run water at, seems too get a little more when water isnt turned on completely to the cold side

Doing that can cause your membrane to expire sooner... WHY? Because more contaniments are stored in the hot water heater. Take a reading in cold water, then do the same for your hot. What were your readings?

Glad to hear this worked in your favor widdy! now i can borrow some from you when I run out!!

 

[Widdy]

Doing that can cause your membrane to expire sooner... WHY? Because more contaniments are stored in the hot water heater. Take a reading in cold water, then do the same for your hot. What were your readings?

Glad to hear this worked in your favor widdy! now i can borrow some from you when I run out!!

Good point, Noel. Let me take a TDS reading of both my hot and cold water.

Any time bro! But JC is a bit of a trek for water. :lol2:

 

[NYreefNoob]

my sink ater is alot colder then 77 degree's reason i do it, and yes i knew about using some of the warmer water will increase sediment amount, if i go straight cold water takes me about 7 hr's to get the same amount of water made up

 

[InfernoST]

I'm getting around 3 gallons per hour during the day and about 4 at night when the pressure is higher.

 

[DA fisherman]

Since we on the topic .....what brand is good ??? Or has anybody heard of water General ???


Sent from my iPhone using Reefs

 

[rkaragozler]

I use this before my ro/di unit

 

[Widdy]

Is that a sediment filter of some sort?

 

[rkaragozler]

Yes it's 20 micron, then it feeds into a 5 micron, the 20 micron catches pretty much everything before the 5 micron. It also temperature regulates the water to 75 degrees

 

[Widdy]

Yes it's 20 micron, then it feeds into a 5 micron, the 20 micron catches pretty much everything before the 5 micron. It also temperature regulates the water to 75 degrees

Wow, that's excellent. You put a lot of thought into it...

 

[rkaragozler]

Thanks, Widdy I also use rodi from jim