Rodi psi

[giulianom]

I've started making some RODI water with my new unit, and the pressure gauge sits at 20 PSI when its running.

I have a 4-stage with a 150GPD membrane...

Inlet and outlet tubing is 1/4"...


Is 20 PSI enough, or should I invest in a booster pump?

 

[lilrobb]

Mine is 80 and works phenomenal, I doubt your house only gets 20psi.
Clogged filters maybe, or maybe a pressure reducer somewhere?

 

[giulianom]

Brand new RODI, somehow doubt the filters are clogged.

The water is fed from a sink faucet, reduced down to 1/4" tubing...

 

[crewdawg1981]

I think that you need a minimum of 40 PSI to run a RODI unit effectively? May want to check with the manufacturer to be sure.

Would absolutely consider a booster pump not just to help the unit run more efficiently, but cuz you'll produce WAY more water much faster with it.

 

[grouper therapy]

GiulianoM;691722 wrote: Brand new RODI, somehow doubt the filters are clogged.

The water is fed from a sink faucet, reduced down to 1/4" tubing...

Many faucets have water saving restrictions in them. I think the best PSI is somewhere around 60. If the logistics allow you can tap in to the main water supply line before the pressure regulator . The 1/4'" line is not the problem.

 

[giulianom]

That's probably it - the faucet.

The RODI unit will eventually be plumbed directly to a main water pipe, so I'll see what the water pressure is like then.

I was filling a 32G Brute for an initial batch of live rock...

 

[acroholic]

Booster pump running mine at 84 PSI.

 

[grouper therapy]

Acroholic;691765 wrote: Booster pump running mine at 84 PSI.

I run mine right at 90 psi as well but I got lucky and have that coming into the house, of course before the regulator

 

[smallblock]

I run mine at 38 to 40 no booster, 20 is to low though seems like i heard that it will damage the ro membrane or it either cant work correctly at the lower psi

 

[mr difficult]

mine runs off a line going to the faucet and I still get over 60 . However I would plumb in after the regulator in my opinion ,but you could ask 100 different people and they all have something different to say.

 

[grouper therapy]

I listened to the ro membrane manufacture.

 

[buckeye field supply]

GiulianoM;691720 wrote: I've started making some RODI water with my new unit, and the pressure gauge sits at 20 PSI when its running.

I have a 4-stage with a 150GPD membrane...

Inlet and outlet tubing is 1/4"...


Is 20 PSI enough, or should I invest in a booster pump?

Unfortunately, 20 psi isn't enough. 40 psi could be considered a practical minimum, and depending upon the brand of your membrane, they are factory spec'ed at 50, 60, or 65 psi.

You rec'd some good advice above - its unlikely you house only has 20 psi. Rather than using a faucet adapter, you might want to think about using one of these under your sink. Will take all of 10 minutes to install:

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Russ

 

[schwaggs]

That tap/valve is a great idea! It will avoid any restrictions in the sink faucet and is easy to install!

I have mine hard plumbed and it runs flawlessly at ~60 PSI that my house is running (after regulator). I recenntly swapped out my 11 year old RO membrane with a new one and am enjoying VERY speedy water production again! :yay:

 

[giulianom]

Thanks for the suggestions - I will see if I can pick up a under-sink tap like BFS recommended.

Also, the 20 PSI is with the water running... if I put my thumb over the output hose, the PSI goes up to about 40 PSI...


I'll pick up a normal PSI gauge so I can check the pressure at one of the outdoor hose spigots, those are plumbed in before the pressure regulator.

And I'm guessing that this is the pressure regulator:

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[nholderried65]

i get bad psi and im in Lawrenceville...i think it right around 25-30 now

 

[giulianom]

As it turns out... A RODI system works a LOT better when you actually install the RO membrane...

 

[buckeye field supply]

Ha! You're not the first!

 

[giulianom]

Now I get 40PSI at the faucet.

It'll do until I get it permanently hooked up...


Though I may have to replace the resin chamber sooner rather than later...

It's about 1/4 used already, and I've only put 80-100 gallons through it.

 

[hammcd]

GiulianoM;700960 wrote: As it turns out... A RODI system works a LOT better when you actually install the RO membrane...

lol nice...just curious what brand RODI is it?

 

[giulianom]

House brand at SEA Atlanta.