Ro-unit Help!

[xxBarneyxx]

I finally got around to setting my RO unit up. It is working but is only producing about 1GPH. Pressure is 90lb per square inch. It is supposed to be 75gph. Any ideas?

There has to be something wrong somewhere?

 

[AK77]

I think you'll find its 75GPD That's per day... not per hour lol.

 

[xxBarneyxx]

LMFAO

I cant beleive how stupid I'am

Thanks mate!

 

[AK77]

lol nah, I was the same. I hooked mine up and was like..... "Hmmm ok... why am I geting a trickle coming out of the end of this thing??"

I wish it was 75GPH lol. I wouldn't have to leave the sodding thing on for hours at a time then!

 

[Musho3210]

well dont expect 75gpd, thats only at its maximum peak of something like 70 psi at 77 degrees F before it actually makes 75gpd. My 100gpd unit makes 20-30 gallons a day.

 

[AK77]

BTW is there a recommended PSI for your RO unit? Mine only hits 35psi from the mains tap pressure. 90 sounded a bit on the high side?? You can knacker the filter if its too high or it wont filter as well. It may be fine at 90 PSI, but just check to make sure.

 

[Musho3210]

70-90 psi is i think peak condition (which is good)

 

[xxBarneyxx]

Membrane pressure range is apprently 40-125PSI.

Works out about 25gpd which still seems a little low given that it has decent prssure but the water is really bloody cold which probably slows things down quite a lot.

 

[Musho3210]

there is a way of heating the water, get some LONG RO tubing and put it on the water source to the unit line. Then get a bucket, fill the bucket with water, heat the buckets water to something like 78 degrees with a submersable heater, put the RO tubing line in the bucket of warm water. This will heat up your water.

 

[SkiFletch]

Good suggestions thus far. As you're figurin out Barney, pressure and temperature matter a lot with RO unit operation. One word of caution, never put hot tapwater through the unit... Hot tapwater poses 2 dangers: First, it has lots more nasty stuff in it that can degrade your membrane and pre-filters quicker. Second, if you do get a surge in pressure and too much hot water going into the membrane, you can literally cook the plastic inside it if it gets too hot.