DI cylinder water level

[MrCurlyman]

Hello, I'm new to RO/DI systems. I picked up a used 4 stage unit with a pump and gauge installed on the unit. My question is the cylinder that holds the DI resin container is only half full of water. Is that normal? it seems to be working ok, the pump pressure is around 50psi and not ever using a RO/DI system before im not sure if that right.

 

[MrCurlyman]

here's a pic

 

[Ricox]

Mine is usually fully full you might need to turn the water flow input up higher. But it doesn't really matter as long as it still working but the ro water might come out slower.

 

[Woodyman]

Don't worry it's fine. Half full isn't an issue.

 

[Woodyman]

Also appears you have a new system so it may fill higher once all the air has been purged. In either case it will not affect the quality of the water.

 

[MrCurlyman]

Mine is usually fully full you might need to turn the water flow input up higher. But it doesn't really matter as long as it still working but the ro water might come out slower.

It's as high as it will go, i think. I'm on a well and the gauge says 30-70 psi and it goes right into the system without a regulator on the input. the gauge on the unit says 50psi going into the membrane. I'm not sure what the output stream should look like. It's a trickle, is that normal? it's a 100 gal a day unit.

 

[MrCurlyman]

Also appears you have a new system so it may fill higher once all the air has been purged. In either case it will not affect the quality of the water.

Awesome thank you...... Its used but not much, I did put all new filters in it.

 

[Ricox]

It should be just a trickle.

 

[homer1475]

You should turn the pressure up on the pump. Should be a little screw in the top of the pump body near the output.

Pic's of pump, and we can tell you were the adjustment screw is.

You ideally want between 65 and 90 PSI. The higher the pressure, the faster you will produce water, up to a point. Above that pressure and you risk damaging the RO membrane.

If you up the pressure, you'll get a little more then a trickle out of the output.

And yes, it's completely normal for a new installed system to have trapped air in the DI canister. It will purge out with use.

 

[Woodyman]

You should turn the pressure up on the pump. Should be a little screw in the top of the pump body near the output.

Pic's of pump, and we can tell you were the adjustment screw is.

You ideally want between 65 and 90 PSI. The higher the pressure, the faster you will produce water, up to a point. Above that pressure and you risk damaging the RO membrane.

If you up the pressure, you'll get a little more then a trickle out of the output.

And yes, it's completely normal for a new installed system to have trapped air in the DI canister. It will purge out with use.

It's actually not the membrane you risk damaging, it's the filter housings and fittings. Membranes love pressure and the higher the pressure the more efficient they work (temperature plays into this as well). Most housings and systems aren't rated for >100psi which is why it's recommend to stick to the 80-90 range.

 

[Woodyman]

Awesome thank you...... Its used but not much, I did put all new filters in it.

Hopefully you didn't flush your carbon block into the RO membrane...

 

[Woodyman]

Hopefully you didn't flush your carbon block into the RO membrane...

Carbon fines are a good way to prematurely age a membrane. Not something you want to do if you can help it.

 

[MrCurlyman]

Hopefully you didn't flush your carbon block into the RO membrane...

I did not. I bypassed for 20 min

 

[MrCurlyman]

You should turn the pressure up on the pump. Should be a little screw in the top of the pump body near the output.

Pic's of pump, and we can tell you were the adjustment screw is.

You ideally want between 65 and 90 PSI. The higher the pressure, the faster you will produce water, up to a point. Above that pressure and you risk damaging the RO membrane.

If you up the pressure, you'll get a little more then a trickle out of the output.

And yes, it's completely normal for a new installed system to have trapped air in the DI canister. It will purge out with use.

I don’t see a adjustment on the pump

 

[Woodyman]

I don’t see a adjustment on the pump

What's the model # on that pump? I don't see it in the photo.

 

[Woodyman]

I did not. I bypassed for 20 min

20 minutes is more than enough!

 

[MrCurlyman]

20 minutes is more than enough!

I don’t see one. This is the only other sticker on the pump

 

[Woodyman]

I don’t see one. This is the only other sticker on the pump

From that I'm going to guess it's from 2013. It might not be adjustable, usually if they aren't they are set to 80psi. Age could have reduced the output over the years.

 

[Woodyman]

I don’t see a adjustment on the pump

Do you see any Allen screws anywhere on the pump, that's usually how they adjust.

 

[MrCurlyman]

From that I'm going to guess it's from 2013. It might not be adjustable, usually if they aren't they are set to 80psi. Age could have reduced the output over the years.

yup. I agree. earlier I did a test on the pump. I put the feed line on the pump. On the output i put a 1/4 turn ball valve, as i slowly closed the valve the pump gauge went to 80psi. Thank you for your time.....