Questions about my rodi system. (1 Viewer)

[ronin07x]

Hey guys. I just installed my first rodi system and the install went fine. Everything is connected correctly and the fitting are tight.

When I turn on the water supply there is a fairly load hissing noise coming from the system. If I open the flush valve the hissing goes away and water flows out into the drain at a much faster rate. I close the flush valve and the hissing noise continues.

I thought it was to flush valve and took the fittings on the ends out and put Teflon tape on it and tightened it good. But, the hissing is still there.
The rodi system is in the laundry room and with the door closed, I can here it in the living room still.
Is this normal for a rodi system?

I have the 4 stage BRS value plus system.

Thanks

 

[Reefahholic]

No, that is not normal. You need to figure out the source. To me, it does sound like something is going on with the flush valve or one of the connections.

The flush valve will make a loud noise when OPEN, but not when it's closed. Can you take some pictures of the unit and the flush valve.

Video would be good too.

 

[jskeen]

ok, the flush valve bypasses the restriction tube. with the valve open there is no pressure on the restrictor, and therefore, none on the DI membrane. With the valve closed, water has two paths, through the restrictor, or through the membrane. If there is a seal on the di membrane because it's new, then the restriction tube is the only outlet, and the excess pressure may cause the noise. Check and see if the membrane came with a storage seal or something.

You didn't mention a leak anywhere, So I'm assuming that with the valve open all the water is coming out the drain. if you close it and it starts whistling, do you get water out of the clean output line from the filter, into the resin stage?

If you have a tds meter, what does the clean output water read?

And, what part of town are you in?

 

[Reefahholic]

Sounds like jskeen is on to something.

 

[ronin07x]

There is no leak anywhere. I am getting clean water output. The tds is 0 out and 5-7 in from the water supply. Everything seems to be working as it should. All the chambers fill up and everything. Just an annoying hissing sound.
The pressure coming in is at 60. I live in Richmond area.

 

[jskeen]

ok, well, everything seems to be working, but the restriction tube should not make noise for any good reason I know of. I wonder what ratio the system is running at. Could have a wrong size tube for the membrane installed by accident. If you want to find out, put your waste line into a 5 gallon bucket, and the clean output into something you can measure. When the waste bucket hits 5 gallons, see how much clean water you have.

If nothing else, it will be good info to have when you call brs in the morning.

 

[jskeen]

Oh, if you don't have graduated buckets or some such, just weigh the empty containers, then weigh them again when full, the ratio is the same, and is what's important, actual volumes are irrelevant But just for grins. Pure water at 77f at sea level is 8.3 pounds per gallon. Now the stuff you are filtering out of the clean water is slightly heavier, so the waste will be a tiny bit denser, but using almost any normally available scale, the variation will be below the measurement threshold. If you have a scale around sensitive enough to detect the difference, the police would almost certainly be interested in knowing why

 

[Mark L.]

Can you tell about where the sound is coming from? Can you get your ear close enough to hear the different tubes? Sounds like the restrictor tube itself is making the noise. You may try a different one to see if that is it.

 

[Buckeye Hydro]

ok, the flush valve bypasses the restriction tube. with the valve open there is no pressure on the restrictor, and therefore, none on the DI membrane. With the valve closed, water has two paths, through the restrictor, or through the membrane. If there is a seal on the di membrane because it's new, then the restriction tube is the only outlet, and the excess pressure may cause the noise. Check and see if the membrane came with a storage seal or something.

Yeow. Seems to be some confusion here.

So no one gets confused:
There is no such thing as a DI membrane. There's an RO MEMBRANE, and a DI RESIN CARTRIDGE. Water that goes through the RO element, but not through the semi pereable RO membrane within the element goes out the waste water tube. With the flush valve closed, waste water must go through the flow restricitor.

Russ