RO/DI making high pitched hum

Sophie-G · 03/30/2008, 09:16 AM

My RO/DI is making a high pitched hum at start up...

I have a auto shut off hooked up with a check valve with a line going to my sump (auto top off)

The unit is connected to my main water line (3/4") with a saddle valve (needle valve)

Only about 2 weeks old...

The hum is getting really anyoning because it happens every 10 mins...

Why is it dong this...?

Michael · 03/30/2008, 09:18 AM

i have never heard this before, the only thing i can suggest is a air bubble somewhere in the filter membrains, or very high water pressure and the unit is vibrating, the second suggestion is very unlikely, sorry scrub that thought, could be air though, just a thought

Sophie-G · 03/30/2008, 09:28 AM

THe unit has a pressure gauge that is reading 50 psi when it turns on and is running...

It sounds like this is when the water is moving through the unit at startup

Michael · 03/30/2008, 09:30 AM

thats good pressure, i think most units recommend a minimum 40 psi for it to work properly, could just be air though

cczarnik · 03/30/2008, 09:42 AM

It's the auto shut off valve.

Sophie-G · 03/30/2008, 09:43 AM

that's what I was thinking...

???

Sophie-G · 03/30/2008, 09:44 AM

Quote:

Originally posted by cczarnik
It's the auto shut off valve.

not opening quick enough?

Michael · 03/30/2008, 10:27 AM

you have posted this on new to the hobby as well, one of the reef team members azdesertrat recons over the many years he has had problems with noise as well, he suggests shaking the unit a little bit to release any trapped air, i think he knows what he is talking about, it may be worth you speaking to him on new to the hobby forum

cczarnik · 03/30/2008, 11:06 AM

Sorry about my brief msg before, had to leave the computer..

Mine does this, it's the auto shutoff that sits between the water supply and controls the source. (the valve that has 4 pipes going into it). Sometimes it will be a high pitch wine, other times a low vibration that rattles through the whole wall. I've never tried to solve, just got used to it. Maybe it is air?

For reference my system is a water general / filter direct unit.

03/30/2008, 09:16 AM	#1
Sophie-G Registered Member Join Date: Jan 2008 Location: London, ON, Canada Posts: 115	RO/DI making high pitched hum My RO/DI is making a high pitched hum at start up... I have a auto shut off hooked up with a check valve with a line going to my sump (auto top off) The unit is connected to my main water line (3/4") with a saddle valve (needle valve) Only about 2 weeks old... The hum is getting really anyoning because it happens every 10 mins... Why is it dong this...?

03/30/2008, 09:18 AM	#2
Michael NTTH Rookie Help Join Date: Jan 2008 Location: Gloucester, England,UK Posts: 7,808 Blog Entries: 6	i have never heard this before, the only thing i can suggest is a air bubble somewhere in the filter membrains, or very high water pressure and the unit is vibrating, the second suggestion is very unlikely, sorry scrub that thought, could be air though, just a thought __________________ Don't be afraid to ask questions, we in the new to the hobby are here to help you [For My Tank Spec,Photo Album,Articles and website, click on my name] MY Very Kindest and Warmest Regards , MIKE Current Tank Info: I have a 92 gal Corner Tank, and way too many pieces of equipment to list really, (proud member of the reef central corner club)

03/30/2008, 09:30 AM	#4
Michael NTTH Rookie Help Join Date: Jan 2008 Location: Gloucester, England,UK Posts: 7,808 Blog Entries: 6	thats good pressure, i think most units recommend a minimum 40 psi for it to work properly, could just be air though __________________ Don't be afraid to ask questions, we in the new to the hobby are here to help you [For My Tank Spec,Photo Album,Articles and website, click on my name] MY Very Kindest and Warmest Regards , MIKE Current Tank Info: I have a 92 gal Corner Tank, and way too many pieces of equipment to list really, (proud member of the reef central corner club)

03/30/2008, 10:27 AM	#8
Michael NTTH Rookie Help Join Date: Jan 2008 Location: Gloucester, England,UK Posts: 7,808 Blog Entries: 6	you have posted this on new to the hobby as well, one of the reef team members azdesertrat recons over the many years he has had problems with noise as well, he suggests shaking the unit a little bit to release any trapped air, i think he knows what he is talking about, it may be worth you speaking to him on new to the hobby forum __________________ Don't be afraid to ask questions, we in the new to the hobby are here to help you [For My Tank Spec,Photo Album,Articles and website, click on my name] MY Very Kindest and Warmest Regards , MIKE Current Tank Info: I have a 92 gal Corner Tank, and way too many pieces of equipment to list really, (proud member of the reef central corner club)

03/30/2008, 09:28 AM	#3
Sophie-G Registered Member Join Date: Jan 2008 Location: London, ON, Canada Posts: 115	THe unit has a pressure gauge that is reading 50 psi when it turns on and is running... It sounds like this is when the water is moving through the unit at startup

03/30/2008, 09:42 AM	#5
cczarnik Registered Member Join Date: Dec 2004 Location: Franklin, TN Posts: 433	It's the auto shut off valve.

03/30/2008, 09:43 AM	#6
Sophie-G Registered Member Join Date: Jan 2008 Location: London, ON, Canada Posts: 115	that's what I was thinking... ???

03/30/2008, 11:06 AM	#9
cczarnik Registered Member Join Date: Dec 2004 Location: Franklin, TN Posts: 433	Sorry about my brief msg before, had to leave the computer.. Mine does this, it's the auto shutoff that sits between the water supply and controls the source. (the valve that has 4 pipes going into it). Sometimes it will be a high pitch wine, other times a low vibration that rattles through the whole wall. I've never tried to solve, just got used to it. Maybe it is air? For reference my system is a water general / filter direct unit.