Reverse Osmosis Low or No Pressure - How To Fix - Home Master Under The Sink System Water

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If your Reverse Osmosis system is losing pressure, it might be a symptom of a few different problems. There could be a simple reason why pressure isn't making it to the faucet. I could also be due to the tank needing re-pressurized. In this video we show how to take the steps to diagnose and resolve the issue.

Get some new filters:

If you need to re-pressurize, here is a pump that will help:

I used an air compressor as it moves the water out much faster and helps build pressure easier without so much hand pumping. Here is a little one that will do the job:

If you can't re-pressurize the tank, you can purchase a new one:
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[memorizeproverbs]

As a plumber, I couldn’t help but notice your dishwasher drain hose has no air gap or “high loop” and looks funky inside. That’s due to gunk from your disposal spilling into it, (which in many cases will cause your dishes to smell nasty even after the dishwasher is done) solution: ziptie the drain hose to have a high loop in it, higher than the connection to the disposal, to prevent back flow.

[rhaeyn]

Thank you so much for this video!! I called Culligan to find out why the flow was so low and they were not only unwilling to help they were extremely rude. I had resolved myself to the fact that I'd have to have them come out and service my system. The last time I did this it cost me over $500. With this info I can resolve it myself and save a bundle of cash!! What a blessing!!

[dixonlegrande]

Thank you so much! Couldn’t find answers from anyone that supports the system. Came to YouTube and found you! Thank you so much!!

[NAM-qvou]

Good video. It helped me as the first time I didn’t fully drain the tank as I didn’t know how and didn’t want to over pressure the bladder. Let’s see if it works this time for a longer period.
It would’ve been nice to show the pressure after the tank was emptied and indicate that lifting. Also that you have to pressure the bladder to 5-7 psi after the system is drained.

[michaelsawa]

Thank you!!! Service guy recommended a new tank and I knew it could be fixed instead!! Appreciate it!!!

[db]

Hi Brick Building Kids. To have the faucet in the open position, no need to use a sponge to hold it down. Flick the handle upwards.

[DustinSmith-zu]

This helped my fix my system that I have had for 4 years. It never worked anywhere close to this good!

[KLButlerBaldinger]

We had the same issue with low/no flow after following the instructions for replacing the filters on our Aquasana 5300. My husband added a hose washer to the bottom of the green canister and voila! Water at a great rate! Thanks help line!

[GranTigerGaming]

Great video, I saw in other videos they completely disconnected the tank, but yeah makes sense you can just shut off the water, keep the faucet open, and pump the water out, might go a little faster completely disconnected since it doesnt have to go back through the filters and tubes, but this is more convenient if its safe.

[franciscom.torres]

Thank you for the detailed video and explanation! I was able to get my reverse osmosis system working properly again without having to pay the $100+ service fee charged by my water softer company. I used a bicycle pump to re-pressurize it to a PSI of less than 10PSI. I didn't have a pressure meter that could measure smaller amounts, so I used the gage on the bicycle pump. My tank had a Max PSI of 100, but from advice on a similar tutorial video, it said to keep it at between 5-7PSI. Thank you!

[Mrajabhai]

Thanks. This was helpful. Earlier I did not use pressure (fearful of bursting the bladder) to empty the tank completely and the problem remained unsolved. Problem was solved after emptying the tank entirely.

[JPXU]

Yes, this is super helpful, and my issue is resolved. BTW, here is how I decided the amount of air I pumped into the tank. Turn off the water source valve, and begin to drain the water in the tank into a container. When it starts dripping, pump some air into the tank. Repeat this until you have the right amount of water in your container, and you stop pumping air. In my case, I want to drain one gallon of water from the tank each time.

[hslot]

Note when you repressure your tank the max pressure should not exceed 7, 5 PSI . It is not the more air you put in the more pressure you get it the diameter of the faucet is determining the max flow rate /amount that goes thru. The usual water pressure here in Holland is 3, 5 bar wich is 39.4 PSI when you pump your airtank higher then that like the max working pressure written on the tank it wont fill upp because the water pressure from the city is lower than your tank pressure . It will prevent the tank from filling upp with osmosis water. This is said for passive sytems with no booster pump . If you have a booster pump you need to look at the pressure it delivers and stay below that with your tank. And again increasing the pressure in the tank wont change the amount of water that comes out of your faucet.

[Wildzephr]

Super helpful my guy! My dad and I were trying to figure it out for the last few weeks until I decided to look it up instead of fumbling around troubleshooting. Hope you’re doing well!

[kidcompany]

Awsome. Thanks! Mine stopped and I got new filters but could not figure out why the water would not flow. I did not know you have to keep the tank pressurized. EZ fix.

[wendyland]

Just finished draining. Everything going exactly to your directions. Hopefully it is back to 100% after fill up🤞🤞🤞 Thank you!

[Seth.Lippman]

This was super helpful, thanks! Totally worked and fixed my low capacity flow issue!

[katiehunter]

A bike pump works too! And it says the psi on the tank but my bike pump didn’t say the measurements so I just pumped it for a bit and it fixed it for now, thanks!!

[AlTheEngineer]

Hey, I am curious why did the tank lose pressure to begin with? How often are we supposed to re-pressurize the tank? Is it better to get a pump based system to avoid this problem? Thanks for the video!

[tonytran]

My fix was to relieve the tank. The psi was up to 30. Reduced it down to 8-10 psi and now water flows great