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RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 12:18 am
by justonix
My RODI unit started leaking right after I changed the filters. It's a 4-stage system, and the leak is coming from the housing of the second stage. I tightened everything, but it's still dripping. Anyone else run into this?
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 1:07 am
by RazorX
Yep, had the same issue last month. Did you replace the O-rings when you swapped the filters? Those things can get worn out and cause leaks if they're not sealing right. Also, check if the housing is cracked, sometimes overtightening can mess with it.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 2:47 am
by onyxia
I'd recommend inspecting the housing for any cracks or scratches. Even a small imperfection can cause a leak. If it's not the housing, maybe the filter isn't seated properly. Try reseating it and see if that helps.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 4:46 am
by Murder
RazorX wrote: ↑Thu Aug 28, 2025 1:07 am
Yep, had the same issue last month. Did you replace the O-rings when you swapped the filters? Those things can get worn out and cause leaks if they're not sealing right. Also, check if the housing is cracked, sometimes overtightening can mess with it.
Exactly this. O-rings are often the culprit. If they're dry or damaged, they won't seal. A little silicone grease can help if they're just dry.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 5:20 am
by Dale
Mine leaked once because the filter wasn't pushed all the way in. Felt like it was seated, but nope. Double-check that, and maybe give the O-rings a light coat of grease like Murder said.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 6:29 am
by justonix
Thanks for the tips. I'll check the O-rings and try reseating the filter. Didn't think about the grease, that's a good idea.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 7:02 am
by RazorX
No prob. Let us know how it goes. If it's still leaking after all that, might be time to replace the housing. They're pretty cheap online.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 7:50 am
by onyxia
Also, make sure you're using the right size O-rings. Sometimes the ones that come with replacement filters aren't the best fit.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 9:46 am
by Murder
onyxia wrote: ↑Thu Aug 28, 2025 7:50 am
Also, make sure you're using the right size O-rings. Sometimes the ones that come with replacement filters aren't the best fit.
Good point. I've had to buy separate O-rings before because the included ones were sketchy.
Re: RODI unit leaking after filter change
Posted: Thu Aug 28, 2025 10:22 am
by Dale
Yeah, third-party O-rings can be hit or miss. Stick with the brand's replacements if you can.