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Flood Warning
December 28, 2010
6:45 pm
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Steve Waring
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October 16, 2010
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There are loads of stories about this on the internet, but I never saw any of them until after the event, so I thought I would repeat the warning here. It applies to any of the large square external Ehiem filters. Mine is the pro3 2180 which contains a heater. They look like this:
eheim-pro2.jpg

Your filter runs perfectly, then eighteen months later there is a power failure in the middle of the night. The next morning as you walk downstairs, you think the spray bar sounds noisy. Walking into the living room you find 100ℓ of water dumped on the carpet.

This is where a wet/dry vacuum cleaner comes in useful. Time to crank up the RO machine too. The next thing to do is look on the bright side, it could have been all 250ℓ and a lot of dead fish if the power had not come back on in time.

The problem is the rubber O ring (well sort of square ring) seal at the top of the filter. When the power goes off it does not hold the water back and it syphons out.

The answer is to rub Vaseline over the O ring when installing it. It comes ready installed so best to take it out and Vaseline it and replace it on a new filter. Replace this part every few times you take the lid off the filter.

Always after any filter maintenance, let the filter run for half an hour, then turn the power off and check for leaks.

As I found out afterwards, these filters are notorious for this problem, but I was not aware of it, so if this post saves one flood, it's worth it.

December 28, 2010
7:44 pm
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Bully
South Wales
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I'm pretty sure Eheim cover this in the manual, I think they require you to grease the gasket using their branded spray.

I know for the Eheim Ecco Pro that I have, that they state to grease the sealing ring with Vaseline (they mention it by brand, not generic petroleum jelly).

December 29, 2010
11:54 am
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Matt
Málaga, Spain
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June 13, 2011
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Faintly silly that you need Vaseline for the filter to function correctly, no? /blink.gif" style="vertical-align:middle" emoid=":blink:" border="0" alt="blink.gif" />

Cake or death?
December 29, 2010
8:18 pm
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Bully
South Wales
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Indeed. If you don't grease the Ecco Pro you will most likely snap the handle retaining clips - as I found out before deciding to thoroughly read the instruction manual /tongue.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tongue.gif" />

July 19, 2011
11:19 am
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Steve Waring
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October 16, 2010
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QUOTE (Bully @ Dec 29 2010, 09:01 PM) < {POST_SNAPBACK}>
Indeed. If you don't grease the Ecco Pro you will most likely snap the handle retaining clips - as I found out before deciding to thoroughly read the instruction manual /tongue.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tongue.gif" />


I've just bought another of these filters new. The manual made no mention of greasing the seal. So people are still being sold filters that will flood their rooms if there is a power failure.

August 15, 2011
6:11 pm
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poshsouthernbird
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February 11, 2011
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Sorry to hear about your problems, I've got an Eheim Pro 2224. The instruction manual does state to grease the o-rings with vaseline though. Although, I can't help but wonder if vaseline has been misinterpreted from German somehow (I've only got the English version of the manual as filter was second hand and I got the manual from the web) as the filters actually come with a little tube of silicone grease which the picture instructions tell you to use on the o-rings. Silicone grease and vaseline are two very different things. IME vaseline should not be used on seals and o-rings as petroleum jelly can degrade rubber. It's possible that modern seals do not include any rubber but you have to wonder why the Eheim kit comes with silicone grease. Personally I wouldn't use vaseline at all. My other hobby is mountain biking, my OH does all the maintenance on our bikes and is a mod on an mtb forum - he has very very strong words indeed to say to people who use vaseline on the seals on their bikes /wink.gif" style="vertical-align:middle" emoid=";)" border="0" alt="wink.gif" /> AFAIK, all the grease you buy for mtb seals is silicone based.

I give the seals on the Eheim a little rub with the silicone stuff every time I clean it. You only need a tiny little bit mind, no need to slather it on /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" /> HTH.

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