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Re: [APD] Eheim Leaks



Another problem is that the rate at which these small holes clog is probably much greater than the rate of o-ring failure. Of course, regular maintenance with a brush can avoid clogging. Generally, if the o-ring doesn't leak after you assemble the canister and turn it on, the it won't leak before it's next service; the leaks usually occur right after reassembly. Unlike o-rings in faucets, which are subject to repeated movement while in service, o-rings in a canister are not subject to any movement, or nor hot gases as in rocket engine joints, or anything else that will wear them down -- well possibly Vaseline but you'd have to go many years between filter services ;-)
 
I believe the more likely kind of tank draining leak involving tubing involves poor tube-to-filter joints or joints that come apart. I've had this happen a number of times with back filters, back in the days when they were driven by airstones and the connectors were always smooth (say, 30 or 40 or so years ago). I don't recall it ever happening with any of my canister filters. In fact, I've had tanks develop breaks or seeps more often, which is only a few times. Of course, since those olden days, I clamp any tube joints involving smooth connectors, preferring to spend the effort of the care with which parts are assemble rather than surgery on the parts. 

Siphon break holes are another way to go if you can keep the water level above the hole during pump operation. But you will still get some water on the floor until the water level drops down below the hole and the tubes empty.

Have joints, have fun,
sh


 
----- Original Message ----
From: Mike Szilard <szilard at sbcglobal_net>
To: aquatic plants digest <aquatic-plants at actwin_com>
Sent: Wednesday, April 18, 2007 8:25:19 PM
Subject: Re: [APD] Eheim Leaks


I see one problem with this...  I do 50% water changes and leave the 
filter running when I do.  Drilling a hole will not work in my case (or 
similar).

--Mike

On 4/18/2007 12:05 PM Liz Wilhite said the following:
> On 4/18/07, Dennis Dietz <dennisdietz at verizon_net> wrote:
>   
>> Harry Martin wrote:
>>     
>>> I never want to come home to an empty tank and flooded floor.
>>>       
>> On way to insure against that is to drill a small hole in the intake,
>> just below the maximum low water level in your aquarium.
>>
>>     
>
> As Scott pointed out some time back, you need a similar hole in the return
> system unless your output is at the top of the tank.  In a power outage the
> system can drain from the return as well as the intake.
>
>   

-- 
Mike Szilard


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