404 fluval leaking

[avecorealty]

i got it used with 2 other canisters, all for 30 bucks filled with tons of media.
I changed the ring seal but it is still leaking. Maybe the reason is that it was sitting dry for 2-3 months.
i have no idea what to do. I will let it sit in the garage filled with water and hopefully the seal will start working

 

[Euge]

i've heard that this is a common problem with the fluval 404. Maybe its the clamps?

 

[joeytoe]

Id check the clamps I have a 104 an the clips can be a lil off if there not perfect.

 

[hillbilly]

Yeah, if the clamps are not holding it firmly, it's gonna leak.

 

[turtleman85]

I had my 304 to leak on me a couple of weeks ago. I didn't have the lid sealed properly in the back, but the clamps snapped into place ok. I didn't think it could happen that easily.

 

[bilandshark]

IN reassemly if you over fill the canister it can cause leaking when it primes. The baskets move and shift, try not adding as much w ater in the canister B4 you put it back together.