ehiem pro II problem

13-10-2010, 01:22 PM

hi all, got a problem with the pro II, the water keep overflowing each time i open the valve. the water flow out from the side of the cannister rather than into the tank. can anyone help ?

sheng · 13-10-2010, 01:26 PM

may be u need to change the O-ring (gasket)

keygan · 13-10-2010, 02:07 PM

bro, is the pump head cranking with noise? is the impeller working(spinning)? better put the pump head and try on a basin of water to check/test first, see if this remedy works

13-10-2010, 04:45 PM

if leaking at the gap where the body and head meets, then is o ring

14-10-2010, 02:34 AM

care to elaborate how does the o ring work ? bcos i first time using ehiem

14-10-2010, 11:10 AM

An O-ring, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a disc-shaped cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.

Basically, it seals up the gap between the body and head, creating a waterproof seal.

More information on o-rings: http://en.wikipedia.org/wiki/O-ring

Most o-rings are made of natural/synthetic rubber, silicone or composites. Most do lose their elasticity over time. Hence, it is rather common that o-ring loses its sealing capability over time and you have to replace the o-rings.

You can find the o-ring being attached to the side of the head; just imagine putting a rubber band on the head, just that the colour of the band is black.

It looks like something on the first picture in the link: http://www.shop.trilbytropicals.com/...?categoryId=24

The Eheim filter manual suggests you to lubricate the o-rings. New replacement o-rings are pre-lubricated.

troyz · 04-12-2010, 05:17 PM

hi oikh, if your pro2 filter is leaking by the side ONLY...
you can go to C328 n buy just the o-ring n replace it..

13-10-2010, 01:22 PM	#1
oikh Guest Posts: n/a	ehiem pro II problem hi all, got a problem with the pro II, the water keep overflowing each time i open the valve. the water flow out from the side of the cannister rather than into the tank. can anyone help ?

13-10-2010, 01:26 PM	#2
sheng Dragon Join Date: Dec 2005 Posts: 2,198	may be u need to change the O-ring (gasket) Last edited by sheng; 13-10-2010 at 01:29 PM.

13-10-2010, 02:07 PM	#3
keygan Dragon Join Date: Feb 2002 Posts: 872	check your impeller bro, is the pump head cranking with noise? is the impeller working(spinning)? better put the pump head and try on a basin of water to check/test first, see if this remedy works

13-10-2010, 04:45 PM	#4
thegongone Guest Posts: n/a	if leaking at the gap where the body and head meets, then is o ring

14-10-2010, 02:34 AM	#5
oikh Guest Posts: n/a	care to elaborate how does the o ring work ? bcos i first time using ehiem

14-10-2010, 11:10 AM	#6
thegongone Guest Posts: n/a	An O-ring, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a disc-shaped cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. Basically, it seals up the gap between the body and head, creating a waterproof seal. More information on o-rings: http://en.wikipedia.org/wiki/O-ring Most o-rings are made of natural/synthetic rubber, silicone or composites. Most do lose their elasticity over time. Hence, it is rather common that o-ring loses its sealing capability over time and you have to replace the o-rings. You can find the o-ring being attached to the side of the head; just imagine putting a rubber band on the head, just that the colour of the band is black. It looks like something on the first picture in the link: http://www.shop.trilbytropicals.com/...?categoryId=24 The Eheim filter manual suggests you to lubricate the o-rings. New replacement o-rings are pre-lubricated.

04-12-2010, 05:17 PM	#7
troyz Arofanatic Join Date: Feb 2006 Posts: 183	hi oikh, if your pro2 filter is leaking by the side ONLY... you can go to C328 n buy just the o-ring n replace it..

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