Eheim jager really fully submersible?

[AlanM]

I have two 250W Eheim jager heaters.  They're glass with a control part on top made of plastic, I guess.  The box said fully submersible, but there's a mark on the control part that says "water line" which I assume means that the temp sensor is below that mark.  They're really long, longer than my sump is tall if I put them upright.  In the sump it would be most convenient to just lay them flat, but then they'd be totally underwater.  Right now I have them in diagonally so that the water line mark is basically correct, but the dial that controls temp is out of the water.  The temp sensor is just a failsafe because they're controlled by my Apex. 

 

Do most people just fully submerge them?

[Coral Hind]

I fully submerge mine and I haven't had any issue. Been doing it that way for many years, even with the new style ones.

[Origami]

I submerge mind as well.

 

Sent from my phone

 

 

[AlanM]

OK.  Thanks.  Will do that.

[smallreef]

I have always submerged mine...

[ronl]

I have run them submerged as well. I believe that line is the minimum water level so that the glass part is not exposed to air when hot.

[monkiboy]

I have run them submerged as well. I believe that line is the minimum water level so that the glass part is not exposed to air when hot.

yes, minimum water line not maximum is the way i always understood that. and have always submerged mine as well.

[matt]

The only catch in submerging mine is that the dial for temp control has gotten crusty and hard the change

[s2nhle]

I submerged mine as well. no problem here.

[AlanM]

OK.  dual 250's was kind of overkill anyway, so now I just have the one and fully submerged it in the sump/fuge.  I'll set an email alert at a temp a degree or two lower than setpoint if this one can't handle the winter and add the other online. 

[YHSublime]

I have run them submerged as well. I believe that line is the minimum water level so that the glass part is not exposed to air when hot.

 

This.