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There is little difference between a powerhead and a pump. The power heads that say they need to be partially submerged should be to cool them; by not doing this it shortens their life span. They need the cooling of the water (and this is normally one of the small diferences.) The hose that comes off a powerhead is to inject air not let it escape. Most power heads come with a plug to block off the fitting for the hose but don't do a good job, if you use a power head for your rig use a little silicone to fill that fitting. I've found that the retailers that say you don't need to submerge these at all are looking for return business as I have burnt one by letting the water get to low.tcl said:
So, two things.
The maxijets come with a bunch of bits that help you hook them up to your aquarium filter and inject air, etc. However, these bits are all separate from the pump and don't need to be used.
Differnt models of the pumps can be purchased with or without these extra bits; those with them are called "powerheads" and those w/o "pumps." FOr reasons i don' t unserstand, certain ratings are only available for one or the other.
Anyway, my mj 900 ("powerhead") manual states that the pump needs to be partially submersed but i think they are just trying to say that when it's in an aquarium and thus not attached to hoses, the end sucking water does (gee) need to be in the water.
I have seen aquarium retailers state that they do not need to be submerged.
Roger24 said:I sent an email to a Zoo webshop and got the exact dimensions of the Maxijet pumps:
Width: 50mm - Lenght: 83mm - Height: 68mm
I'm wondering if I should go inline instead, since it won't be easy to find a resevoir that will fit, and the Maxijet fits perfectly between my soundcard and the case lid. I'm just wondering how air escapes out of the top of that bleeding hose? Does it need to? It's sealed at the top, right? Will running it inline decrease the reliability and/or life expectancy of the pump?
mustangman said:
There is little difference between a powerhead and a pump. The power heads that say they need to be partially submerged should be to cool them; by not doing this it shortens their life span. They need the cooling of the water (and this is normally one of the small diferences.) The hose that comes off a powerhead is to inject air not let it escape. Most power heads come with a plug to block off the fitting for the hose but don't do a good job, if you use a power head for your rig use a little silicone to fill that fitting. I've found that the retailers that say you don't need to submerge these at all are looking for return business as I have burnt one by letting the water get to low.
I know some of you have seen some of my posts about pumps before and I don't mean to sound like I know everything about these but I have had over 15yrs of experience with them between salt water aquariums and watercooling my rig.
mx-6* said:Is it that small?
I've heard that bilge pumps will quit working after a while because they aren't made for 24/7 duty.
Avalanche said:overclockershideout has a real nice one that pushes 500