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danner mag pump questions

R

rogue_jedi

Supreme [H]ardness
Joined
Sep 6, 2002
Messages
4,821
i am looking at getting a danner mag pump for my watercooling loop soon and i have a few questions (of course)

1) what size tubing do the pumps use (inlet/outlet)
2) is the mag 7 worth the price increase over the mag 3
3) are there any differences other than flow between the mag 3 and the mag 7
4) what is the best place to buy one (i'm in maryland if it makes a difference)

thanks.
 
could someone please help me with this... i need it for my science fair project.
 
get the 3.

they recieve fittings that take whatever you can stick on it. mine uses 1/2" ID.

the difference between the 3 and 7 is much more than that between the 3 and 5. anything above a 3 will be dumping a LOT of heat into your loop. you lose cooling efficiency. i havent known anyone who actually needs 700GPH of flow. the 3 is great for 90% of watercooling. unless you are running like dual TEC's or someting (for which i would recommend an iwaki pump, since the system is gonna cost money anyway) you're best off with the 3.

i got mine from marinedepot.
 
first, thanks for replying. does the mag 3 push enough to be used with a jet impingement block (one of 3 designs i'm testing)

also, how much was yours? petsmart wants $45 for the 3 and $65 for the 7.

thanks
 
Originally posted by rogue_jedi
first, thanks for replying. does the mag 3 push enough to be used with a jet impingement block (one of 3 designs i'm testing)

also, how much was yours? petsmart wants $45 for the 3 and $65 for the 7.

thanks
Click to expand...

Yes, the mag 3 is awesome for jet impingement blocks. And like hardwired said above, the 7 will just be dumping excessive heat into the system.

I think I paid 39 or so from marinedepot.com that was a while ago though, so I am not sure.
 
it doesn't look like marinedepot carries the mag3 anymore, so i guess it looks like petsmart for me.
 
To be honest, I'd stay the fock away from Danner. All I know is the box mine came in said 1/2 ID In/Out.

I got threaded fitting for out and 3/4 ID in. Plus, these fuckers leak out the top like a BITCH. I've had to RV Sealant mine a few times just tot slow it down.
 
funny... I never had to do anything to mine. No leaks (the oring worked fine) and everything was perfect. Couldn't be happier.
 
Maybe I got a lemon then. This thing is loud, leaks like a bitch, and the barbs weren't the right size.
 
hmm... i don't want a leaky pump, so has anyone else had this problem? (just wanna know if leaks are a fluke or the norm for users here)

also, how long have you been using your pump/what usage does it get (continuous/sporadic)

thanks again.
 
Originally posted by rogue_jedi
it doesn't look like marinedepot carries the mag3 anymore, so i guess it looks like petsmart for me.
Click to expand...

Marinedepot.com still has them, but they are listed under supreme (the actual http addy still calls them danner). They are still 39 bucks. Here is a direct link for you.
 
Mag3 + Cascade = teh win

Had mine going for several months with no modifications to the pump itself just whatever fittings i needed for the hoses no leaks as of yet.
 
thank you DocFaustus. should save me a few dollars (depending on shipping costs)

thanks for all the help, i'll post pics of the wc system/blocks when i finish them up (it might be awhile though)
 
I too was referred to the Mag series pumps but i decided on the 5's as opposed to the 3's since i wanna make sure i'm pushin enough water up to the shower heads of the dual bong rig i'll be running...shouldn't have a problem...but for a regular rig, a 3 would be perfect...
 
You pay shipping and you can HAVE my Mag 7, damn thing EXPLODED in my PC. I epoxied all the pieces back together and it works alright for emptying a wading pool, but I would never trust it again inside a PC :) Failed in my twice, the first time it was repairable, but the second time the whole impeller housing fell to pieces.

It created a TON of heat too, I'd personally stay away from them, but it's up to you.
 
Mag 3s are very reliable if you take the correct precautions to keep them from leaking.

All that is required is some petrolium jelly generously applied around the O-ring to keep it watertight and good brass fittings and some teflon tape. Essentially, you need to put the teflon tape on the barbs (the barbs and the teflon tape are available at any local hardware store, the petrolium jelly may be at wal-mart or eckerd or somewhere else that I am not aware of) and screw the intake one on loose and the output on tight. The intake is prone to cracking if you tighten it too much, so dont over-do it. The output is much safter to really wrench on.

I have had my mag 3 running for 6 months straight, it is quiet as ever and really performs with my whitewater. I recommend.
 
I've had a Mag 7 running since beginning of 2000, 24/7 from one rig to the next, only time it's off is for an upgrade.

I remember when i first got it and tested it outside in a bucket with a 1/2 line on it. You can wash your car with this pump.
 
The mag seven worked perfectly until it failed out of the blue. And the pump didn't really mechanically fail, its just the housing is so incredibly cheaply made that it fell apart. It also produces a LOT of heat. The water in my loop was 85f with the PC off at 70f ambient.... Too hot of a starting point if you ask me.
 
so are you all saying 3, 5, or 7? i had almost decided (was gonna buy it soon) but than i saw the people with 7's. of course, the 7 falling apart does make me want to go with the 3 or 5. anyone have the 5?

btw, i'm probably going to be doing fishtank cooling with a rad (maybe, but not right away) if it matters.
 
Originally posted by mattyfatty182
To be honest, I'd stay the fock away from Danner. All I know is the box mine came in said 1/2 ID In/Out.

I got threaded fitting for out and 3/4 ID in. Plus, these fuckers leak out the top like a BITCH. I've had to RV Sealant mine a few times just tot slow it down.

...This thing is loud, leaks like a bitch...
Click to expand...

that basically sums up the experience I had with the mag 5.
It was loud and then after about two weeks it started leaking out of the impeller housing. so, I added a bead of silicone around it.
problem solved for another week...until the impeller housing cracked like a cheap POS.
I used some mean and nasty epoxy and sealed that up.

shortly thereafter, I concluded the damn thing was a leak hazard so I submerged it in the res. about a week later, I heard a loud "pop!" come from the res so I popped the top off the res to find a nice and dead mag 5. I then took it to the range and shot the bastage several times with a DR-200 loaded with 5.56mm m855 ss109 green tips to make sure it didn't try to find its way out of my house and inflict more damage to others.

danner?

never again.
 
those are the kind of stories i keep hearing about the Mag pumps...has anyone ever had any trouble with any other brand pumps? i'm sure there's someone out there...ALL Mag's can't be bad...just like ALL other's can't be good...it's a mixed bag...just trying to see how often it would happen on some of the most used...
 
I've had both an Eheim 1250 and the Danner Mag3. Both wonderful pumps, though the danner gets a little warmer, it is a bit quieter and has higher head.
 
Originally posted by fubar569
those are the kind of stories i keep hearing about the Mag pumps...has anyone ever had any trouble with any other brand pumps? i'm sure there's someone out there...ALL Mag's can't be bad...just like ALL other's can't be good...it's a mixed bag...just trying to see how often it would happen on some of the most used...
Click to expand...

I dont know if anyone will recall this or not, but a few years ago, danners were the pumps that everyone was going to -- it was almost like a damn water pump fad if there could be such a thing.

then an @$$load of people started having all kinds of h311 with them -- mainly impeller housing leaks as the danners were using plastic screws that would strip out and allow the housing to get loose enough to leak. of course, about a hundred different ways to resolve the impeller housing problem started popping up. Then people were having cracked impeller housings (this matched up exactly with my experience with them). Not long after than, the damn clicking from them started driving people insane and that led to the impeller shaft/super glue mod - then that led to startup problems on a decent percentage of the modded pumps. I never did the super glue mod on mine but I remember the damn click-tik-click-click noise that came from my mag 5 and I saw some that were modded only to lead to startup probs (i.e. on startup, the pump would start to hum and it would sound like it was working right but if you checked, it wasn't moving any fricken water whatsoever).

to make a long story short, some of them seemed to be great pumps but an unusually high number started being worthless POS pumps. they obviously were having some very shitty quality control probs. Eventually, they were almost entirely abandoned in favor of other pumps that seemed to be much happier pushing water thru tubes in boxes full of electronics (i.e. eheim and others).

when I first noticed their return to popularity in watercooling, I wondered how long it would be before there were threads on fixing the impeller housing leaks, the damn clicking and what other pumps could be used to replace the bastages. I have already seen a few such threads - I suspect there will be quite a few more.

maybe everything does move in cycles... ;)
 
i just read your sig...what are you running at? just thought i'd ask...obviously you know your stuff and i'm interested in knowing how much luck you had with your barton...
 
The new mag 3s have stainless screws, are built like tanks, and I have never had a break on anything on it. I would trust my life with this pump. Basically, I think most people had problems with the 5 and 7 because they are almost too large for the system and are doing too much work. The mag 3 is perfectly suited to nearly every kind of setup.

I remember I was one of the first people to get a mag 3 in the "fad". I asked everyone about it because I saw it on an extremely old OC.com article and it performed very well. I absolutely loved it compared to my 2 via aquas, both of which died within 2 months of initial installation. It must of been a cavitation problem or something. All I know is that now I have no problems with the mag. It is silent, powerful, rugged, just about everything I could have asked for.

If anything does break, replacement parts can be found cheaply at reefgeek.com

I had to buy a new impellor housing because I did something stupid and tried to get a fitting on there super tight. I had a massive brass fitting on the intake side with too much teflon tape on it and I was probably putting about 30 ft.lbs on the fitting. I got all the way to the end of the fitting and it just popped and there was a little crack all down the side. Like I said, I was doing something unnecessary and stupid for this to happen, but it happened nonetheless. The new part was very cheap and arrived fast, so I give the thumbs up to reefgeek. If you are concerned, I would just get an extra impellor housing and buy the pump there. They are pretty cheap.
 
yeah -- there are two sides to every coin. like I said earlier, some danners were apparently very bad@$$...more power to those who happened to get one of the good ones and never had to walk in and find a 1/2" of coolant casually lounging in the bottom of their case.

There is little doubt that every manufacturer has full-on blown it at one point or another and danner may have resolved the problem(s). Still, that is no reason for those that had a royal PITA experience with them to turn around and give a glowing endorsement when they slap on new stainless screws (which happened to be the same fix that many tried in round one of the epic battle with the danner impeller housing only to discover other new and improved problems in round 2). I checked their website and I don't really see any substantial design changes other than the SS screws.

If they have indeed fixed the problems and MagDrives are now near bulletproof then we have another good option for watercooling systems.

my conclusion: I spent a fricken @$$load on the rest of my system. In light of that, kicking out the extra $$ for a pump that is the quality of a Rainbow or an Iwaki (i.e. one that I know is bulletproof, impervious to kryptonite and the dark side of the force) is not very expensive insurance.
 
The problem with the Mag Drive pumps has always been the impeller covers. The inlet is a 1/2 in female pipe thread. For anyone who has owned one, you can see that the entire piece looks like two pieces bonded together to form one. This creates a weak joint for anything that is exerting a forward/outward pressure such as a male pipe thread fitting would on the female/inlet. This pressure causes the female inlet on the impeller cover to "split" and crack. Some will say "don't tighten it so much". Been done tried that. Even nylon barbs with barely moderate torque applied splits them. You got to tighten them to some degree so they don't leak. In my opinion, mag drives are not good for watercooling pcs. You shouldn't have to goop and epoxy and seal a pump to keep it from blowing up. Would you risk that inside your pc? ;)

P.S. If impellers and impeller covers for Mag Drive pumps are readily available at most aquarium stores, doesn't that tell you that people must need them? I know I wouldn't replace it unless it was broke (blown up)!
 
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