This Grundfos pump is cheaper than an Eheim 1250, should I...?

Mumrik · 08-16-2001, 10:45 AM

I saw this Grundfos pump on sale for 71USD, that's cheaper than an Eheim 1250 here in Denmark.

It's a Grundfos circulation pump called the UPS 25-40, I saw this thread and this might be the european (220-230 volt) version of that one...

It's made of iron and it does 3m3/hour... that's 3000 liter per hour or 792.5 GPH!!!
It has three speeds though so I should be able to lower that...
it can lift water 4 meters, the ad also says something about 1-4 meters column of water, I don't know what that means.
The pump has 3/4" or 1" connections..

This 1350kb. PDF is very interesting and informative but it's in Danish so I guess only Scandinavians will understand it...

I ripped a picture from the Danish PDF on Grundfos site (couldn't find it on the American site), and translated some of the Danish to English (some wasn't translated, see the notes below the picture), it shows the pumps performance, dimensions, connections and so on.

* Indbygningslængde, perhaps it has something to do with internal fittings, I'm actually not sure...

** Koldtvandsudførsel, is the removal, or taking out, of cold water... hmm. dunno...

Oh, and the words unioner and ventiler (see the "connection"-part) means unions (?) and valves...

Is there any reason I shouldn't buy this pump?

BladeRunner · 08-16-2001, 12:24 PM

I've a 15/60 here that I will be using in my Stealth Cooling but they are probably not Ideal for most water cooling projects. Firstly the are designed for central heating systems and are heavy cast units not easy to mount. They also require careful priming before running or you will kill the bearings and they have to be mounted in a certain plane and bleed of air in the shaft area. A coolant mix is essential if you want the bearings to last. The other undesirable factor is they get hotter than the Eheim would in use, (which isn't a major issues in my cooling system), but would be to those with air cooled rads.

Here's a pic of Gasman's system using one and he just recently asked if our 1250 Eheims, (myself and others are using one at the moment), run cooler.

the thread is HERE scroll down to Gasman's reply

It would work but I think in the long run you'd be better off with the Eheim. After all Eheims are designed for Aquarium filtration which is similar to your PC water-cooling, Grundfos UPS pumps are for domestic/light industral hot water circulation.

Mumrik · 08-16-2001, 02:20 PM

Thanks for the reply, even though it was mostly bad news

Quote:

Grundfos UPS pumps are for domestic/light industral hot water circulation

hmm, according to the PDF they are made for circulation of hot or cold water also for cooling purposes...
It also says that normal water is fine as the pump media (the liquid flowing through the pump).

I have seen your work and your word carries a lot of weight, if noone else has anything to say about this, I'll probably end up paying more more money for an Eheim 1250...

Edit: Are you looking to get rid of your Eheim 1250?

BladeRunner · 08-16-2001, 03:57 PM

Yes I agree it will work with cold plain water, but it's main use and what it is really designed for is Central heating systems. Regardless of what they say it will last longer if it has some extra lubricant in the water to "help" the bearings, just like the water-pump on a car engine will last longer with an antifreeze coolant than just plain water in the cars cooling system. Central heating systems use fernox but antifreeze is ok too. I do believe you will be happier with the Eheim, it's light, quite easy to mount, doesn't get hot, and can be easily submerged but don't just take my word for it. Being able to polish a few lumps of metal and dig a large hole doesn't qualify me as an oracle on everything water-cooled

What is your system layout? do you require that huge flow rate? as that may make some differences to the answer?. I stupidly managed to crack the very thin plastic case on my Eheim by using a tapered fitting. It is fixed with araldite and doesn't leak but as such I'm sure you wouldn't want it. I also want to keep it for "emergencies" and a possible mobile box later. Eheims are not excessively priced in the UK my 1250 was about £46 I think, what's the Eheim 1250 price where you are?

Mumrik · 08-16-2001, 07:36 PM

The setup will not be all that demanding, it'll probably (not bought yet) be a heather core from Dtek and one of Fixittt's Copper Spiral Blocks (He got Dtek to sell them for him)... I am aware that the Grundfos pump would be insane overkill, that's why I wanted to run it at it's lowest speed (at which it only draws 30W).

The reason I was concidering it is simply the fact that it was cheaper than my first choice, the Eheim 1250 which I (since I haven't been able to locate it here in Denmark) would have to pay about $5 more plus shipping for (ordering from Sweden)...

Thanks for helping by the way

EDIT: Kinda forgot to mention that it probably will be cooling a palomino...

mkosem · 08-16-2001, 11:00 PM

that pic is not a water pump!!

--MAtt

BladeRunner · 08-17-2001, 03:02 AM

What pic is not a water-pump?

Mumrik · 08-17-2001, 12:50 PM

Quote:

that pic is not a water pump!!

Huh?

mkosem · 08-17-2001, 04:49 PM

there was a different pic there before, some weird pornographic pic with a woman with a pineapple between her legs. Heh, IDK, prolly just a fluke.

--MAtt

08-16-2001, 10:45 AM	#1
Mumrik Cooling Neophyte Join Date: Jul 2001 Location: Denmark Posts: 39	This Grundfos pump is cheaper than an Eheim 1250, should I...? I saw this Grundfos pump on sale for 71USD, that's cheaper than an Eheim 1250 here in Denmark. It's a Grundfos circulation pump called the UPS 25-40, I saw this thread and this might be the european (220-230 volt) version of that one... It's made of iron and it does 3m3/hour... that's 3000 liter per hour or 792.5 GPH!!! It has three speeds though so I should be able to lower that... it can lift water 4 meters, the ad also says something about 1-4 meters column of water, I don't know what that means. The pump has 3/4" or 1" connections.. This 1350kb. PDF is very interesting and informative but it's in Danish so I guess only Scandinavians will understand it... I ripped a picture from the Danish PDF on Grundfos site (couldn't find it on the American site), and translated some of the Danish to English (some wasn't translated, see the notes below the picture), it shows the pumps performance, dimensions, connections and so on. * Indbygningslængde, perhaps it has something to do with internal fittings, I'm actually not sure... ** Koldtvandsudførsel, is the removal, or taking out, of cold water... hmm. dunno... Oh, and the words unioner and ventiler (see the "connection"-part) means unions (?) and valves... Is there any reason I shouldn't buy this pump?

08-16-2001, 12:24 PM	#2
BladeRunner Cooling Savant Join Date: Jul 2001 Location: Chesterfield Uk Posts: 459	I've a 15/60 here that I will be using in my Stealth Cooling but they are probably not Ideal for most water cooling projects. Firstly the are designed for central heating systems and are heavy cast units not easy to mount. They also require careful priming before running or you will kill the bearings and they have to be mounted in a certain plane and bleed of air in the shaft area. A coolant mix is essential if you want the bearings to last. The other undesirable factor is they get hotter than the Eheim would in use, (which isn't a major issues in my cooling system), but would be to those with air cooled rads. Here's a pic of Gasman's system using one and he just recently asked if our 1250 Eheims, (myself and others are using one at the moment), run cooler. the thread is HERE scroll down to Gasman's reply It would work but I think in the long run you'd be better off with the Eheim. After all Eheims are designed for Aquarium filtration which is similar to your PC water-cooling, Grundfos UPS pumps are for domestic/light industral hot water circulation. __________________ Zero Fan Zone

08-16-2001, 03:57 PM	#4
BladeRunner Cooling Savant Join Date: Jul 2001 Location: Chesterfield Uk Posts: 459	Yes I agree it will work with cold plain water, but it's main use and what it is really designed for is Central heating systems. Regardless of what they say it will last longer if it has some extra lubricant in the water to "help" the bearings, just like the water-pump on a car engine will last longer with an antifreeze coolant than just plain water in the cars cooling system. Central heating systems use fernox but antifreeze is ok too. I do believe you will be happier with the Eheim, it's light, quite easy to mount, doesn't get hot, and can be easily submerged but don't just take my word for it. Being able to polish a few lumps of metal and dig a large hole doesn't qualify me as an oracle on everything water-cooled What is your system layout? do you require that huge flow rate? as that may make some differences to the answer?. I stupidly managed to crack the very thin plastic case on my Eheim by using a tapered fitting. It is fixed with araldite and doesn't leak but as such I'm sure you wouldn't want it. I also want to keep it for "emergencies" and a possible mobile box later. Eheims are not excessively priced in the UK my 1250 was about £46 I think, what's the Eheim 1250 price where you are? __________________ Zero Fan Zone

08-16-2001, 11:00 PM	#6
mkosem Cooling Savant Join Date: May 2001 Location: here Posts: 494	that pic is not a water pump!! --MAtt __________________ If you can't cool it, blow it up!! http://www.mattkosem.com

08-17-2001, 03:02 AM	#7
BladeRunner Cooling Savant Join Date: Jul 2001 Location: Chesterfield Uk Posts: 459	What pic is not a water-pump? __________________ Zero Fan Zone

08-16-2001, 07:36 PM	#5
Mumrik Cooling Neophyte Join Date: Jul 2001 Location: Denmark Posts: 39	The setup will not be all that demanding, it'll probably (not bought yet) be a heather core from Dtek and one of Fixittt's Copper Spiral Blocks (He got Dtek to sell them for him)... I am aware that the Grundfos pump would be insane overkill, that's why I wanted to run it at it's lowest speed (at which it only draws 30W). The reason I was concidering it is simply the fact that it was cheaper than my first choice, the Eheim 1250 which I (since I haven't been able to locate it here in Denmark) would have to pay about $5 more plus shipping for (ordering from Sweden)... Thanks for helping by the way EDIT: Kinda forgot to mention that it probably will be cooling a palomino...

08-17-2001, 04:49 PM	#9
mkosem Cooling Savant Join Date: May 2001 Location: here Posts: 494	there was a different pic there before, some weird pornographic pic with a woman with a pineapple between her legs. Heh, IDK, prolly just a fluke. --MAtt __________________ If you can't cool it, blow it up!! http://www.mattkosem.com

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