Pump power, can you get it through a molex?

mshannon · 10-30-2002, 09:05 PM

Well here I sit, reviewing pumps, and it hits me, I don't want another wire sticking out of the back of my machine.

So, after a few google searches I am still a bit muddled, so can you get pump power from your PSU? Do you splice the power cords?

So what works?

-M

sunblade · 10-30-2002, 09:23 PM

I remember some of the older procooling.com projects showing how to split a 120v line (or whatever current you use) off the connector in your powersupply. This would keep all the wiring inside the case, but it requires PSU modification.

<edit>
Found the article:
http://www.procooling.com/articles/h..._-_day_3.shtml
</edit>

mfpmax · 10-30-2002, 09:50 PM

I modified my powersupply...

That connects to this relay.

redleader · 10-30-2002, 11:45 PM

Sealed electrical plugs are $1 at AceHardware. Just buy one and solder the ends onto the leads inside your supply. Takes 10min and you get a nice outlet inside your case for the pump.

Brad · 10-31-2002, 01:39 AM

if you've got a 12v pump it'd be fairly easy..... but for a 120v pump you need to do something like those pictures showed

nexxo · 10-31-2002, 01:20 PM

You want a capable 12V pump? You got it. Johnson CM30P7-1 is your babe. Small, powerful (414 GPH @ 3ft head) economical (12V @ 2.2 A, 26W) and solid Swedish engineering. It's magnetic drive (silent, not even the 50-60Hz mains buzz) and continuously rated.

Check out the pump roundup thread.

ezlid · 10-31-2002, 03:11 PM

Caution - If you do wire in an AC pump using a molex, mark or color the connectors so you don't plug in a hard drive or other device. In the heat of trouble-shooting you could let the smoke out of something. It's best to use some other style of connector to avoid that.

bigben2k · 10-31-2002, 03:31 PM

Quote:

Originally posted by nexxo
You want a capable 12V pump? You got it. Johnson CM30P7-1 is your babe. Small, powerful (414 GPH @ 3ft head) economical (12V @ 2.2 A, 26W) and solid Swedish engineering. It's magnetic drive (silent, not even the 50-60Hz mains buzz) and continuously rated.

Check out the pump roundup thread.

You call $179 economical? I've got a piece of land in Florida for ya...

mfpmax · 10-31-2002, 03:35 PM

Quote:

Originally posted by bigben2k
You call $179 economical? I've got a piece of land in Florida for ya...

So do I...let me move my stuff first

FuzzyFace · 10-31-2002, 07:38 PM

When I run 120 volts into a molex I use the center two (normally ground) of the four pins. With nothing connected to the outside two pins. If plugged into 12 volt devices and both grounds were used in the device it would cause a short in the 120 volt line and melt something.

ezlid · 10-31-2002, 11:01 PM

Quote:

Originally posted by FuzzyFace
When I run 120 volts into a molex I use the center two (normally ground) of the four pins. With nothing connected to the outside two pins. If plugged into 12 volt devices and both grounds were used in the device it would cause a short in the 120 volt line and melt something.

What you will probably melt is the two pins in the molex and the HD or whatever you ran 120ACV into. And who knows what else will be damaged. Good luck trying to RMA a piece of hardware fried like that. Still best to use unique connectors. Radio Shack or any electrical house has dozens to choose from.

nexxo · 11-01-2002, 04:57 PM

I was referring to its power consumption as economical (this is why voltage, amperage and watts are mentioned in the context of that statement). It won't burn your PSU out. The price of the thing is of course quite expensive in most people's book.

But hey, perfections costs. If it was any other piece of hardware (HD, GPU, Mobo, CPU etc.) then $179,-- would not raise such eyebrows. You no want to pay? You buy an Eheim, which is an excellent mains powered pump, for half the price. No sweat.

10-30-2002, 09:05 PM	#1
mshannon Cooling Neophyte Join Date: Sep 2002 Location: Tampa, FL Posts: 11	Pump power, can you get it through a molex? Well here I sit, reviewing pumps, and it hits me, I don't want another wire sticking out of the back of my machine. So, after a few google searches I am still a bit muddled, so can you get pump power from your PSU? Do you splice the power cords? So what works? -M

10-30-2002, 09:50 PM	#3
mfpmax Cooling Savant Join Date: Oct 2000 Location: Rockledge,FL,US Posts: 731	I modified my powersupply... That connects to this relay. __________________ My old and retired watercooling setup. Watercooled K6-2 450 at 600 Also Retired - Watercooling an XP1800@1782MHz

10-31-2002, 01:39 AM	#5
Brad Thermophile Join Date: Oct 2001 Location: Nuu Zeeelin Posts: 3,175	if you've got a 12v pump it'd be fairly easy..... but for a 120v pump you need to do something like those pictures showed __________________ 2x P3 1100's at 1400, Abit VP6, 2x Corsair 256mb PC150 sticks, 20gb 'cuda ATA-III, 2x 40gb 'cuda ATA-IV in raid 0. 20" Trinitron. No fans 2x 2400+ at 2288mhz (16.0 x 143), Iwill MPX2, 2x Kingmax PC-3200 256mb sticks, 4x 20gb 60gxp in Raid 5 on a Promise SX6000. Asus Ti4200 320/630. Cooled by Water

10-31-2002, 01:20 PM	#6
nexxo Cooling Savant Join Date: Jul 2002 Location: Brimingham, UK Posts: 385	You want a capable 12V pump? You got it. Johnson CM30P7-1 is your babe. Small, powerful (414 GPH @ 3ft head) economical (12V @ 2.2 A, 26W) and solid Swedish engineering. It's magnetic drive (silent, not even the 50-60Hz mains buzz) and continuously rated. Check out the pump roundup thread. __________________ "There is a thin line between magic and madness"

10-31-2002, 07:38 PM	#10
FuzzyFace Cooling Neophyte Join Date: Dec 2001 Location: California high desert Posts: 52	When I run 120 volts into a molex I use the center two (normally ground) of the four pins. With nothing connected to the outside two pins. If plugged into 12 volt devices and both grounds were used in the device it would cause a short in the 120 volt line and melt something. __________________ Have fun, FuzzyFace

10-30-2002, 09:23 PM	#2
sunblade Registered User Join Date: Jul 2001 Location: USA Posts: 156	I remember some of the older procooling.com projects showing how to split a 120v line (or whatever current you use) off the connector in your powersupply. This would keep all the wiring inside the case, but it requires PSU modification. <edit> Found the article: http://www.procooling.com/articles/h..._-_day_3.shtml </edit>

10-30-2002, 11:45 PM	#4
redleader Thermophile Join Date: Jun 2001 Location: The deserts of Tucson, Az Posts: 1,264	Sealed electrical plugs are $1 at AceHardware. Just buy one and solder the ends onto the leads inside your supply. Takes 10min and you get a nice outlet inside your case for the pump.

10-31-2002, 03:11 PM	#7
ezlid Cooling Neophyte Join Date: Sep 2001 Location: Houston, TX Posts: 55	Caution - If you do wire in an AC pump using a molex, mark or color the connectors so you don't plug in a hard drive or other device. In the heat of trouble-shooting you could let the smoke out of something. It's best to use some other style of connector to avoid that.

11-01-2002, 04:57 PM	#12
nexxo Cooling Savant Join Date: Jul 2002 Location: Brimingham, UK Posts: 385	I was referring to its power consumption as economical (this is why voltage, amperage and watts are mentioned in the context of that statement). It won't burn your PSU out. The price of the thing is of course quite expensive in most people's book. But hey, perfections costs. If it was any other piece of hardware (HD, GPU, Mobo, CPU etc.) then $179,-- would not raise such eyebrows. You no want to pay? You buy an Eheim, which is an excellent mains powered pump, for half the price. No sweat. __________________ "There is a thin line between magic and madness"

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