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Running a Pump (D4) at 7V?

S

SevenWords

Limp Gawd
Joined
Sep 8, 2006
Messages
501
I just started leak testing on my first W/C setup and my pump is considerably louder than I thought it would be. The first pump I got with my system turned out to be dead, and since the bracket was already mounted I bought another pump part without the bracket and replaced the dead one. It pumps fine now, but is pretty loud and also makes my reservoir bubble quite a bit because its so powerful. I was wondering if I would damage the pump by running it at 7v instead of 12v? I run all my fans (Yate Loons) like this and they're silent, so I was hoping it would help the pump noise and the turbulence in the res.
 
I ran the D4 in my big clear box at 7V for a year and a half. It still ran when I replaced it with a D5.
 
You might also try finding sheet rubber and rubber washers (neoprene) is ok too at a good hardware store.

make sure the holes for the screws are a good bit larger than the scew diameter so the screw does not touch the case.

screw head ( the black hex head cap screws are very sexy, metric but who cares )
large flat washer
rubber washer
mounting bracket
2 layers of rubber sheet cut to match the base of the bracket
case
rubber washer
large flat washer
split lock washer
nut ( the self locking ones work well)

and just snug it down, dont overtighten.

you may have done something like this or its not practiacle in your case, just a suggestion.
 
The pump is mounted on the thick piece of rubber that comes with Danger Den pumps, but I will try and and some more sound deadening stuff to it. Still, it seems a hell of a lot louder than it should, and I'm not sure its just how its mounted.
 
SevenWords said:
The pump is mounted on the thick piece of rubber that comes with Danger Den pumps, but I will try and and some more sound deadening stuff to it. Still, it seems a hell of a lot louder than it should, and I'm not sure its just how its mounted.
Click to expand...

The D4's are just loud. No matter how you mount it, it's still going to be loud. I turned mine down to 7V to quiten it down. When I replaced it with the D5, the D5 was a great deal quieter...even when I turned it all the way up on the pentiometer (with 12V on the molex).
 
Mark305TBI said:
I ran the D4 in my big clear box at 7V for a year and a half. It still ran when I replaced it with a D5.
Click to expand...

When I got home I tried running my pump off of 7v and it wouldn't even turn on, switched back to 12v and it ran fine, but was still freaking loud. Did you do anything else other than move the ground to the 5v line when you switched yours?
 
GET THIS : Petra's Gel Stuff

It works wonders at dampening vibrations. If you have to secure the pump like I did I would advise using zip ties and not screws to lessen transmission of vibrations. (Not Zip Ties alone, but zip ties with the gel stuff)
 
SevenWords said:
When I got home I tried running my pump off of 7v and it wouldn't even turn on, switched back to 12v and it ran fine, but was still freaking loud. Did you do anything else other than move the ground to the 5v line when you switched yours?
Click to expand...

All I did was move the ground wire from the -12v spot to the +5v spot.
 
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