Question Re: reservoirs vs. inline

Ruiner · 10-21-2003, 09:01 AM

If you've seen my rig in progress here: http://forums.procooling.com/vbb/sho...&threadid=8086

you'll notice how close the pump inlet is to the rad. That distance will be shorter with the fan/ducting mod I'm working on, and getting the tubing to make 2 tight 90 turns over such a distance is impossible.

Putting a tall, cylindrical reservoir in place (inlet from rad on top, outlet to pump on bottom) would take care of this, although I could face the pump inlet the other way and loop the tube around.

My question: do full inline systems flow more than reservoir rigs? I've read that centrifugal pumps have minimal 'suction', but have also seen whirlpools in pump-mounted reservoirs (such as pH's article). That implies that there is some suction contributing to flow which would be lost in a reservoir. Which is correct?

I don't have a problem waiting a long time to bleed the system through a T-tube.

pHaestus · 10-21-2003, 11:36 AM

In the best case scenario, your flow rate without a res will be equal to flow rate of a properly installed res at inlet. At worst case it will be worse. Read up on NPSH; that is what comes into play. Use a T with large connector from T to pump if you do go with T; try to avoid restricting the inlet at all cost.

Ruiner · 10-21-2003, 11:54 AM

The res' that hook directly to the Eheim pumps look poorly designed in that regard....restrictive inlets.

pHaestus · 10-21-2003, 12:01 PM

Yea the best plan is to use a short run over oversized hose and barbs from pump to res.

Ruiner · 10-21-2003, 12:14 PM

I'm considering this:

Remove relatively restrictive intake barb from pump.
Obtain container (plastic Tums bottle perhaps or capped pvc tube that I can thread into) and drill hole same size as Eheim intake 'neck'.
Either o-ring/grommet the intake into the hole, or just cement/jbweld the eheim cover to the bottle side. Intake opening should then project into middle of container bottom.

Add nipple for res inflow.

10-21-2003, 09:01 AM	#1
Ruiner Cooling Savant Join Date: May 2003 Location: New Smyrna, FL Posts: 258	Question Re: reservoirs vs. inline If you've seen my rig in progress here: http://forums.procooling.com/vbb/sho...&threadid=8086 you'll notice how close the pump inlet is to the rad. That distance will be shorter with the fan/ducting mod I'm working on, and getting the tubing to make 2 tight 90 turns over such a distance is impossible. Putting a tall, cylindrical reservoir in place (inlet from rad on top, outlet to pump on bottom) would take care of this, although I could face the pump inlet the other way and loop the tube around. My question: do full inline systems flow more than reservoir rigs? I've read that centrifugal pumps have minimal 'suction', but have also seen whirlpools in pump-mounted reservoirs (such as pH's article). That implies that there is some suction contributing to flow which would be lost in a reservoir. Which is correct? I don't have a problem waiting a long time to bleed the system through a T-tube.

10-21-2003, 11:36 AM	#2
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	In the best case scenario, your flow rate without a res will be equal to flow rate of a properly installed res at inlet. At worst case it will be worse. Read up on NPSH; that is what comes into play. Use a T with large connector from T to pump if you do go with T; try to avoid restricting the inlet at all cost.

10-21-2003, 11:54 AM	#3
Ruiner Cooling Savant Join Date: May 2003 Location: New Smyrna, FL Posts: 258	The res' that hook directly to the Eheim pumps look poorly designed in that regard....restrictive inlets.

10-21-2003, 12:01 PM	#4
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	Yea the best plan is to use a short run over oversized hose and barbs from pump to res.

10-21-2003, 12:14 PM	#5
Ruiner Cooling Savant Join Date: May 2003 Location: New Smyrna, FL Posts: 258	I'm considering this: Remove relatively restrictive intake barb from pump. Obtain container (plastic Tums bottle perhaps or capped pvc tube that I can thread into) and drill hole same size as Eheim intake 'neck'. Either o-ring/grommet the intake into the hole, or just cement/jbweld the eheim cover to the bottle side. Intake opening should then project into middle of container bottom. Add nipple for res inflow.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)