panworld pump :( - Page 2

newnano · 05/18/2006, 08:45 AM

its only reduced to the actual diameter of the pump intake and that is 3 feet above the intake

BreadmanMike · 05/18/2006, 01:05 PM

Quote:

Originally posted by newnano
aquatic man---on these returns that you have, do you have the return split to more than just one outlet?

Yes, on one setup I have it split into 2 - 3/4" returns and on another I have it split into 2 - 1" returns. All my plumbing is spa flex and pvc fittings after the pump and they are hard plumbed into my sumps.

newnano · 05/18/2006, 01:13 PM

i dont get it. i give up. im going to see if this other pump panworld is sending me will work.

ha! just noticed we are neighbors aquaticman. i grew up in Lansing

BreadmanMike · 05/18/2006, 01:29 PM

No kidding! You're the second person I've spoke to on here that escaped this area! The other guy moved to Az.

I live right over by Pano's off Burnham Ave. Been here for 27 years.

Out of curiosity, have you tried putting some 3/4" pvc or tried to reduce in any way the 2 - 1" bulkheads. Maybe that added pressure will quiet it down?

newnano · 05/18/2006, 01:33 PM

im still in the area though just over the border.

yes, i have a 1in to 3/4 reducer screwed in the bulkhead in the tank and 3/4 lockline in that.

i think the lack of pressure is causing the pump to over-rev and vibrate.

BreadmanMike · 05/18/2006, 02:05 PM

That should be plenty of pressure with the two outlets reduced...
Keep us posted on how this third pump works out.

RichConley · 05/18/2006, 02:18 PM

Quote:

Originally posted by newnano
im still in the area though just over the border.

yes, i have a 1in to 3/4 reducer screwed in the bulkhead in the tank and 3/4 lockline in that.

i think the lack of pressure is causing the pump to over-rev and vibrate.

Its cavitating. When you put pressure on the output it stops cavitating because the impellar slows down.

3/4 intake is NOT big enough for this pump, especially if you're pulling through 3 feet of tube.

RichConley · 05/18/2006, 02:20 PM

Quote:

Originally posted by newnano
its only reduced to the actual diameter of the pump intake and that is 3 feet above the intake

Most pumps need larger piping than their intakes. Usually about twice the side. The fact that its reduced 3 feet above the intake, and not right in front of it, makes it much worse. You're putting a lot of restriction on the intake of this pump, and that is why it is cavitating. When you put back pressure on the output, it doesnt need to suck in as much water, so it stops cavitating.

newnano · 05/18/2006, 03:09 PM

i tried that as well. i had a larger pipe going right up to the end.

that is incorrect though. i talked with two different engineers and they both said that the pumps are designed to run on what ever the inlet and outlet diameters are.

plus if i put stick my hand over the intake and restrict the water going to the pump the noise stops as i stated previously.

BreadmanMike · 05/18/2006, 04:46 PM

Out of curiosity.... Did you have Kurt drill your CL for you? I read that your tank was a GC tank in another thread, and he called me when he was drilling a 60 cube from them.

05/18/2006, 08:45 AM	#26
newnano Registered Member Join Date: Aug 2004 Location: NWI Posts: 720	its only reduced to the actual diameter of the pump intake and that is 3 feet above the intake

05/18/2006, 01:13 PM	#28
newnano Registered Member Join Date: Aug 2004 Location: NWI Posts: 720	i dont get it. i give up. im going to see if this other pump panworld is sending me will work. ha! just noticed we are neighbors aquaticman. i grew up in Lansing

05/18/2006, 01:29 PM	#29
BreadmanMike Moved On Join Date: Sep 2005 Location: Illinois Posts: 4,886	No kidding! You're the second person I've spoke to on here that escaped this area! The other guy moved to Az. I live right over by Pano's off Burnham Ave. Been here for 27 years. Out of curiosity, have you tried putting some 3/4" pvc or tried to reduce in any way the 2 - 1" bulkheads. Maybe that added pressure will quiet it down?

05/18/2006, 01:33 PM	#30
newnano Registered Member Join Date: Aug 2004 Location: NWI Posts: 720	im still in the area though just over the border. yes, i have a 1in to 3/4 reducer screwed in the bulkhead in the tank and 3/4 lockline in that. i think the lack of pressure is causing the pump to over-rev and vibrate.

05/18/2006, 02:05 PM	#31
BreadmanMike Moved On Join Date: Sep 2005 Location: Illinois Posts: 4,886	That should be plenty of pressure with the two outlets reduced... Keep us posted on how this third pump works out.

05/18/2006, 03:09 PM	#34
newnano Registered Member Join Date: Aug 2004 Location: NWI Posts: 720	i tried that as well. i had a larger pipe going right up to the end. that is incorrect though. i talked with two different engineers and they both said that the pumps are designed to run on what ever the inlet and outlet diameters are. plus if i put stick my hand over the intake and restrict the water going to the pump the noise stops as i stated previously.

05/18/2006, 04:46 PM	#35
BreadmanMike Moved On Join Date: Sep 2005 Location: Illinois Posts: 4,886	Out of curiosity.... Did you have Kurt drill your CL for you? I read that your tank was a GC tank in another thread, and he called me when he was drilling a 60 cube from them.