View Full Version : Pump/Plumbing question...
Whatigot
11-21-2008, 06:41 PM
Howdy all.
I am about to pick up a quietone 6000 that has a 1' outlet but my in situ plumbing is 3/4'...
Is this doable or no no?
what effects will this have?
thanks kindly.
albert_dao
11-21-2008, 06:50 PM
You can do it, but you will get reduced flow due to the internal friction of the reduced diameter.
Whatigot
11-21-2008, 07:10 PM
meaning same amount of water being pushed through a smaller diameter than what pump is rated at will make for less GPH?
Any idea on the percentage loss?
Thanks Albert....
sphelps
11-21-2008, 07:33 PM
If my rough calculations are even close to correct you'll probably get about 120% more head pressure ultimately meaning about 75% less flow. That's comparing 3/4" pipe to 1" pipe. But it really depends on your pipe network more than anything.
I would re-plumb to 1.25" pipe, that should give you even more flow than the 1".
Whatigot
11-21-2008, 07:41 PM
I won't replumb.
Just put the plumbing in in the first place and the pump I am upgrading from is so far inferior to the quiet one 6000 that I think I'll still come out on top.
Good learning experience in any case just to see.
Just out of curiosity, what IS the math behind that 75% loss Phelps?
sphelps
11-21-2008, 07:45 PM
what IS the math behind that 75% loss Phelps?
Complex iterations to solve for the pipe friction coefficient and then a little bernoulli, but to be honest I can't remember exactly how to do it anymore I just happen to still have the program in my old calculator:mrgreen: I think my fluid mechanics days are behind me now, well I hope so anyway.
sphelps
11-21-2008, 07:48 PM
I also just remembered about the RC head loss calculator (http://reefcentral.com/calc/hlc2.php), that would have probably been easier.
Whatigot
11-21-2008, 07:48 PM
whoah, you speak klingon?
lol
I appreciate the help Phelps, glad someone on here is smart enough to answer these questions for me.
:mrgreen:
Whatigot
11-21-2008, 07:59 PM
calc says I'll still have 811 GPH, plenty for me but a huge loss from the 1500 it has at 0 head....
Knew there was a calculator somewhere....
MikeP
11-21-2008, 08:32 PM
Don't forget about how fast your tank's overflow drain is. I have a quietone 6000 on my tank but had to "T" it off to reduce flow cause my drain bulkhead would never keep up otherwise. Great pump choice IMO, not that I have lots of experience with other pumps but the quietone has been working great on my tank for the last year and a half.
HTH
inspector
11-21-2008, 10:42 PM
HI How have you piped it? I piped 1" then 1"x3/4"x3/4" tee 3/4" to tank and 3/4" to front of sump it goes through the sump and calerpa doesn't restrict the pump.75% of flow into tank keeps up with return .
Paul
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