How to calculate parasitic loss in my plumbing system.

rjjr1963 · 02/01/2016, 12:58 AM

I need to have about 600 gph delivered to DT tank. I'm going to use an a/c external pump like the Iwaki.

The pump will be plumed to a 4 position manifold feeding a carbon, GFO and spare media container. It will also feed the refugium which sits beside the DT. There will be a number of twists and turns. The manifold and accessories will be in a utility room right behind DT. I plan on using flex pvc to minimize the number of sharp turns.

Whit that in mind I'll need about 900 gph. The question is how many gph am I going to loose to head pressure and parasitic loss.

Dkuhlmann · 02/01/2016, 03:21 AM

Personally I'd figure 10%-20% the higher to be on the safe side, but likely 10% would cover it.

homer1475 · 02/01/2016, 05:15 AM

RC has a calculator on the main page for head loss and plumbing loss. It asks for vertical run length, horizontal run lengths, any T's, elbows, valves, etc, etc.

http://reefcentral.com/index.php/head-loss-calculator

rjjr1963 · 02/01/2016, 07:22 PM

Thanks. That's exactly what I need.

02/01/2016, 12:58 AM	#1
rjjr1963 Registered Member Join Date: Dec 2015 Location: Nebraska/Missouri Posts: 770	How to calculate parasitic loss in my plumbing system. I need to have about 600 gph delivered to DT tank. I'm going to use an a/c external pump like the Iwaki. The pump will be plumed to a 4 position manifold feeding a carbon, GFO and spare media container. It will also feed the refugium which sits beside the DT. There will be a number of twists and turns. The manifold and accessories will be in a utility room right behind DT. I plan on using flex pvc to minimize the number of sharp turns. Whit that in mind I'll need about 900 gph. The question is how many gph am I going to loose to head pressure and parasitic loss. __________________ 72x24x16 115 gallon under construction Current Tank Info: 40 gallon reef

02/01/2016, 03:21 AM	#2
Dkuhlmann Registered Member Join Date: Mar 2015 Location: NW Iowa Posts: 8,823	Personally I'd figure 10%-20% the higher to be on the safe side, but likely 10% would cover it. __________________ Previous tanks: 200 gal fowlr 9" Emperor Angel and many different butterfly fish 4" maroon clown and several other fish, 50 gal sump, 40 gal mixed reef/fish mostly softies and LPS. Current Tank Info: 40b 750 gph 45 lbs lr, 2"-3" sand, 165w full spectrum dimable LED, 20 gal sump/refugium 30 lbs lr, Bak Pak 2 skimmer, 4" sock temp 79-80, sg 1.026, NH3 0, NO2 0, NO3 <10, ph 8.2, calc 400, mag 1300

02/01/2016, 05:15 AM	#3
homer1475 Registered Member Join Date: Mar 2015 Location: Upstate NY Posts: 5,313	RC has a calculator on the main page for head loss and plumbing loss. It asks for vertical run length, horizontal run lengths, any T's, elbows, valves, etc, etc. http://reefcentral.com/index.php/head-loss-calculator __________________ 80G SCA Build: http://reefcentral.com/forums/showthread.php?t=2560256 Originally posted by der_wille_zur_macht: "He's just taking his lunch to work"

02/01/2016, 07:22 PM	#4
rjjr1963 Registered Member Join Date: Dec 2015 Location: Nebraska/Missouri Posts: 770	Thanks. That's exactly what I need. __________________ 72x24x16 115 gallon under construction Current Tank Info: 40 gallon reef