Mak 4 gph at 14'
 

Does anybody know what the gph is at 14' height for a Mak 4? I can't seem to find any graphed specs for the Mak 4 or Mak 5 on the web. The only info I have is 100gph at 5 feet from JL's descriptors.
Thanks
CWLee

I can't find any charts either, but if you can get to a store that sells them, the head pressure chart is right on the box.

I just spent the last 45 mins looking on the net and i have came up with
1180 @4'
590@8'
295 @12'

Here's something try running the return line to a 1/2" pvc would that help it says that it will run at 22 ft so shrink the line..

from looking at the site im guessing this sorry i couldn't copy the link .may be i am reading it wrong
but a pressure pump for that.i don't know sounds funny eh...


HTH

sorry i couldnt help ya out .

mike

ok..... looking at the mak 4 box , and if grade three was good to me , my calculations are 450gph at 14 foot head. Or something like that. max feet is 22 for a mak 4. On the box it is in meters and litres per minute. So worse case here, lets say 5 meters is close to 14 feet x 32 litre per minute as according to the box. so 60 min x 32 = 1920 ltr per hr, divide x 4 for gallons = 480 gph. again this is a rough estamate. HTH

oops. Just go to RC and look down bottom left for head calculator and pick your pump and head hight etc. Their calculator said 700+ gph for 14'. :eek: very nice. of coarse that depends on your plumbing. cheers

Here you go...

http://reefs.org/library/pumps/pumps...mak4_curve.jpg

Well that Sums it up pretty nice
Well done there Tang MAN .



mike :mrgreen:

Mike, by reducing the line size you actually add head to the equation by creating more frictional loss. if you want to reduce the head caused by frictional and shear you have to increase the pipe size. so lets say you had a 5 foot rise with 3/4" line and a few elbows and such that added up to another 2.5 ft of head your total head would be 7.5 foot. by decreasing the line size to 1/2" you will raise that to ~9ft of head and by increasing the line to 1" you could lower it to ~6.5 ft of total head.. these numbers are off the top of my head so don't use a head calculator and say I'm wrong with my numbers please :mrgreen: the intention is an approximate example of how changing line size could help.

Steve

On another note if you also increase the size too much then it will add water weight restriction.

Let's say you plumbed a 10ft vertical in 2" pvc than that water would weigh alot as well.

I think :biggrin:

Bigger the pipe the less you will lost your flow as water will travel more slowly inside the pipe so you eliminate a lot of friction.

Canadian even if the pipe is 20 inch wide the pump will not see any difference. Pump are only sensitive to the head and friction not the size of the pipe.

pressure in watter calculate in height not in wide, you will have the same pressure 20 feet deep in a pool than 20 feet deep in a 20 mile long lake