Have you ever measured real water pump output flow rate?
 

and maybee a cya line about the fact the numbers are for clean pipe, clear water and for
the soft stuff it must be non crushed.

--
Richard Reynolds

Have you ever measured real water pump output flow rate?
 

"Richard Reynolds" wrote in message news:AiFNb.9840$ct4.1163@lakeread05...
and maybee a cya line about the fact the numbers are for clean pipe,
clear water and for the soft stuff it must be non crushed.

I understand that old pipe will cover with slime from inside
and restrict flow more than new one, but how big change does it
make we are pumping sea-water instead clean one in the calculations?
How does it change the pump rating? I have made my test with
tap water - should I expect sea-water to behave anything differently?

Have you ever measured real water pump output flow rate?
 

I understand that old pipe will cover with slime from inside
and restrict flow more than new one, but how big change does it
make we are pumping sea-water instead clean one in the calculations?
How does it change the pump rating? I have made my test with
tap water - should I expect sea-water to behave anything differently?

on its own salt water shouldnt make a diff, some thing to consider is that those numbers
were for 100' of pipe even 5% wont effect most reef related useage. and I have no idea
what diff could be made from the slime on the inside


also as i was skimming the book for info on SW vs FW i ran across some interesting
formula's donno how well they do, the book is kinda sorta old :)

horsepower to raise water

horsepower = (gpm * sg * heatft) / 3960

sg = specific gravity of the water.



cost to pump water

$/hr = (gpm*headft*0.746*rate/kwh) / ( 3960*pump effiency * motor effiency)

external motor 90% good average
internal motor 95% good average

centrifical pump 70% good average


--
Richard Reynolds

Have you ever measured real water pump output flow rate?
 

Interesting... My own comparison between external motor (Little Giant 3-MC)
and centifugal pump (QuietOne 3000) shown much better efficiency of
the second one. They both pump almost the same amount of water per hour but
they differ in power consumption with a factor of 2 (LittleGiant=2xQuietOne).
Thanks Rich!

"Richard Reynolds" wrote in message news:qlLNb.9921$ct4.9301@lakeread05...
I understand that old pipe will cover with slime from inside
and restrict flow more than new one, but how big change does it
make we are pumping sea-water instead clean one in the calculations?
How does it change the pump rating? I have made my test with
tap water - should I expect sea-water to behave anything differently?

on its own salt water shouldnt make a diff, some thing to consider is that those numbers
were for 100' of pipe even 5% wont effect most reef related useage. and I have no idea
what diff could be made from the slime on the inside


also as i was skimming the book for info on SW vs FW i ran across some interesting
formula's donno how well they do, the book is kinda sorta old :)

horsepower to raise water

horsepower = (gpm * sg * heatft) / 3960

sg = specific gravity of the water.



cost to pump water

$/hr = (gpm*headft*0.746*rate/kwh) / ( 3960*pump effiency * motor effiency)

external motor 90% good average
internal motor 95% good average

centrifical pump 70% good average


--
Richard Reynolds

Have you ever measured real water pump output flow rate?
 

"Richard Reynolds" wrote in message news:41FNb.9835$ct4.3225@lakeread05...
Thank you. I know many people using ribbed vinyl pool hose for their
overflow boxes drainage... I see that smooth vinyl is much better.

yea :)

Do you have in this table values for 1" as well?

from 1/4" to 3" in 1/4" incriments

material 1"
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
smooth vinyl 15
ribbed vinyl 74.4
pvc 7.1
abs 7.1

I have applied what I learned from your book in my setup and I see
big difference! I have replaced my 3/4 return line constructed with
1"-3/4" reduction, 10' of 3/4" hose and two 90' 3/4" elbows with
2' of 1" hose and 1"-1.5" adaptor, 1.5" P-TRAP (180' elbow) and after
that 1.5" to 3/4" reduction and than 3/4" slip elbow and with
the same pump giving me before only 340gph now gives me probably
much more AMIRACLE overflow box ("prefilter box") cannot keep up
with the flow. BTW - what is the gph rating for this prefilter box?

I have to put this pump on valve now and I was worrying it will not
be enough :-))) I learned my lesson - even on small piping like ours
it makes a big difference what diameter of tube you use...

ABS, CPVC - is it safe for reef plumbing?
 

"Richard Reynolds" wrote...
from 1/4" to 3" in 1/4" incriments

material 1"
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
smooth vinyl 15
ribbed vinyl 74.4
pvc 7.1
abs 7.1

You have mentioned ABS material above - is it safe to use it for
plumbing reef or not? And the same with CPVC - it is ok, too?

ABS, CPVC - is it safe for reef plumbing?
 

You have mentioned ABS material above - is it safe to use it for
plumbing reef or not? And the same with CPVC - it is ok, too?

i responded in a new thread to this question in case you miss it :)

--
Richard Reynolds