back pressure on pump?

[da1jewfish]

I have asked a branch of this question without much response, so I will try it a different way.

I am going to be pumping water from outside my house to my fish tanks inside approximately 50 feet, but no more than 50'.
I bought a Mag 18, what size hosing should I use that won't put much back pressure on the pump? I was reccommended by the manufacturer representenative to use 1 1/2" - 2" hosing. then I talked to another knowledgable friend who said 3/4" or 1" will be just fine. The output on the pump is 3/4"

Input is appreciated.

 

[psteeleb]

using the curve here
http://www.bestnest.com/bestnest/RTProduct.asp?SKU=PON-02728

and the calcualtor here
http://www.globalspec.com/calculators/loss-in-fluid-lines

assuming a 5 ft head to start I get 120 GPH or 20 GPM (minute)

you may not get any flow with 3/4 inch tubing (trickle) as it will loose an equivalent of 30 ft of head

going with 1" you loose 10 ft (so 15 total) and you end up with about 420 GPH

I did not add any in for changes in direction (like elbows or sharp bends)

HTH

 

[da1jewfish]

"assuming a 5 ft head to start I get 120 GPH or 20 GPM (minute)"

with what pump?


thanks for the info. I think I'm goin to go with 1 1/4" hose.

 

[psteeleb]

<a href=showthread.php?s=&postid=12492610#post12492610 target=_blank>Originally posted</a> by da1jewfish
"assuming a 5 ft head to start I get 120 GPH or 20 GPM (minute)"

with what pump?


thanks for the info. I think I'm goin to go with 1 1/4" hose.

mag 18 with 5 ft head = 1200GPH divided by 60 = 20 GPM as a starting point

zero head would be unrealistic so I just picked a number to get a reference point for the rest of the calculation

Hth