which calculator is more accurate

[rfgonzo]

I have a Mag-24 pump that is going to be running with 13 feet of head. Danner flow chart says 650 gph at 13 feet head. The reef central calculator says 866 gph at 13 feet head. That is a difference of 216 gph. Which one is more accurate? I want to turn my 210 gal over 4 times per hour. This would work if the RC calculator is more on point but not the case if Danner is right.

 

[mcgyvr]

One would hope that the manufacturers data is accurate...

I would trust it over the RC calculator personally..

 

[rfgonzo]

One would hope that the manufacturers data is accurate...

I would trust it over the RC calculator personally..

Agreed, but a lot of manufacturers also under rate their products.

 

[HBtank]

I would assume the RC calculator uses manufacturer specifications (i.e. flow, max psi, head etc..), so the "underrating" should be on both, or the calculator is not capturing the curve for some reason specific to the pump.

Just call it 750

 

[Dross]

According to the Danner web site, the Mag 24 delivers 720 GPH at 15 ft. and 1100 GPH at 10. The calculator probably interpolates between the values. The 650 GPH at 13 ft. looks more like a Mag 18.

 

[lapin]

Since you have the pump you can always measure the output.

 

[rfgonzo]

According to the Danner web site, the Mag 24 delivers 720 GPH at 15 ft. and 1100 GPH at 10. The calculator probably interpolates between the values. The 650 GPH at 13 ft. looks more like a Mag 18.

Nice find. Now Danner has two different flow chart ratings listed with different gph. :headwalls: