pump question

[LawnTodd]

Whats the difference between the Sequence 5800sw and the Sequence Hammerhead? They seem to have the same specs but the 5800sw cost more. Which one is quieter? I was going to buy a Hammerhead but a friend of mine is selling a 5800sw. Any help would be appreciated.
LT

 

[Julio]

if i am not mistaken one is is for pressure applications, the 5800

 

[cmhollis]

Julio is correct. If you compare this pump curve for the hammerhead:

http://www.marinedepot.com/aquarium...merhead_manta_ray_tiger_shark_information.asp

with this curve for the 5800:

http://www.marinedepot.com/aquarium_pumps_mdm_sequence_information.asp

You can see that the 5800 has much greater flow as the discharge head increases.

HTH,

Mike

EDIT: Actually after looking at the curves, they look almost identical.