External Pump Draw Question

grumpygils

Active Member
Can an external little giant pump pull water up about 18"? I need to mount one in a sump but can not put it on the same level all the sump. It has to be mounted right under the tank and draw from the sump and then be plumbed to two returns. It is rated for ~1250/hr.
Any experience out there?
mc
 

scsinet

Active Member
Short answer ... "maybe."
Long answer... in order to do this, there needs to be a means for the pump to not lose prime when the power fails. This is normally accomplished via a "foot valve" which is basically a check valve mounted at the bottom of the intake pipe. Then you'll also need a means to flood the pump chamber when putting the pump into service for the first time or after maintenance... such as a "T" fitting with a removable plug to remove and pour water in, etc.
Whether or not the pump can actually do it is tough to say... it might be able to, but regardless, you'll suffer a SEVERE drop in efficiency doing this. If this is what you must do, a submersible pump is the way to go. Or... what about elevating the sump and putting the pump under it?
 
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