little giant pump ???

[joncat24]

would a little giant 4md pump work external to sump, if I plumbed it with a line in the sump going to a skimmer.
would it siphon out of the sump this way. I want to use it but I am not able to drill the sump...anybody know???

 

[joncat24]

somebody has to know.....
help please....

 

[DarG]

Yes, but there could be some problems. You would have to start a siphon to get the water flowing to the pumps volute (area where the pumps impeller is located) first in order to get it started. But once that was taken care of it would work fine. The only possible problem is that if the power is down, the water would have to remain in the volute of the pump so that it could start up again when power is returned. So as long as the water didnt completely empty out of the skimmer back through the input, the pump would always have water in it's volute and would start up again. If for whatever reason in your set-up all the water did empty back through the pump when the power was down, you could add an ant-siphon valve after the pumps output to prevent all the water from draining back through the pump and leaving the volute dry.

That was a long way to say the the pump would NOT self prime.

BTW, why cant you drill your sump for a bulkhead fitting? Is it glass?

 

[joncat24]

yes it is glass and it is running right now so I dont want to chance breaking it and ending up with 40 gallons of water on the floor.
What I was thinking is, kinda like a closed loop. Have a tee at the top with a cap that I can fill the the lines with water and then turn the pump on. I also will install a check valve so the water cant drain backwards in to the sump. I just wasnt sure if the little giant would pull this way or not. I have never used these pumps before.
thanks for your reply

 

[DarG]

Anyway, they will work that way. I've done it before, years ago. I used a LG for circulation by drawing from the tank with a PVC u - tube and retruning to the tank in the same way. Good luck.