Combining hand pump & indoor shallow well jet pump

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Hey guys, does it makes a big difference to use 1 1/2" downpipe instead of a 2" downpipe with a shallow well? The water is around 25'. Pump and tank are in the house.

I have a 3" casing outside and I'm hoping to try to fit 1 1/2" (to the pump inside) and then also fit a 1" downpipe that could go up to a hand pump straight above on the casing cap.

I thought about just extending a 2in with a tee to accommodate the hand pump, but I imagine that could mess with the inside pump's prime.... I also imagine it would be hard to winterize.

Has anyone done this? I'm just trying to use the inside pump to power a sprinkler system. Would decreasing suction pipe size to 1 1/2" still be sufficient for irrigation?

Here's a link to my other thread as I try to revive the well...
https://terrylove.com/forums/index.php?threads/need-help-reviving-an-old-well.83004/
 

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Hey guys, does it makes a big difference to use 1 1/2" downpipe instead of a 2" downpipe with a shallow well? The water is around 25'. Pump and tank are in the house.
If you are pulling the down pipe, I would put a foot valve on that. Then you should be able to be rid of the check valve inside.
 
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