Dry well pump selection and setup suggestions

berk21

0
Jun 3, 2011
8
Hi all.

When our vinyl pool was dug a couple years ago we hit water in the deep end. Not terrible, but we elected to put in a dry well just to be safe, but we never attached a pump to it. When opening the pool a couple days ago, we had some shallow end WALL liner float. I suspect this is due to the 4 inches plus of rain that we had a couple days before. Water was running like a fire hose out of our french drains. We've not had a problem before and we're lucky that the liner settled back into place nicely.

I'd like to get a pump to have on hand here to help prevent liner float again. I'm looking for suggestions as I am most definitely not a pump expert.

The pool is freeform, with a 28x50 footprint. Deep end is 8 feet, well is I believe 1-2 feet of gravel below the deep end. There's a flexible pvc pipe that comes out of the gravel and runs to the pool equipment. In all it's about a 10 foot rise, and I would guess that the total length of the pipe is around 25 feet assuming they ran it relatively straight and that it isn't on much of a vertical angle. The pipe is capped with 2 pieces. 1 is a fitting that is glued on that is female threaded. That is capped with a a Hayward SP-1022-C plug, which from what I can tell appears to be a 1 1/2 inch male threaded plug.

In order to be able to pump out the deep end on demand, I think I will only need:

1) A pump - I'm looking for a low budget pump, but one that will work, not hurt the pool by sucking the water out too quickly, and preferably not kill me by blowing up.
What horsepower do I need? Am I looking for a "drywell pump?" Would a used AGP pump work given the right specs if I prime the drain? Hoping to stay well under $200. I've seen many pumps on ebay etc for $99-$130. No idea if they're good enough.

2) Fittings and hoses/pipes - I'll need fittings to connect to the 1 1/2 inch female screw connector on the pipe to the pump itself. I envision a fitting to convert that cap to a hose that will connect to the pump. I'll also need a waste hose for the exiting water from the pump. I'd appreciate suggestions here too based on the pump(s) that are suggested.


And a bit off topic: I would love if this pump could also be used come closing time to either blow out or suck out the water from the skimmer and return lines. I've used a shop vac in the past for this with very limited success but have been ok pairing this with antifreeze. If I found a used "mightvac" could that be used as a drywell pump? And are there other suggestions to mightyvac?

Thanks so much! Love this forum.
 
Thanks Sargent. I know for sure that there's no pump at the bottom. It's just a perforated pipe in gravel. There's no electric to it, no switches, just basic. I have a MightVac 3/4 hp pump now (for line blow out). I could fill the pipe that comes to the surface using a hose, so prime wouldn't be an issue. THe question is now if a 3/4 mightvac would be too much, too fast to pump the water out.
 
I'm sure such a pump is made but most of us are familiar with an 8" drywell pipe that comes vertically from the ground. A submersible pump is lowered into it when necessary and the water is pushed out the top. Pumps love to push but they don't like to pull.

You need a pump that will pull that water to the surface. That type of pump is not something many of us are familiar with but I think you might get some sticker shock as you search.

I don't think you will be able to prime by filling the pipe because that water will simply drain back down to the ground water before you can turn on pump.
 
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