Custom bog waterfall feed


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Hey Everyone- I’m toying with the idea of making my own custom bog using EDPM instead of a plastic basin. It’s going to have 2 outlets for 2 18” waterfalls and I thought perhaps it’d be easier to make a box out of pressure treated 2x12’s and making my own weirs over my rocks. I was wondering if anyone connected a hose from their pump to EDPM with rubber washers before and if they have any tips for anything I said above. Thanks!
 
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We didn't connect a pump, but we do have our sump line coming into our rain exchange through the liner. We used a bulk head fitting and it worked fine.

Let me also add that you don't have to plumb through the liner if you don't want to. Our line goes over the side and down to the bottom of the bog.
 

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My bog is exactly what you are planning. 2'x11' lined with EPDM. Agree with Lisak1 on not needing to cut thru liner. Just run your supply line over the edge. Bog is on left side.
 
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I like your tiered look, I’m going to have 3 hoses going up into it for 3 pumps for circulation so I’d rather come into the bottom for aesthetics. The bulkhead connector from @Lisak1 is exactly what I’m going to do with all 3 hoses to keep them hidden in the rocks
 

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Rainy day today so did some prep on my bog. This will be on top of my hill to feed my double waterfall. Still have to build 2 waterfall weirs but this is the start. Can’t wait to get it in the spring, line it and plant it
 

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Rainy day today so did some prep on my bog. This will be on top of my hill to feed my double waterfall. Still have to build 2 waterfall weirs but this is the start. Can’t wait to get it in the spring, line it and plant it
Placing the bulked fitting at the bottom is not the best place to cut and make a seal in the liner . the bulkeds want to be in an area where the rubber is flat and not so much at a bend/corner. two 22.5 degree elbows will get you up far enough from the bottom and i say 22.5 and not 45 or 90's as the lessor the angle the less head pressure. 45's will work as will a STREET 90 which is half as sharp a turn as a standard 90. they just add head pressure which lessons the amount of water from the pumP.

I'm confused as to why three boxes and not just one larger bog.
 
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Along with the bulked i would place a bead of pl s-30 around the cut to help insure the casket stops the water from leaking down the road.

Are you planing on making the connection point deep enough for koi or golfish to swim from one pod to the other
 

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