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Old 07-12-2008, 11:32 AM   #1
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Need pump setup help


Ive bought a liberty water pump for my darkroom sink. Im trying to set it up and I have a question. Where the pvc goes into the pump it reads 1 1/2" inlet. SO I tried to put a 1 1/2 inch pvc pipe in the hole and it is too big. Am I missing something? What do I need? Any advice appreciated. I have a check valve that I bought and also have it vented properly, now I just need advice on how to atatch the inlet and outlet PVC.

This is a pic of the pump that another photographer sent me of his set up to help with my setting it up.



Last edited by pesphoto; 07-12-2008 at 12:08 PM.
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Old 07-12-2008, 02:44 PM   #2
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Need pump setup help


I could be wrong, but i believe DWV PVC and water PVC are different diameters. . . .

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Old 07-12-2008, 02:45 PM   #3
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Need pump setup help


Is the hole threaded? if it is double check the fitting size. It should be marded on it.
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Old 07-12-2008, 10:46 PM   #4
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Need pump setup help


DWV and Pressure pipe are the same OD (outer diameter). "Tubular" pipe, such as slip joint traps and tail pieces are made of, is a different diameter. But if the inlet is threaded, you will need an 1 1/2" male adapter to screw in and it will be a little smaller than the pipe itself, due to the threads being cut (actually molded with most plastic) into the pipe. Liberty's website shows an 1 1/2" model and a 2" model but nothing smaller.

The picture looks like 1 1/2". It also shows both an "S-trap" and a double trap, neither of which are legal or necessary. The trap at the bottom is all you need.
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