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You may be trying to do something that could lead to a major failure by overloading the roof structure with the weight of the standing water if the pump does not operate properly AND violates the Building Code by allowing too much standing water to accumulate on the roof. There are many circumstances where a pump could fail, but is even more dangerous with ...


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Is your check valve upside down? or is your ceiling concrete and have a wet spot? I typically use a 2" pvc union. Is that check valve spring operated or just a gravity flap? The union allows disconnect without being a clamp based fitting. Don't put any kind of sealing compound on the furnco - rubber doesn't like chemicals.


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I repaired a friend's sump and discovered the value of the "check valve" because his system did not have one lol. If it's not sealing though you're sure you have more than tightened the clamp, then the size different between the hoses is too great. Might need a reducer/spacer to go between the backflow valve and the PVC pipe. BUT... it looks ...


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Standard septic tracing dyes are non-toxic (important becasue you are dumping them into wherever your sump discharges) and typically fluorescent and fairly concentrated. Green and red are common. Blue seems to be less common, but available. In your case it likely does not matter, just pick a color, put it in, and go hunting - also see if it "comes back&...


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