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In the picture below, the existing pipe that is used by the condensate pump runs across the red line in the figure (it does not connect exactly there but that is the idea)

That line is a clear pvc tubing, 0.2" diameter, old and turned brownish. I want to replace it.

I don't think it is properly sized and connected as the pump needs to push twice to send the water through it. (probably some is coming back) It was also explained that the purpose of a condensate pump is to pump the water up to a level and then a gravity should take it on further.

Since this existing pipe is traversing the ceiling to get to the bathroom there is no slope and I am considering installing a drain across the blue line you see in the picture.

What material and what size should I use ? 1.5" ABS ?

Is there anything smaller like 1" or 1/2" that can be used in this case?

enter image description here Update: here is the pump model -21786 in the picture below enter image description here

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  • you were editing my q :-)) while I was fixing that ..please see it now – MiniMe Aug 29 '20 at 20:41
  • "0.2" diameter" is pretty small. Approximately 3/16th that is very small. Is that correct? can you post a photo of the pump fitting? What is the condensate pump for? – Alaska Man Aug 29 '20 at 20:43
  • yeah I get that but what do I put there to solve the issue – MiniMe Aug 29 '20 at 20:44
  • There should be specs for the the unit that the pump is servicing. Have you tried finding the manual online? – Alaska Man Aug 29 '20 at 20:46
  • see the update please – MiniMe Aug 29 '20 at 21:01

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