3/8 polyethylene tube to kitchen drain


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Old 06-20-16, 05:57 PM
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3/8 polyethylene tube to kitchen drain

I have a condensate pump collecting droplets that I want to connect to the kitchen plumbing p trap.
Is there anything to connect a 3/8 tube under the sink? I've seen dishwasher T s but they are 1/2"
 
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Old 06-21-16, 06:46 AM
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You will probably need to use the dishwasher adapter and possibly an air gap. You may need to buy a short piece of 1/2" tubing then find an adapter to go from 1/2" to 3/8".
 
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Old 06-21-16, 07:02 AM
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I would use a reverse osmosis drain clamp. The inlet is 3/8" tube.
The clamps are available to fit 1-1/2" slip tube pipes or 1-1/2" ABS/PVC.

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I have never seen these at any hardware store, I would call someplace like culligan or other water filtering company and see if they can sell you one.
 
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Old 06-21-16, 07:16 AM
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Don't seem to be many adapters like this. Could I just heat the tube and fit onto a 1.5 x 1.5 x 0.5 T under sink?
 
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Old 06-21-16, 08:26 PM
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like this? but it's 0.5 inch
ABS Wye Dishwasher Adapter | RONA
 
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Old 06-22-16, 05:36 AM
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If you can drill a hole in the pipe and tap it, you can use an elbow like this:

John Guest 3/8 in. x 3/8 in. Polypropylene 90-Degree Push-to-Connect Male Fixed Elbow (10-Pack)-PP481223W - The Home Depot

This fitting is available in the straight version also.
 
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Old 06-22-16, 07:32 AM
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To seal it off to make sure no sink water comes down, can I just use silicone or do you mean wrap ptfe and dope around the thread?
 
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Old 06-22-16, 10:34 AM
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The 3/8" tubing will probably slip tightly over a 1/8" pipe nipple. " rubber auto vacuum hose will probably slip tightly over a 3/8" galvanized pipe nipple. Connect the two pipe nipples together with a reducer coupling and you have an adapter to your " sink dish washer connection. Guessing a bit on size so take a piece of " and 3/8" hose/tubing to the hardware store and test before buying. Use worm gear hose clamps when connecting.
 
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Old 06-22-16, 03:44 PM
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can I just use silicone or do you mean wrap ptfe and dope around the thread?
Yes, I mean tap the hole and use both paste and tape, thread the fitting in. It doesn't need to be real tight, snug it up just past hand tight, like 1/8 turn. The water isn't under pressure.
You can trust the push in connector end, trim the tube back with a square cut and insert the tube into the fitting full depth.
 
 

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