I need to change out the fitting under my kitchen sink for the dishwasher drain hose, which was 1/2" but is now 3/4"

Looks like the PVC is standard 1 and 1/2" so I need a fitting/adapter/whatever that's 1.5" x. 75" and I need to get it PDQ. I looked on Home Depot's site but there are so many options, I can't seem to find it.

Can anyone find this fitting on HD's site? (and hopefully,it will be in stock for me locally)

Also, what am I using to seal the connection in the 1.5" pipe? Plain old white plumber's tape, or what?

I imagine I can unscrew this with just channel locks, right?

I can find a plumbing supply store around here if I need to but I'm hoping HD has what I need. Thanks

The dark gray piece will unscrew, but the white PVC part it’s screwed into is glued to the elbow. The whole trap appears to be glued (solvent welded really), so you really can’t just replace the female thread part by itself.

Otherwise, I think this is the part you are looking for: 1-1/2 in. x 3/4 in. PVC Schedule 40-Reducer Bushing SPG X FPT.

Just get an adapter to go from 3/4 to 1/2 and hook it to the same spot. Leave the pvc alone.

So, the adapter would be 3/4 to 1/2 with the 1/2 end being female threaded. The 3/4 end would be unthreaded or it doesn't matter, correct? Where do I find that part, and can I seal the connection with plumber's tape, or what?

Here's a link to HD's web site with the reducer that I think should work for you.
Try to grab an employee and he should be able to get you exactly what you need.

Depending on the type of fitting on the end of the 3/4 hose, you may have to glue a short stub of 3/4 PVC pipe to the reducer so that the clamp has something to attach to. (you may need to pickup some PVC glue and cleaner while there).

https://www.homedepot.com/p/Ch...HD/203825580#overlay

I would also recommend that you hold the octagonal fitting when loosening and tightening the fittings, you'd don't want to tweak the glued parts of the trap.

ETA: Good luck and let's hope that you get it done with only one trip for supplies.

Beautiful

Thanks to each of you

When I install the new reducer, does it require a sealant? PVC cement or plumber's tape, something like that? This is merely a drain, and not high pressure, but it does appear there's some sort of sealant on the part that's in there now.

Always used some kind of tape or pipe dope unless it’s a glued fitting.

OK, so what, specifically?

I would use liquid teflon pipe sealant for the joint. Loctite is one brand but there should be options at HD.

quote:

Originally posted by bigwagon:
I would use liquid teflon pipe sealant for the joint. Loctite is one brand but there should be options at HD.

Yes. Oatey sealant.

The container will last forever.
Just stir it if the oil separates after months/years of it sitting on a shelf if you ever need it again.

This will work, yes?

https://www.homedepot.com/p/Oa...und-154202/100204007

Any prep required to the threads after I remove the old part?

Are the parts you are using PVC?

The product description says that is for metal pipes,

Pro Dope is for use with metal threaded pipes. It is suitable for use in temperatures ranging from 0°F to 350°F and can withstand 250 PSI from liquids and 200 PSI for air and steam.


Rectorseal is at HD and for metal and pvc.

https://www.homedepot.com/p/Re...PTFE-31630/203490732

Yes, PVC

OK, Rector it is. Thank you