I wanted to connect the drain line from a dehumidifier pump (using 1/4" OD tubing) to a bathroom drain (using standard 1-1/4" fittings). The bottom of the existing sink drain connects to a 1-1/4" flanged tailpiece.
This seems like a reasonable thing to do?
If your drain is 1-1/2", there are plenty of options for doing this -- starting at around $5 if you don't mind using a saddle fitting. These are used by under-sink reverse osmosis water filter systems, and 1-1/2" tees are used by dishwashers.
My solution was:
- Replace the tailpiece with a McMaster Carr 4" Tailpiece. This is the shortest 1-1/4" flanged tailpiece I could find anywhere.
- Slip-fit the tailpiece into an Oatey 1-1/4 8" Tailpiece with 7/8" Branch Tee. I couldn't find a flanged 1-1/4 tee or wye anywhere.
- This mess brings the bottom of the drain into The Dark Realm, so replace the p-trap with a SimpleDrain Flexible P-Trap.
- Connect the 7/8" Tee to a Drain Line Adapter to reduce it to 1/4". This involves cutting off 90% of the product and throwing it away.
Total cost is:
Surely this is a dumb thing? I installed two of these setups.