We just got a new dishwasher, and I cannot figure out how to connect the drain hose from the dishwasher to the drain hose extension coming out of our floor.
How can I connect the two hoses shown in the attached picture?
The fitting from the new washer appears to be 1/2" female that would normally attach to the 1/2" barb connection under the sink. The elbow on your extension tube looks like 1/2" too. You should look for a 1'2" double barb nipple and two hose claps similar to the picture below from Amazon. A PVC double barb nipple would work too with hose clamps
It appears you need a short piece of solid pipe and 2 clamps. Possibly 3/4 CPVC.or any size that fits the rubber ends snug. Then clamp.