I've been having an issue with my under-sink water filtration system. There's a leak on the left side of one of the fittings that I can feel when I touch the threads, but it doesn't actually drip. I've checked to ensure it's not cross-threaded and it seems to be tightened properly. I can't find the part I need anywhere online. Can anyone guide me to where I might find this part? For context, the cold water is coming up from the basement, with the left line leading to the sink faucet, a red line taking cold water to the filtration system in the basement, and another line going to the dishwasher from the back. [Here's a picture marking the wet area.](https://imgur.com/a/YHrTs7Y)
2 Answers
It sounds like you're dealing with a 3/8 braided polymer supply line. Home Depot usually stocks those, so you might want to check there! Just to clarify, the water you're feeling is near the metal washer-type connector behind the threads, right?
Just a heads up, it's a bit unusual for a Bosch 800 series to need cold water for the dishwasher, but if that's what the manufacturer suggests, then go with it! Is there any chance the leak could be related to the connection under the hose crimp?
I checked that area, but the leak seems to be more near the washer behind the threads.
Yes, that's the spot! It's right behind the threads on the plastic T.