Grohe 46138000 1/2 in. Quick Coupling, one-size

Bought a new Grohe kitchen faucet and the flow was so limited the sprayer would not work and it took waaaaay too long to even fill a pot with water. You couldnt even rinse the sink out the pressure was so weak. Did some research on the flow restrictor for our model and bought this coupling to replace the red coupling that restricts flow to 1.75 gpm (I think - might be 1.5?) Problem solved! The pressure is actually so strong you have to get used not turning it on all the way. You have to go under the sink to replace it because it is on the end of the hose where it connects to the body of the faucet, not up at the handle end. Once you get under there and find it, it takes about 30 seconds to replace it. It is kind of irritating that it costs what it costs since it is just a piece of plastic tubing with one threaded end and one push/pull snap connector on the other. But it saved me from years of frustration with a ridiculously low water flow.

Shipment arrived as promised

This was probably the easiest plumbing project I have done. Removal and replacement was effortless.

Grohe direct charges about the same $30 for this little part - so its not Amazons fault

Easy to install. I dont have much of experience in the plumbing department, but this was easy to replace. Replaced about a year ago, have not had any issues since.

I probably did not need to replace the original but it was 18 years old and since I was replacing the hose I felt that it was no big deal, works seemlessly with new hose

I was doing the dishes the other night using our 8-year-old Ladyluxe faucet when I noticed my foot was wet. I looked down to find a small torrent of water pouring out from under the cabinet door. I thought the drain had come loose or the disposal was leaking. But, it was this plastic part at the base of the faucet. The threaded, black side split and a thin stream of water was shooting all over the cabinet interior. The part was easy to unscrew and identify as Grohe part 46 315 but I found this part, Grohe 46 138 that looked the same and was eligible for Amazon Prime. I took a chance and ordered the part and installed it without a hitch. It seems that 46 315 and 46 138 are equivalent replacements for each other. I did notice a little difference internally; the shape of the internal screen is a cone shape where the newer 48 138 is flat. This might just be an update to all their parts, though. In the end, the 48 138 fit and works. On the subject of the actual Grohe part, I seems this part is a common failure point in this design. It didnt take long to find talk on discussion boards about this part failing after 5 years. Im going to buy a spare and leave it in the cabinet so I dont go through this in another 5-8 years. I doubt Id buy another Grohe faucet after this experience, though.

Installed without difficulty . Thank you!!

This is a direct replacement coupling for my Grohe kitchen faucet. No problem since installation.

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