pincorrect
Member
This isn't a huge project, but it may help someone in the same situation. Our kitchen sink has a Grohe spray faucet. Totally useless for hooking up a chiller or bottle washer. (I really gotta get a utility sink!)
I finally put something together that works (after trying a couple really ridiculous solutions). The detachable spray head terminates in plastic piece consisting of a coarse (no doubt metric) thread (closest to the spray head) followed by a 1" (er 25mm) pipe into which the spray hose is inserted. An o-ring on the hose makes that water-tight, and a ferrule (I think that's the right term) on the end of the hose screws on to the thread to hold the whole thing together. While the thread is likely metric, it is pretty close to 1/2" MIP.
So I got a 1/2" MIP x 1/2 MIP nipple, a short piece of 1/2" copper pipe, and a 1/2" sweat union (whose only purpose is to beef up the end of the adapter I made). The 1/2" pipe wouldn't quite fit into the nipple, but did after I reamed one end of the nipple out a little with my Dremel. Then I soldered a 1" piece of the pipe one end of the nipple (leaving 1/2" exposed), soldered the union onto that and soldered a 1/2" piece of pipe into the other end of the union (flush to the top of it). (Use lead-free solder.)
Now I needed to ream the end of this union (with the little piece of pipe fitted into it) out a little. I happened to have a 15mm drill bit and a drill press, so that's what I used. If I didn't have that, I would have probably used the Dremel again. This is why I soldered the union on the end of my fitting. It gave me a little more material to work with. If I just soldered a 1 1/2" length of pipe into the nipple, then reamed that out, I was afraid the end of the pipe would be too thin.
After cleaning it all up, I had a fitting that would just fit on the end of the spray hose, and could be secured with the ferrule. This gave me a 1/2" MIP thread to hook up to things. I happened to have a spare garden hose faucet with a 1/2" FIP thread, so I just used that. A 1/2" FIP x 1/2" FIP adapter, plus a 1/2" MIP to Male Garden Hose Thread adapter would also work.
If it's helpful to anyone, I'll go take a few pictures in case my descriptions are unclear. If you have a similar situation, I hope this may help!
I finally put something together that works (after trying a couple really ridiculous solutions). The detachable spray head terminates in plastic piece consisting of a coarse (no doubt metric) thread (closest to the spray head) followed by a 1" (er 25mm) pipe into which the spray hose is inserted. An o-ring on the hose makes that water-tight, and a ferrule (I think that's the right term) on the end of the hose screws on to the thread to hold the whole thing together. While the thread is likely metric, it is pretty close to 1/2" MIP.
So I got a 1/2" MIP x 1/2 MIP nipple, a short piece of 1/2" copper pipe, and a 1/2" sweat union (whose only purpose is to beef up the end of the adapter I made). The 1/2" pipe wouldn't quite fit into the nipple, but did after I reamed one end of the nipple out a little with my Dremel. Then I soldered a 1" piece of the pipe one end of the nipple (leaving 1/2" exposed), soldered the union onto that and soldered a 1/2" piece of pipe into the other end of the union (flush to the top of it). (Use lead-free solder.)
Now I needed to ream the end of this union (with the little piece of pipe fitted into it) out a little. I happened to have a 15mm drill bit and a drill press, so that's what I used. If I didn't have that, I would have probably used the Dremel again. This is why I soldered the union on the end of my fitting. It gave me a little more material to work with. If I just soldered a 1 1/2" length of pipe into the nipple, then reamed that out, I was afraid the end of the pipe would be too thin.
After cleaning it all up, I had a fitting that would just fit on the end of the spray hose, and could be secured with the ferrule. This gave me a 1/2" MIP thread to hook up to things. I happened to have a spare garden hose faucet with a 1/2" FIP thread, so I just used that. A 1/2" FIP x 1/2" FIP adapter, plus a 1/2" MIP to Male Garden Hose Thread adapter would also work.
If it's helpful to anyone, I'll go take a few pictures in case my descriptions are unclear. If you have a similar situation, I hope this may help!