Shower Head to Garden Hose Adaptor NPT 1/2 female to 3/4 male

thingiverse

*tested - work for a few minutes until it didn't, see bottom for details Attach a garden hose to your bathroom shower head. Can then use garden hose sprayers and high pressure nozzles with warm water from shower. Unscrew existing shower head, screw this back on it's place and then screw garden hose onto it. > Reroute hot water from the shower to outdoors if you needed to spray something with hot water. > Reroute water from shower to outdoor use in winter if you already winterized your outdoor pipes but still need to spray outside during winter. My outdoor plumbing runs off irrigation water thats off for 4 months of the year. > Use it to take a shower with, improvised hose type shower head using garden hose instead of pricey (and good looking) shower heads. If you use a lever type high pressure garden sprayer attachment this would work pretty good since you don't have to keep it squeezed down or there's those brass high pressure nozzles that you can tighten to adjust pressure or turn off all flow. Would probably be annoying if you used a squeeze type. > Turn your bathtub into a gigantic kitchen sink after large dinners. After Christmas/Thanksgiving maybe your sink just isn't deep enough for the large pots or you just don't have enough sink space period for the larger stuff. High pressure squeeze attachment would be good here. Put a mesh strainer/trap over drain to collect large hunks of food since there's no garbage disposal. > Fill large 5 gallon+ water coolers with cold, warm, or hot water from your shower since they don't fit in sink. >Green, water saving showers, if youre into that. Adding a squeeze or lever type high pressure nozzle makes it convenient to turn water on/off as you need it since you're no longer messing with temperature controls too. Wet yourself, then lather up without water running, then spray off the soap when you're done. >Bathe the kids. If kids are in tub, can use a high pressure attachment to wash soap out of their hair salon style with squeeze type high pressure nozzles. Highly convenient since you can get the water temp right then turn water on/off with nozzle attachment as you need it and not having to worry about dousing kids with cold or too hot water because you turned the water back on too low or too high temp. In the US, standard shower heads are 1/2 NPT male and standard outside faucets for garden hoses are 3/4 NPT female. So this is the opposite, 1/2 NPT female to screw onto the shower head, then 3/4 NPT male to screw the garden hose onto it. If you're using this for cleaning dishes or actually taking a shower, I recommend limiting the hose length as much as you can. Teflon tape highly recommended. PLA could probably benefit from annealing since dealing with hot water. Google "PLA Annealing" for latest info, but I like CNC Kitchen's explanations. https://www.cnckitchen.com/blog/better-performing-3d-prints-with-annealing-but-part-1-pla 3 stl files here. One is just an STL of a solid file of a standard brass fitting, and then two versions are a beefed up version that are more suitable for 3D printed plastic, including I narrowed the ID to 0.375" diameter . The UD (ultra deluxe) version has 1/8" holes to place 1/8" rods through to strengthen the part from snapping or delaminating. I'm using 1/8" drill bits and cutting them to size. If you heat the rods up first they're easier to push through (stove, flame, or soldering iron.) There's 4 holes that go diagonally, and 4 holes that go vertically. The vertical holes are blind and 3/4" deep. Future, I might make a bracket so you can hang hose and/or mount the hose's high pressure nozzle like you would with a store bought shower head with hose extension. I also might experiment with gasket making and upload some printable templates for cutting perfect gaskets. ***test update***: May be a few months before I spend more time on this since my immediate need was met. I installed the beefed up one (not the Ultra Deluxe.) It worked, until it didn't. About 6 minutes which was good enough for my need. I was scared to over tighten it because at some point that would cause the layers to split unnecessarily. So I was able to run it for about 6 minutes with hot water and a negligible/acceptable amount of water was leaking out and spraying back towards the wall, Based on this experience, I think the smaller adaptor will work just as well as the bigger two and I don't think the ultra deluxe version is necessary. I had a brass high pressure nozzle. If I closed the nozzle off completely (so no water flow) that created too much back pressure and the garden hose would fly off the front. Anyway, with that lesson learned I kept the nozzle open partially, moved the hose outside, went back in and turned the hot water on, went back out and started filling a container with hot water. After about 6 minutes I heard a pop from the house and water quit flowing, so I ran back in house and found that the hose had squirt off the adaptor. A small bit of water had apparently blown onto the ceiling and surrounding wall when that happened, not a big deal. The water was just spouting a steady stream of hot water right into the tub and hose was hanging out down there like you'd expect, so there wasn't a catastrophe or anything. Looks like when the PLA and aluminum hose fitting had both warmed up that the threads weren't good enough to hold it and the threads nearer the end hand bent upward under pressure which allowed the hose to shoot off. I think there are three solutions I think you can use to overcome this if you're going to try these. 1) add a horizontal offset in the slicer settings to thicken the piece a bit more. Since NPT threads are tapered (the threads wrap around a cone shape end) you should still be able to thread something into or onto them and that thing should be able to compress threads on your adaptor to give them a stronger shape and maximal bite. Maybe 1%? 2.) In initial installation, take a couple extra minutes to warm it up, then tighten some more. I hand tightened the adaptor on to the shower head pipe. The adaptor is 2" across the flats and with finger grooves to help get leverage, but then I used a strap wrench to cinch it down another couple turns. I used a wrench to tighten the garden hose onto the adaptor until I didn't want to risk any more tightening. At that point I left well enough alone because I didn't want to risk breaking the part with delamination. After the 6 minute run and the hose blew off I tried to see if I could reattach the hose and found out that the threads were too damaged on the male side for the garden hose. But... I did notice it was super easy to hand tighten the adaptor a few turns more onto the shower head even though it was super hard with a wrench to tighten it as far as I had already got before. The lesson here is that I think if you attach everything and run it with scalding hot water for a minute or two, you can hand tighten even more than I was able to do with the use of a strap wrench... so you probably should. Average shower gets up to 140(f) degrees which is 60(c) which is around the temperature that PLA starts to be malleable. So, I think I would have been able to really smoosh those now soft threads all the way in giving it a lot stronger grip. 3.) Should try annealing the part. The annealing process makes PLA many times stronger under heated applications. Just beware that annealing will expand the part a bit in the z direction and it will shrink it in the x/y directions, so you'll need to have a good estimate of how much your PLA contracts/expands and adjust your slicer settings for that.