Well, rather than just telling someone who appears to me to be a bit new to ideas like this that it’s risky with no reward, and that they don’t understand what’s involved with this, why not offer a less risky alternative, along with explaining what’s involved?
I’ve done a lot of drip acclimating with air line tubing, with a 4’ drop wide open runs about 3gph. Seeing as a proper drip acclimation requires doubling the shipping water, which isn’t much, every hour for 3 hours this is way to fast. I’m cheap; tie knots, use clips & so on. It still isn’t a walk away long term thing, a half hour once it’s set sure, no way for 3 hours.
Air line, as mentioned, is small bore, just begging to be plugged by the tiniest bit of debris. The valve you mentioned would be the place it plugs, as this will have the smallest passage in the system. Look into setting up a self leveling siphon overflow, for a few dollars of pvc parts you’ll have a drain that is ½” diameter, and will be much more difficult to plug than air line tubing. If your water feed from the bucket runs slower or faster it won’t matter, this device will maintain a water level in your tank. I’d run the feed bucket line down to the bottom of the tank opposite of the overflow.
If you want to ramp it up a bit hardware wise, and cost wise look into setting up a drip emitter from your water supply; 2 GPH PC Drip Emitter, Color Green
Install a saddle valve on your water pipe, just like what’s used to install the supply for the icemaker on a fridge. Any cheap carbon block filter after the emitter will work on a flow rate that low, removing chlorine, chloramines, as well as other contaminants. This will work with the previously mentioned overflow, a step beyond that would be drilling the tank for an overflow. Run the overflow to a drain, depending on your tank & emitter size you could walk away from this for a few hours to most of the day.
These ideas are just smaller scale hardware setups of what is done in larger private & commercial fishrooms. This will eliminate many hours of hands on water changes, but as mentioned there’s still lots of other maintenance that requires a hands on approach.