Maybe you could rig up something that slowly fills a bucket and mount the bucket so that it loses balance and dumps all at once when nearly full. The bucket full of water would flow through a pipe that leads to the base of your geyser.
Bad thermostat in the icemaker short cycling and starts the harvest before the cubes are fully developed, this usually makes a mess as it dumps 1/2 made cubes and some water.
You could see the lamps flicker as they turned :-) Bottom-bracket mounted dynamos are pretty good as they don't scrub like the sidewall-driven ones can, but they can be prone to slipping and/or rapid wear because the back tyre dumps loads of crap on them.
I'm sure its pretty obvious, but just in case, when the air temperature drops the air can hold less water, and dumps it on any convenient surface that is colder.
I presently own a portable floor standing dehumidifier that works fine but it dumps hot air into the family room while it's dehumidifying & it's bucket has to be manually dumped when full.
Someone dumps cat in neighborhood. Figure because cat was spraying (well yeahhhh, unneutered male). Cat very friendly. Great attitude but stinks bad. So I take it and get neutered. Of course stink goes away and we have a new one critter cleanup crew. He rids 4 yards of every mole.
In this case the 1.5kW it consumes is unwanted and dumps as waste heat.
They certainly don't test using real driving conditions such as on road that aren't 100% straight woithout hills or dumps or stops at lights etc... Wouldn;t suprise me if they drove them in a vacumm container in zero G simulation, I just hope I've not just given them a new idea ;-)
Actually, the only one on the bath is the waste (which costs 110 dumps), the taps are on pillars at the side of the bath.
You can carry a lot of rocks on a trailer pulled with an ATV, and with the tilt trailer, it dumps instantly with the turn of a rod. Steve