I have just seen the latest Model Engineers’ Workshop on Readly. It looks an excellent mix of articles.
The drip feed article will be very useful to many readers. When I set up my drip feed system many years ago I used the same click together pipe.
To avoid keep having to adjust the drip feed, I set it to the flow I wanted and to turn it of I used two on off taps in sequence. One was set to the required flow and the other was used to turn the flow on and off.p