Mrs R’s car lost a wheel trim, new trims ordered and fitted. Year goes by, tyre loses air – slowly, drag home brew tyre pump to site. Won’t inflate because 90 degree fitting gets in the way of new wheel trim.
Buy push-on tyre inflator handle, nice red one. Turn on, pressure goes through roof. Ponder, order 1/4 BSP adjustable safety valve, rummage in scrap box, make tee piece – 6mm tubing JB Welded into 22mm brass bar drilled and tapped 1/4 BSP. Nice one, set to 40 psi.
Proper mechanical engineers can stop reading now. Engage brain and study WEB. Red handled push-on inflators are closed till you push on but there are Black handled push-on inflators that are open. Either type will work – same price. Had I engaged brain instead of jumping in with a ‘solution’ I could have saved the (small) cost of a safety valve and the pleasure of making a T piece. But I didn’t know push-on inflators came in two sorts…. Time spent in reconnaissance is seldom wasted.
None of this bother if the wheel trim had not fallen off.