My water temp sensor is was not installed by any of my subs and it looks easy enough. The instructions said to put it at the pump inlet but I'm not sure I can make it reach. The pool guy (who pointed out the dangling sensor) said it was fine to put it on the pump outlet.
For temps reading I figured that was OK/fine... and I was about to drill a hole. But then I got to thinking and wondering if those things are designed for pressure or if they are better under vacuum. Eg, is it more prone to leak on the pump outlet?
... but then I figure if these things are OK on the outlet of a solar array there could be comparable pressures over there?
Any advice on these? I hate putting holes in plumbing that's not leaking...