Finally found the photos and source for the Nylon snap in 3/4" T-stat seals I used to increase sealing of the T-stat when it closes on the crossover pipe. See attached, just a little more insurance, this was a suggestion by Marek from the UK. Best, JW

 

Doctor, just a small question: Can the nylon withstand the hot glycol mix it is immersed in alright?
Greg

 

Good question, I don't think so, it takes a good flame just to soften them....Best, JW.
Remember these are electrical inserts for electrical wiring.
Boiling hot water doesn't seem to affect them, tried it while calibrating an Idle Aire valve for a client. Didn't have any antifreeze around the house, (all of those liquids are verbotten in the wifes house) only Single Malt Scotch in the Library.......the dishwasher is my secret parts cleaner.