prezes Does it need any ptfe/sealant when refitting ?
Nope, just make sure the end is cut nice and square…push fully onto the fitting and then slid the ring up and tighten it well…that pressure forms the seal. I love PTFE tubing, so easy. Leave a little extra length as it’s handy if you want to move something, or need to trim some off an end! Put a loop in if you want.
I would buy 3m of it…doesn’t take up any real space.
Oh check there wasn’t a blockage to the solenoid, not allowing a route out for water expansion as it’s unusual for the stuff to split.