[jgordon]

Ouch.  Surprised they're stuck as I believe all the xintex sensors had plastic threads.  I would try to avoid cutting them out, perhaps using a pipe wrench on them as the hex on them is 53mm and 2¼" is too big.

Did you buy new xintex sensors?  I didn't think they were made anymore.  Maybe you realize, but in case you don't, if you bought new 'non-xintex' sensors then you'll need a new gauge as well.

Thank you for the response.  I tried the correct socket but it was a 12 point and just round the corners.  I have broken off the top of the sensor off but haven’t gone further.  It looks like cutting may be my only option.  This is all on the waste tank with great access.  The water tank will really be a nightmare.
Thanks for the heads up on needed the new sensor.  Hopefully I can use the wiring.
Joe