In message , Fredxx
writes
On 10/02/2021 10:54, Tim Lamb wrote:
I take it the reason the rubber/plastic bulb/hose on my anti-freeze
tester disintegrates between Winters is the alcohol? in the coolant?
Might help if the manufacturers suggested rinsing with fresh water
after use!

Never used one. I prefer to add a litre of antifreeze every year of two
depending on the work I've done on the car. But then I add it mainly
for corrosion protection.

Interesting feature on some 70's/80's Ford tractor engines.. coolant
cavitation causing erosion and penetration of cylinders! Not helped by
some of the coolant characteristics.

--
Tim Lamb