Cheap coolant alarms psssffft ;(

Badger wrote: I have just had a look and found out what low level device you had fitted (it really and truly is low level)

We now have a new law that states "Never drill holes in the header tank of an already under engineered overstretched cooling system, plus trying to get a mechanical seal between a self tapper and plastic that will most likely leak under pressure anyway"

This system can only create problems not solve them.

I've ordered a float valve my last DIY one was good like Davids I just left it on the car when flogged it

Still a worthwhile exercise Ben. :yesnod: Now we know that there is a minimum price for an acceptable low level alarm kit!