Ammonite
Well-known member
I am following this thread with interest as I recently had two 3/4" valves fail in this manner after two seasons afloat (circa 13 or 14 months). In my case the handles came away completely and the drive on the end of the spindles had disintegrated through, what to my untrained eye, looked like dezincification. According to the datasheet the spindles, ball and body were all DZR. I returned them to the supplier who sent them onto the manufacturer (although I was informed the actual manufacture is outsourced to a 3rd party) but was told there was not enough material for testing the composition. Just to be clear I do not know why the valves failed and cannot rule out environmental factors. I installed two other 3/4" valves from the same supplier at the same time in different locations and these appear to be fine, whereas the two that failed (one for a deck drain, and one for a combined sink/shower drain) developed excess play in the handles in the first season afloat. None of the valves are bonded.