Product review (3 stars): Amazon, To Big To Bail On?
This product is not an Aprilaire original part.  The orfice insert is yellow not blue meaning it is a 3/64th not a 3/32nd as needed for Model 760.  This had been mentioned before here in other reviews but I thought for some reason, maybe just out of sheer desperation, I ordered it anyways. Very disappointed in Amazon on this purchase.  None the less it did install easily, the correct humidity by my gauge is still being maintained and the valve itself is functioning properly.  However, if I had not been so desperate to get this unit functioning again I would have just sent it back.  I guess to encourage Prime Memberships it seems Amazon now just takes their sweet time about deliveries too!