I bought this thinking it would work on my Rinnai Heater, but there wasnt really any great pictures to see if it would work on mine...Once I got the product tried to install it, There was no connector for my heater (Due to the age). So it didn't work for my application, however if you have a newer Rinnai heater this might work for you.

Product didn't work and needs to be returned. Wasted a bunch of time on this and need to start over.