Perfect solution for my ATO. Used as a backup to ensure I don't have siphoning from my ATO into my sump. Has worked great and super easy to install.
They were helpful and my order was exactly what we asked for.
I coiled some 1/4” nylon tube in my sump. I use the solenoid controled by my apex to open it when the temps get too high with the summer heat. Cold water brings temp down. Works awesome at a great price.
I added your 12v solenoid to add another layer of protection to my Neptune Apex ATO. A vast Marine products are always reliable.
Works as advertised.