Waterproof 

4 pin plug in circuit board

for Clack water system WS1 circuit boards pre 2017

Please make sure your circuit board has  12v AC or just AC printed next to the 4 prong plug. 

This will not work with the newer 15v DC circuit boards

The one pictured is the exact one you will receive. 

All transformers are checked with meter and on a clack circuit board before shipping. 

Ships same day