You will need this adapter for the K1.
https://donnyfl.com/products/huben-k1-1-2-x-20-adapter-a9?_pos=1&_sid=a1d81f405&_ss=r
I recommend the Sumo for the K1.
https://donnyfl.com/collections/ldc/products/1-5-x-6-5-inch-sumo
We do not make a fill probe for the K1.