A very cool system on a Kranzle happens between the two seals.
Two seals work together to keep water from leaking around the plunger assembly. The first seal takes the brunt of the force and blocks most of the water as it’s being compressed to 1000+ psi. There is a second seal that blocks the residual water from getting any further. This begs the question, what happens to the water trapped between these two seals?
In the pump head, you’ll notice there is a small hole in the pump. There are also grooves in the brass retainer to help channel the water to these holes. This is a leakage port that leads back to the chambers of the pump. When water gets past the high-pressure seal, it will reroute to this hole. Once the water reaches this hole, it will get sucked back into the pump. It uses capillary action or the venturi effect to create a vacuum. The water is pulled away from the seals back to the main water supply.
When your seals fail, the water will get past both seals. Kranzle has designed this water to leak out the bottom of the pump. One reason they did this is to signal to the user that there is an issue with the seals. This is also designed so that the water doesn’t build up and enter the transmission where the oil is.
Hope you learned a little more about your Kranzle pump and, at the very least, got familiar with some of the terminology.