22nd February 2016 - By Aaron Gadberry
The Keurig K155 is the only Keurig model currently sold that supports a direct water line connection. No one really knows the differences between the K155, B155, K150 and B150. We were lucky enough to be gifted a K155 for Christmas this past year.
The DPK kit is pretty difficult to find. There is no part listing on the Keurig website, which led me to question if it was even a legitimate Keurig part. It turns out that the DPK is not sold directly to consumers, but is sold to business distributors instead. Call Keurig business to get a number for a distributor. The DPK should run approximately $90.
Since details are spare on the DPK, I will list some of them here. Please bear in mind these will go out of date over time, but were relevant for the unit I received.
The DPK is a replacement for the reservoir. It is approximately the same size and shape as the original reservoir, but is completely different in several other ways.
The water line hooks to the back of the DPK reservoir, and the DPK reservoir is partially filled at all times. The fill is cut off by an electronic sensor. There is a backup float valve sensor that will prevent the reservoir from overfilling if the electronic sensor fails. The connector on the DPK is the same as a 3/4″ male hose connection. You will need a 3/4″ female hose adapter to your water line, typically a 1/4″ poly line. You will probably also want a cutoff and T-joint. You may check with the business distributor if they can provide these. Mine was able to include all the necessary equipment to install at a fraction of the price elsewhere.
You must filter your water before feeding it to the DPK. If you do not have a filtration system in place, the business distributor may be able to assist with this as well.
The DPK reservoir does not double as a regular reservoir. It is only intended to be filled by direct water line. It holds significantly less water than a standard K155 reservoir. It stops filling at about 20% full. The DPK reservoir is screwed into the K155, and the DPK lid is screwed onto the DPK reservoir. You may be able to fill it via pitcher if you left the lid unscrewed, but it is certainly not the intended use.
One of the largest complaints about the stock K155 is the plastic smell and taste. Keurig is aware of this issue, and is willing to replace units that experience it. Unfortunately, it is such a systemic problem that my replacement had it as well. They would not replace it another time for me.
This issue and the offgassing process are both thoroughly documented elsewhere. I’m not going get into this issue further, except as to the DPK and how it avoids the issue.
The DPK reservoir is mostly constructed of a different plastic than the original K155 reservoir. The plastic used in the DPK reservoir appears to be already offgassed, or not require offgassing. Mine did not smell much, even straight out of the box.
Overall, I am enjoying the DPK very much. Before buying the K155 with the intent of adding a DPK, check with the business distributor for a K155 with DPK pre-installed. It is possible this will be a less expensive option overall.
Below are some pictures comparing a standard K155 reservoir to a DPK reservoir.