"Does my Slayer Espresso Machine need a Water Pump System? Slayer says I don't have to have one. "
We have seen this question come across our inbox a few times recently and we have some thoughts, research and opinions.
After the first time we heard this question we reached out to the tech department of Slayer and had a great conversation:
In the past, there may have been some talk about "just dropping the lines in a bucket", but it's not that simple. A self-priming rotary pump can effectively draw from an open bucket, but this will probably cause greater strain and amp draw on the pump over time. If that situation was ever recommended, it was hopefully for a temporary solution.
For long-term or permanent setups, the phrase "can draw from an external reservoir" should be used at the installer/technician's discretion. Reservoir doesn't necessarily mean "bucket", but rather a non-plumbed water source. This allows for the freedom to build out a good mobile set-up for the customer. For example, a mobile coffee cart would probably be outfitted with an external pump and regulator with check valves in-line, such as the ones Caffewerks makes.
Bottom line: a pump's greatest threat is running dry or on bad water, and it's up to the seller/installer to make sure that isn't a situation that can happen. Using in-line pressure is the best approach to this and the reason it's listed on the install requirements."