Most car water bladders are designed for potable water and come with various connections and fittings. However, if the bladder is used solely for storing water and not for drinking purposes, and it can be connected to the Off-Grid Plumbing hose end fitting, which is a 1/2 BSP female quick-connect, then you're all set to use the pump and its hoses.
Can I use the Off-grid Plumbing kit for my potable water bladder?
No. While no dangerous materials have been used, we have not been tested to be safe for potable use. So, we cannot make that claim and do not recommend drinking water.