Some good reasons to upgrade to a pump with an EXTERNAL UNLOADER:
- External unloaders can be configured to have the bypass water return to a tank or to be dumped to the ground for the best possible cooling.
- If you don't run off a tank or can't dump the water, external unloaders (aside from bolt-on banjo unloaders) will circulate more water outside of the pump for better cooling.
- External unloaders can be replaced when worn out very easily and inexpensively without having to replace the pump.
Note On Internal Unloaders: Commercial pumps built with internal unloaders usually have replacement parts available. Unfortunately these repair kits can be expensive and are not a complete unloader replacement since the main body of the unloader is part of the pump head.