Yes, in fact, some people order them without gauges. Just replace the gauge with stainless steel pipe plugs. This is not true for top mounted gauges, which are much more prone to introduce dirt into the system, so please send to a pro.
"I pump the Integral up and it only pumps a little and then it won't pump any more.
The rod does not retract all the way, even with zero backstay tension. What is happening?