K-100 & K-200 Spare O-ring - In the models K-100 and K-200 the spare is found in the bottom of the pump body...  Remove the retaining screw then the plunger.  A quick inspection down in the bottom of the bottom of the "pump body" and you should see the "spare O-ring". Read the full article »

What lubricant should I use - We have found that most all lubricants work good but some better than others. Most will work for a short period and then something will usually affect them and they become compromised. Read the full article »

K-40/400 O-ring Issues - When the first generation of K-40s and K-400s was made,  the O-rings  seemed to work well...  As time went on it was discovered that if the pumps were inactive or used infrequently, the lubrication migrated into the O-ring material causing it to shrink. Read the full article »