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Review on πŸ”§ R12T Fuel Filter Water Separator Complete Kit - Marine SPIN-ON R12T Filter Replaces S3240 120AT NPT ZG1/4-19 Fit 3/8 Inch NPT Outboard Motors For Diesel Engine With Four Fittings: High-Performance Filtering System for Superior Water Separation and Optimal Engine Performance by Brian Sage

Revainrating 2 out of 5

NO NPT Threads on Filters

Information states this item has 1/4-19 NPT threads, it does not have NPT threads. Spike /16, Couldn't find any NPT fittings that would work. Did some research and found that NPT is a 1/4-18 thread. It has a 1/4 BSP or British Standard Pipe 1/4-19 thread. The thread pitch is different so standard US NPT threads will not work. Very misleading description that NPT says. It works if you use the supplied threaded barbs, but they are screwed if you need to change the barb size like I have to do.

Pros
  • Hands Free
Cons
  • Doubtful