*** Our Vented cap WILL LEAK. The cap is vented by machining a groove into the threads and below the gasket allowing the gasket to be bypassed. Tanks that are not stationary (Like in the back of a truck) will leak fuel as is sloshes back and forth. We recommend using a NON Vented cap in all situations and utilize a vent port on the tank itself.
What does NPSM Loose Mean? NPSM stands for National Pipe Straight Mechanical. Loose means that we machine these on the higher end of the tolerance to account for Weld distortion to the neck and expansion and contraction throughout the seasons.
Purchased several products from Boyd Welding over the past couple months and all were great quality and arrived quickly. Thanks for helping the DIY enthusiast!
L
Lawrence Peay
Fantastic products
I used to make my own filler necks and caps but since I've been using yours I like how my tanks look quite a lot more.
