Prism Supply© Polished Steel Petcock - Available In 1/4" or 3/8" NPT, For Use with 5/16" Fuel Line

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This Custom Petcock is not only Unique but it's guaranteed NOT to leak...  For Life!


If it leaks for any reason, simply return it to be rebuilt for free.


• Machined from High Grade Stainless Steel right here in the USA using domestic material.

• This unique petcock fits direct to a 1/4" or 3/8" NPT bung on your gas tank (Please choose size.)

• Features a 5/16" diameter hose barb on one end and a fuel filter on the other. 

• All you have to do is rotate the cylindrical piece with the two grooves to toggle the fuel ON or OFF (NO RESERVE.)

• The fuel line will not rotate while rotating the petcock.

• NPT is a tapered thread that seals as you tighten the petcock. (No need for pipe dope or Teflon tape.)

• We also offer bungs, fuel hose and hose clamps.


• Also available in BRASS.



Length             =             2-7/16"

Male NPT          =            1/4” or 3/8"

Barb                =            5/16" ID Hose



Any tank that will accept the listed dimensions with a 1/4" or 3/8" NPT Bung.

We also offer Bungs, Hoses and a Clamp!