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Weldona, Colorado 970-368-4455

DieselOrings is a small, family owned and operated business located in the sparsely populated plains of Northeastern Colorado.
UPS is delivering orders in a reasonable time compared to what we see with USPS.
Please understand that these delays are out of our control.
  3/26/2020 - UPS has suspended Guaranteed Delivery for Next Day Air, 2nd Day Air, 3 Day Select and Ground.
UPS has denied all claims for missed delivery dates. (LINK)


#12-001 Fluorosilicone Drain Valve O-ring Set

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#12-001 Fluorosilicone Drain Valve O-ring Set


Availability: In stock

Fuel Drain Valve O-rings Fluorosilicone MilSpec M25988/2

The drain valves on the 1994.5-1997 models require the same o-rings as the 1999-2003 models.

Fuel Drain Valve o-rings A set of 2 High Quality Fluorosilicone MilSpec M25988/2 (FVMQ) O-rings for the Fuel in Water drain valve and 1 Viton O-ring for the valve stem. For the drain valves on both the 1994.5-1997 trucks and vans along with the 1999-2003 trucks and vans.

All of our O-rings are Made in the USA for the original OEM Fuel Bowl and drain valve!

Temp range: -70º F to +437º F used in military aircarft fuel (JP-4, JP-5, JP-8), aerospace and lubrication applications.

Blue Fluorosilicone: The Blue Fluorosilicone elastomer is a Military Specification material that has a much wider temperature range than Viton (A) or Viton (B) and is widely used where fuel contains corrosive agents that are found in ULSD. Bio and veggie fuels. They will stay flexible in arctic conditions down to -70º F and can withstand temperatures in excess of 400 F.

ParkerFrom Parker Hannifin :
"In the automotive market, fluorosilicones are the seal material of choice for handling gasoline, E85, diesel fuel, biodiesel and ULSD at extremely low temperatures."


Order of 1 is a set of 3 o-rings. The third o-ring is a Viton for the stem of the valve which keeps moisture and contamination from getting into the interior of the valve. For all 94-03 F-series trucks.

Instruction Sheet: Download PDF file Here.

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Item #12-001

obs drain valve

drain valve
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