Product Summary

Universal Fit, 1-6 Fuel Pressure Rating (psi), Steel

  • 5/16", 3/8" connectors (1-6 lb.)
  • Includes fittings
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Key Specs

MFG. Part #12-804
BrandOffenhauser
Regulator StyleAdjustable
Material TypeSteel
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Need To Know

Quick and Easy Returns

Return Policy

Offenhauser 12-804 Details

This Offenhauser chrome universal fuel regulator is adjustable from 1-6 PSI, making it an affordable option for a variety of low pressure carbureted applications. Fuel pump regulator has 1/8" NPT female threads and includes both 5/16" and 3/8" hose barb connectors.

Note: This fuel regulator is NOT compatible with ethanol or fuels containing lead.

Offenhauser 12-804 Specifications

KEY SPECS
MFG. Part #12-804
BrandOffenhauser
Regulator StyleAdjustable
Material TypeSteel
GENERAL
Fuel Pressure Rating (psi)1-6
Pressure Regulator Inlet Size1/8" NPT
Pressure Regulator Outlet Size1/8" NPT
NotesIncludes hardware to splice into 5/16" and 3/8" line. Adjustable from 1-6 lbs.
Overall Height1.50"
Outside Diameter2.20"

Ratings & Reviews

4.5

47 Reviews

Overall Assessment

This product, a fuel pressure regulator, received largely positive feedback from customers for its reliable performance, flexibility, and quality materials. Users noted that it was easy to install, adjust, and fit onto various engine setups, including on vintage models. It succeeded in controlling fuel pressure accurately, often resolving issues like vapor locking and overpressurization caused by other pumps. It was praised for its classic, retro aesthetic and its compact shape. Some pointed out inconsistencies in pressure regulation, but a majority of reviews highlighted how effective it was. Direct comparisons to other brands illustrated it as a preferred option due to its precise pressure readings. It's particularly recommended for multiple-carburetor setups, demonstrating its functionality. However, durability and longevity could be areas for possible improvement.

4.5

47 reviews

5

37

4

5

3

1

2

0

1

4

Most Liked Positive Review

5.0

Worked very well.

I put a Carter electric fuel pump in the trunk of a 1949 Packard, to replace the original on the engine. It was causing some "seep" on the old carb. Loved the adjustability of this unit. I was able to get adequate volume, without over pressurizing the carb. I mounted it immediately downstream of the fuel pump, in the trunk. I suspected a potential problem, and left room for the install. Looks great also.

Most Liked Negative Review

1.0

Product needs improvement

I have received three of the regulators. The first one was on my car for 4 years and 7500 miles before it failed to regulate (reduce) the fuel pressure. I then ordered a replacement and it began leaking from under the adjustment knob after about an hour and 48 miles. I now have a replacement for the second one and it is working ok after about 120 miles of use. The pressure is set at 3 psi. I took the first one apart to see how it failed and the diaphragm was wrinkled and expanded. I use 91 octane E10 gasoline.

Filter by Ratings

If needed I would buy again

5.0

a month ago

Rapidron

Summerfield North Carolina.

Verified

I installed the regulator because I am using an electric fuel pump. It did yes not come with a mounting bracket so I fabricated one and mounter it on the firewall. Works fine.

Would Recommend

Good regulator.

5.0

a month ago

Witchdoctor

Cabot, PA

Verified

This regulator stopped the flooding of my engine.

Would Recommend

Works Perfect

5.0

7 months ago

SM25

Iowa

Verified

Exactly What I needed

Would Recommend

Leaked after 10 months

1.0

a year ago

JM4

Colorado

Verified

I put this in a 50 Plymouth with an electric fuel pump with 7 psi. The regulator started leaking at the adjustable pressure dial after 10 months. Glad I didn't have a fire!!!

Would Not Recommend

Looks and works perfect!

5.0

a year ago

Lucky

Caledonia, WI

Verified

Again, looks and works perfect. Easy to adjust with just fingers!

Would Recommend

yes I would buy this again

5.0

a year ago

obadia harslarger

Waddell AZ

Verified

regulate fuel flow to my stromberg carbs on my flathead

Would Recommend

Perfect fit and function

5.0

a year ago

Dog

Louisa, Va

Verified

Worked great for what I needed

Would Recommend

Should last longer !

4.0

a year ago

Steve-O

Maryland

Verified

I like the look , how you can adjust it , the size , but ...... it only lasted 2 years , i just put another one on . The first one started leaking around the front of it , under the dial .Hope this one lasts longer ???

Would Recommend

Worked perfect

5.0

2 years ago

Dave Z

Lincoln Nebraska

Verified

Holds my fuel pressure to 1.5 psi

Would Recommend

Yes I would buy again

5.0

2 years ago

None

Bremerton Washington

Verified

Everything worked out great thanks to sales and tech very professional

Would Recommend

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Showing 10 of 47 reviews

Questions & Answers

14 Questions • 12 Answers

Hi,is this regulator suitable foe a sbc running a holley carb,and will it work with 6-an fittings. thnx Ken

by ken

• 8 years ago

2 answers

Does this replace the original Filt O Reg and does the glass bowl with cork filter screw into the bottom?

by carmen

• 10 years ago

1 answer

Has this been updated to be ethanol compatible yet? Also is there a return port version?

by JeepBoy

• 10 years ago

1 answer

Hello, is heat an issue for this unit? my exhausts are just a few inches away and the one of these i bought didn't work from the start but before i replcae it with another i wanted to check.

by Tedders

• 10 years ago

1 answer

How much pressure can you push into this product

by Mike

• 10 years ago

1 answer

It states it is NOT c/w ethanol... How can everyone be buying this if it is not?? all the fuel has etoh in it, so what does this mean?? surely it IS c/w modern fuels, no??

by m r weiss

• 10 years ago

1 answer

i have installed an in tank fuel pump that runs 12 psi and i have a 48 ford fladhead v/8 engine running 3 carbs that run with about 3 to 4 psi !!! can i use this pressure regulator ????

by quest1946

• 11 years ago

1 answer

What is the diameter of this regulator?

by Dave

• 11 years ago

1 answer

Can this regulatator mount free fall off the fuel line without mounting to the fender. Does the part weight too much to mount this way?

by JamesH

• 11 years ago

1 answer

What is the max input pressure of this regulator

by TestEng

• 12 years ago

2 answers

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