Easy
15-30 minutes
Genuine Porter Cable replacement part, this item is sold individually.
The Head Valve Seal is in stalled on top of the 904695 Cylinder.
It provide a seal for the Head valve.
If you air leaks in your nail gun you may consider the part number 904949 Overhaul Kit.
Head Valve Seal 904689
OEM part for: Porter Cable
Part Number: 904689
$10.28
In Stock
Order within the next 12 hours and your part ships today! 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 3 machines
Porter Cable
FN250B 16 Gauge Finish Nailer View Diagrams & Manuals
FN251 (Type 1) Flooring Nailer View Diagrams & Manuals
FN250B (Type 1) Finish Nailer Power Tool View Diagrams & Manuals
This item works with the following types of products:
- Nailer Parts
Customer Part Reviews ?
Average Rating (out of 5):
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5 stars
28
4 stars
0
3 stars
0
2 stars
1
1 stars
0
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Easy valve seal install. Leaking, hissing nail gun issue resolved.
Part arrived quickly.
Guest -
November 6, 2023
Verified Purchase
Great part!
The part arrived in a timely manner, and worked perfectly.
Derek -
October 4, 2023
Verified Purchase
Great service!
Staff was very supportive from diagnosis to repair. Kept me posted on status throughout. Will gladly work with ereplacement again!
Guest -
April 25, 2023
Verified Purchase
Easy, fast
Great site and excellent service.
Ryan -
March 14, 2023
Verified Purchase
Easy repair
This was causing a big air leak and the gun was not functioning. Received the part very quickly and was back in business.
Thank you ereplacementparts
Guest -
January 13, 2023
Verified Purchase
Head seal for Porter Cable
Perfect fit. Parts diagram was easy to read on order to know what part I needed. Easy ordering and delivery.
Guest -
November 25, 2022
Verified Purchase
Air leak in nail gun
I replaced this head seal and fixed my problem
Guest -
June 7, 2022
Verified Purchase
Worked as expected
My nailer started leaking air, I removed the cover and found the head valve seal was cracked and brittle. I searched this site for the replacement part and found it. The other reviews described my exact problem, I ordered the part, it came a day earlier than I expected, I installed the part, replaced the cover and the nailer worked perfect.
Guest -
November 26, 2021
Verified Purchase
Super easy repair
Saw some gasket repair kits on other sites which almost exceeded the price of a new tool “e replacement parts “ had the problematic part sold individually. I love fixing things in this throw away world and love this company.
Guest -
October 16, 2021
Verified Purchase
Problem Fixed
Exact fit. Perfectly replaced the original. Nailer is working like new.
Guest -
June 12, 2021
Verified Purchase
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
t
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Head Valve Seal
Will this seal fit my nail gun?
T
for model number FR350 type2
asked on 2023-03-16
Hello T, Thank you for contacting us. We have researched the model you have provided and have found the part you are looking for is Part Number: 886108. We hope this information helps!
eReplacementParts Team March 16, 2023
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Had air leaking at a rapid rate from the top of the nailer.
Earl - January 6, 2016
👍 38 of 38 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Hex head allen wrench
Parts Used
Unscrew the 4 Allen bolts from the top of the nail gun. The offending part, a seal, was directly under the cap and the original one had deteriorated to the point it was in pieces. I removed all the pieces, cleaned up the entire area and replaced the seal with the new one. Then it was just a matter of putting the head back on and securing it with the 4 Allen bolts. Plugged it into the air hose and all was right with the world once again. Total time------maybe 15 minutes and easy as pie.
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Seal head valve was dried, cracked and broken
Allen - December 26, 2015
👍 14 of 14 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen head wrench
Parts Used
Removed head from gun by loosening and removing 4 screws; removed old cracked and broken seal head valve; cleaned area of all debris; installed new seal head valve; replaced head on gun; tested gun on sample pieces of wood; all worked well.
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Loss of pressure
Gregory - December 8, 2015
👍 10 of 10 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Hex wrench
Parts Used
Removed 4 hex screws head of nail gun. Replace damaged/ worn seal. Replace head. Works well!
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Rebuild head valve
Joseph - November 12, 2015
👍 8 of 8 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Hex wrenches
Parts Used
The piston stop had hardened and crumbled. I removed the top of the gun by removing the four hex screws. Then the top of the gun comes off and you can take out the piston stop. I also replaced the head valve seal because it is made out of the same kind of plastic. Pretty easy and now the gun works again.
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Head valve seal deteriorated
George - February 23, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
Remove the four screws from the cap. Then you will see the broken seal. Clean out all of the pieces of the seal, then if you think you have them all look again. Install the new seal. And place the the cap back on and secure with the four screws.
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Air was leaking
Jerry - December 6, 2015
👍 3 of 3 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, allen wrench
Parts Used
Remove head, located defective seal, remove the old one , then replaced it with the new seal. Check all other parts for wear. Installed head back on. No air leaks!
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Head seal split blowing air
michael - September 18, 2018
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Parts Used
Removed 4 allen screwd, pulled head seal on top put little oil replaced head and allen screws.
Good as new
Good as new
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Air continuously blowing out of the top
Allan - August 14, 2018
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
Removed top plate and replaced head valve seal
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Non-metalic internal parts disintigrated
Michael - August 9, 2018
Tool Type
Nailer
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Allen Wrench
Parts Used
1. Disassembled Nailer
2. Removed debris, residue and broken parts
3. Installed new parts.
4. Applied pressurized air and tested for correct operation.
5. Test failed. Nailer drove one nail, but did not reset. All air pressure lost.
6. Disassembled Nailer again.
7. Installed parts correctly.
8. Reassembled and retested.
9. Nailer worked properly.
2. Removed debris, residue and broken parts
3. Installed new parts.
4. Applied pressurized air and tested for correct operation.
5. Test failed. Nailer drove one nail, but did not reset. All air pressure lost.
6. Disassembled Nailer again.
7. Installed parts correctly.
8. Reassembled and retested.
9. Nailer worked properly.
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air finish nailer leaking air from top of gun
William - June 29, 2018
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Allen wrench
Parts Used
1) Open top
2) Remove broken / deteriorated parts, replace with new parts. Only hard part was the old piston stop needed needle-nose pliers to pull out.
3) Close top
2) Remove broken / deteriorated parts, replace with new parts. Only hard part was the old piston stop needed needle-nose pliers to pull out.
3) Close top
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
