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Speedway Disc Brake Residual Valve, 2 PSI, Purple

Specs
Material Type:
Aluminum
Overall Length:
1.60
Sold in Quantity:
Each
Finish:
Anodized
Overall Diameter:
.67
Outlet Fitting:
1/8" NPT
Garage Sale:
No
Notes
Use 2 PSI for disc brake applications.
Speedway Disc Brake Residual Valve, 2 PSI, Purple
Speedway Disc Brake Residual Valve, 2 PSI, Purple
Product Video
Speedway Disc Brake Residual Valve, 2 PSI, Purple

Click image to enlarge

Watch the video below to learn more about the differences in brake lines, flare types and fittings you may want to consider before plumbing away on your current chassis project.

Details

Reviews

Q & A

What's in the Box

Ever had problems with a spongy pedal or slow, unresponsive brakes? If so, you may need a residual pressure valve installed in your brake line. A residual valve acts like a one-way or check valve to maintain brake system pressure to eliminate the problems of a spongy pedal. This 2 PSI residual valve is installed inline between the master cylinder and disc brake calipers to keep 2 PSI of residual pressure at the caliper after the brake pedal is released. This ensures that you will have a high, firm pedal next time you press the brake pedal.

If your master cylinder is located below the floorboard, installing a 2 PSI residual valve is highly recommended. If your master cylinder is mounted on the firewall, a residual valve is generally not needed because gravity will provide a natural residual pressure within the brake line.

Our residual pressure valve features a distinctive purple anodized finish with 1/8" NPT port at each end. Use 2 PSI residual valves for disc brake applications only.  Inverted flare or AN threaded adapter fittings to the 1/8" NPT female thread will be required and are noted below and available as required.

Customer Reviews

Rated 4.6 out of 5 by 16 reviewers.
RATING BREAKDOWN
16 reviews
5 Stars
12
4 Stars
3
3 Stars
0
2 Stars
1
1 Star
0
RECOMMEND THIS PRODUCT:

Marty
Verified Purchaser
Verified Reviewer
Kentucky

Great Procuct

July 21, 2015
Works Great
Yes, I recommend this product.
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Big Al
Verified Purchaser
Jacksonville, Ar.

residual valve 2 psi

June 26, 2015
works good for what I needed them for
Yes, I recommend this product.
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oscar meyer
Verified Purchaser
owensville mo

valve worked perfect

June 04, 2015
service is great. my last order was received in Owensville, mo in less than 24hrs that was outstanding!
Yes, I recommend this product.
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Kdorfner
Verified Purchaser
Verified Reviewer
DeBary, Fl.

A must have

May 31, 2015
I use this on all my cars with disc brakes and under floor master cylinder, such as my 29 Model A and the 27 Model T I am building now.
Yes, I recommend this product.
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ozarkmtnpaw
Verified Purchaser
Ozark, MO, USA

Disc Brake Residual Valve, 2 PSI, Purple

April 04, 2015
Excellent - Item delivered the other day, was as described, great customer service. I just want to tell you all at Speedway, how satisfied I am. Thank you!
Yes, I recommend this product.
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1940Pickup
Verified Purchaser
Rustburg, VA

Big difference

March 16, 2015
I wasn't aware this valve was needed until I read an article in a recent Street Rodder magazine. I installed this valve and could immediately feel the difference in my brake pedal. Great price too.
Yes, I recommend this product.
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shoog
Verified Purchaser

does work but.

October 31, 2014
this product must be fitted with adapters fitted to each end, the problem is they are 1/8 tapered and tend to leak,no matter how much pressure use.
No, I would not recommend this product.
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Merchant Response:

shoog- It is suggested that sealant be used on the threads to ensure the fittings do not leak. I hope that you find this information somewhat helpful to a successful installation. If you need further assistance on proper assembly, you may call one of our knowledgeable techs at 1-800-979-0122.
1949shoebox
Verified Purchaser
Tennessee

a must have when mc is under floorboard

October 09, 2014
installing in both front and rear brakes since converting to disc brakes on the shoebox ford. a must have acceptable brake operation.
Yes, I recommend this product.
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Pintoman
Verified Purchaser
NY

Good

June 09, 2014
Product works well. Only trouble is it came with no instructions. I had to call the help line to find out how to install it. Found out it was pine threads instead of 3/8 X 24.
Cons:
  • should say what thread size it is.
Yes, I recommend this product.
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sknkwrks
Verified Purchaser
Pearl, IL

Class A company and Class A parts

April 22, 2014
The RPV valve has great fit and finish. I used the 10# previously and switched from drum to disc rear so needed to change. Never had any hesitation, Speedway was the first (and only ) place I looked. Resonable prices and exceptionally quick delivery. WTG guys !
Yes, I recommend this product.
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Page 1 of 2

Product Q&A

4 questions : 9 answers

2 answers

I will be using master cylinder 91631926, will these rpv fit the same brake line threads as used in this master cylinder?

bugg
leominster ma
April 24, 2014

I will be using master cylinder 91631926, will these rpv fit the same brake line threads as used in this master cylinder?

Answers

February 12, 2015
rubberhead
No theses have 1/8" pipe threads not inverted flare.
April 25, 2014
EricM
No this will not screw into that master cylinder. Usually a steel brake line will be used at the master cylinder outlet, then you can use adapters part number 91031831 to be able to mount these to the steel brake line.
3 answers

I have disc front and rear will I need a residual valve if my master cylinder is mounted on the firewall?

harleyrules
New Jersey, USA
September 18, 2013

I have disc front and rear will I need a residual valve if my master cylinder is mounted on the firewall?

Answers

November 01, 2014
shoog
its not necessary , gravity will keep the line full. the valve may stop the piston from going back further than they need to , possably giving you a shorter travel pedel.
September 27, 2013
dawg
yes you will need a 2psi on front and rear
September 18, 2013
Jason
If the master cylinder is the highest point in the brake system it would not be a must to use reidual valves in this application. However, it will keep pressure at caliper for quicker response.
3 answers

Do i need a residual valve if my master cylinder is the high point of my brake system?

ray
gilbert az
June 02, 2011

Do i need a residual valve if my master cylinder is the high point of my brake system?

Answers

February 12, 2015
rubberhead
No only if master cylinder is below calipers or wheel cylinders such as below your floor.
October 14, 2014
1949shoebox
Not a must but the system will perform better (ie: higher pedal) with the residual valves installed
June 03, 2011
Jason
No, it would not be a must in this application. However, it will keep pressure at caliper for quicker response.
1 answers

Can I use inverted flare fitting without any adapters

dirt6792
iowa
June 06, 2015

Can I use inverted flare fitting without any adapters

Answers

June 08, 2015
Eric
Expert
No this will need to have the included adapter fittings installed to use a 3/8"-24 inverted flare connection. These residual valves have 1/8" NPT female threads to make them more universal and fit more applications.
Page 1 of 1

You may also be interested in:

Wilwood 260-1874 Blue Disc Brake Residual Valve, 2 PSI
(Part #8352601874)
                        

These in-line pressure valves retain a minimum brake line pressure to help eliminate excessive pedal travel in disc brake systems. Residual pressure valves are made from billet aluminum with 1/8" npt female threads for the inlet/outlet and color coded for easy identification. Ideal for drag racing, circle track, street rod and many off road applications.

The two pound valve is used in disc brake applications where the master cylinder is mounted below the horizontal plane of the calipers and fluid drain back occurs from gravity and vibration, thereby causing excessive caliper piston retraction and a longer brake pedal stroke. The minimal two pound residual pressure prevents fluid from flowing back without causing the brakes to drag.

835-2601874 Instructions (PDF)

Brake System Builders Tip (Link)

Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection

Item Details

Disc Brakes
Disc Brake Residual Pressure Valve, 1/8 NPT, 2 PSI
(Part #91031340)
                        

Ever had problems with a spongy pedal or slow, unresponsive brakes? If so, you may need a residual pressure valve installed in your brake line. A redesidual valve acts like a one-way or check valve to maintain brake system pressure to eliminate the problems of a spongy pedal. This 2 PSI residual valve is installed inline between the master cylinder and disc brake calipers to keep 2 PSI of residual pressure at the caliper after the brake pedal is released. This ensures that you will have a high, firm pedal next time you press the brake pedal.

If your master cylinder is located below the floorboard, installing a 2 PSI residual valve is highly recommended. If your master cylinder is mounted on the firewall, a residual valve is generally not needed because gravity will provide a natural residual pressure within the brake line.

Valve is 1/8" NPT male on the inlet side and 1/8" NPT female on the outlet side. Use 2 PSI residual valves for disc brake applications only.

Brake System Builder's Tip (Link)

Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection.  

Speedway Drum Brake Residual Valve, 10 PSI, Purple
(Part #91031347)
                        

Ever had problems with a spongy pedal or slow, unresponsive brakes? If so, you may need a residual pressure valve installed in your brake line. A redesidual valve acts like a one-way or check valve to maintain brake system pressure to eliminate the problems of a spongy pedal. This 10 PSI residual valve is installed inline between the master cylinder and drum brake wheel cylinders to keep 10 PSI of residual pressure at the wheel cylinder after the brake pedal is released. This ensures that you will have a high, firm pedal next time you press the brake pedal.

Our residual pressure valve features a distinctive purple anodized finish with a 1/8" NPT port at each end. Use 10 PSI residual valves for drum brake applications only.  Inverted flare or AN threaded adapter fittings to the 1/8" NPT female thread will be required and are noted below and available as required.

 
Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection.  
Speedway Disc Brake Residual Valve, 2 PSI, Polished
(Part #91031346)
                        

Ever had problems with a spongy pedal or slow, unresponsive brakes? If so, you may need a residual pressure valve installed in your brake line. A redesidual valve acts like a one-way or check valve to maintain brake system pressure to eliminate the problems of a spongy pedal. This 2 PSI residual valve is installed inline between the master cylinder and disc brake calipers to keep 2 PSI of residual pressure at the caliper after the brake pedal is released. This ensures that you will have a high, firm pedal next time you press the brake pedal.

If your master cylinder is located below the floorboard, installing a 2 PSI residual valve is highly recommended. If your master cylinder is mounted on the firewall, a residual valve is generally not needed because gravity will provide a natural residual pressure within the brake line.

Our residual pressure valve features a fully polished finish with a 1/8" NPT port at each end. Use 2 PSI residual valves for disc brake applications only.

 
Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection.  
Straight 3/8 Inch-24 IFF to 1/8 Inch NPT Male Adapter
(Part #91031831)
                        

Brass adapter.

Straight 3/8"-24 IFF to 1/8" NPT Male Adapter

Stainless Steel Straight AN3 to 1/8 Inch NPT Adapter Fitting
(Part #6178514)
                        Straight AN to NPT adapters.
                    
Straight -3 AN Male to 1/8 NPT Male Adapter Fitting
(Part #6174244)
                        

Brake Adaptor.

  • 1/8" NPT