Tire pressure indicator valves - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-19-2009, 02:42 PM   #1
Senior Member
 
Bobbie Mayer's Avatar
 
Name: Bobbie
Trailer: 2011 Escape 15A
Washington
Posts: 3,236
Registry
I'm looking at this kind for the trailer

http://store.vehiclelight.com/airalert.html

but also wonder about the car ones (you can get a set of four pre-set for a given pressure for cars for about $10.)

Does anyone use them? Do they work?

Bobbie
__________________

__________________
Bobbie Mayer is offline   Reply With Quote
Old 03-19-2009, 03:56 PM   #2
Senior Member
 
Byron Kinnaman's Avatar
 
Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
Posts: 6,312
Registry
Anything that screws on the end of the valve stem is likely to cause a leak. What happens is they leak and indicate that the tire is low you're fooled into thinking they're doing something positive when they're the cause of the leak.

Brief explanation:

The tire valve (Shrader valve) is designed such that the higher the pressure the tighter the seal. When you screw one of these things on the end of valve stem the Shrader valve is released. Then you no longer have the greater the pressure the better the seal. You have the greater the pressure the more likely the seal is to fail. The air pressure attempts to blow the seal apart. Not a good thing.
__________________

__________________
Byron & Anne enjoying the everyday Saturday thing.
Byron Kinnaman is offline   Reply With Quote
Old 03-19-2009, 04:18 PM   #3
Senior Member
 
Name: George
Trailer: Waiting for the Sprinter van and designing the converion modules.
Oregon
Posts: 629
I believe this product has 13 reviews on Amazon_review and it is not very positive. I had once a plastic mechanical device and it broke while driving my motorcycle. I believe that the concept is great but reliability is an issue.


George.




__________________
GeorgeR is offline   Reply With Quote
Old 03-19-2009, 07:20 PM   #4
Senior Member
 
Donna D.'s Avatar
 
Name: Donna D
Trailer: Escape 5.0 TA, 2014
Oregon
Posts: 24,434
It's really too bad, but I don't think they're reliable. If they break... is it when they're displaying red or yellow. Or Gad... when they're green. A person might end up with a false sense of security and a very flat tire.
__________________
Donna D.
Ten Forward - 2014 Escape 5.0 TA
Double Yolk - 1988 16' Scamp Deluxe
Donna D. is offline   Reply With Quote
Old 03-19-2009, 08:15 PM   #5
Senior Member
 
Bobbie Mayer's Avatar
 
Name: Bobbie
Trailer: 2011 Escape 15A
Washington
Posts: 3,236
Registry
Thanks, everyone, especially Byron for the explanation.

I was thinking about it earlier and thought that what would be nice is a cap that allowed you to fit on a gauge and read the pressure without unscrewing it- but didn't actually release the pressure like these did. (Sort of a snap-lock gauge.)

__________________
Bobbie Mayer is offline   Reply With Quote
Old 03-19-2009, 10:58 PM   #6
Senior Member
 
Name: George
Trailer: Waiting for the Sprinter van and designing the converion modules.
Oregon
Posts: 629
Quote:
Anything that screws on the end of the valve stem is likely to cause a leak. What happens is they leak and indicate that the tire is low you're fooled into thinking they're doing something positive when they're the cause of the leak.

Brief explanation:

The tire valve (Shrader valve) is designed such that the higher the pressure the tighter the seal. When you screw one of these things on the end of valve stem the Shrader valve is released. Then you no longer have the greater the pressure the better the seal. You have the greater the pressure the more likely the seal is to fail. The air pressure attempts to blow the seal apart. Not a good thing.
I agree plus Schrader valve is a 118 years old design. It is likely one of the most reliable automotive part and routinely changed during mounting of new tires. The pressure sensors mounted inside the tire on the rim will bypass this potential leak issue but these wireless systems are expensive.


George.


__________________
GeorgeR is offline   Reply With Quote
Old 03-20-2009, 09:24 AM   #7
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
I have used them for years on 3 vehicles and have found that they seal and do not leak. I have the ones that have the tire pressure on the top and they change from green to yellow to red if the pressure gets low and guess what, they are not changing. Due to the same post last year stating that they leak, I checked the pressure with a professional gage and found that the caps were correct.

I purchased mine from www.jcw.com and I saw them at WalMart.

Should you see them at WalMartt, look on the package to see if there is a statement concerning DOT approval.
__________________
Darwin Maring is offline   Reply With Quote
Old 03-20-2009, 10:37 AM   #8
Senior Member
 
Name: George
Trailer: Waiting for the Sprinter van and designing the converion modules.
Oregon
Posts: 629
Darwin,

You likely use these Pressure Caps http://www.accu-pressure.com/ sold by JC Whitney. They are not DOT approved. Accu-pressure Co. claims that high cost is preventing them to get the approval. My experience with a different brand (plastic body) was not just a leak but complete loss of pressure. The top of the cap broke off while riding my road bike in the boonies with no cell phone coverage. Fortunately it was my rear tire. Accu-pressure is using metal body which could be more robust.

George.

__________________
GeorgeR is offline   Reply With Quote
Old 03-20-2009, 11:31 AM   #9
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
George, Actually I have 2 kinds of caps. The one’s with the pressure written on them and the other kind that adjusts to the pressure once installed and I have not had an air leak problem with either kind.

It could be that ridding in the boonies on your bike put to much strain on the cap where standard driving while pulling a camper would never go to that extreme.

It was stated in this thread that they loose air pressure and I have not found that to be a fact whereas you had a total catastrophic failure due to extreme use and that is a different issue. After reading of your problem, I too would not put them on a motorcycle or ATV.

One of the 2 manufactures at JCW.com state that should the top of their cap break off there will not be any loss of pressure however I do not remember which one stated that. It can be found out by going to the following link and researching the 2 brands on their respective home sites

http://www.jcwhitney.com/Tire-Valves-Stems...in_dim_search=1


__________________
Darwin Maring is offline   Reply With Quote
Old 03-20-2009, 12:12 PM   #10
Junior Member
 
Trailer: No Trailer Yet
Posts: 1
Hello all...

The pressure indicating valve caps which have a stated pressure or metal cap bodies may be the problem.

The Kleen-Wheels TireCheck brand, with nylon cap body, will not come loose and leak which is typically caused by temperature differentials between Shrader valve stem metal and the metal of the cap body.

Select and test TireCheck.



__________________
Stephen Slater is offline   Reply With Quote
Old 03-21-2009, 12:20 PM   #11
Senior Member
 
Name: Art
Trailer: Helite
Posts: 164
Quote:
The tire valve (Shrader valve) is designed such that the higher the pressure the tighter the seal. When you screw one of these things on the end of valve stem the Shrader valve is released. Then you no longer have the greater the pressure the better the seal. You have the greater the pressure the more likely the seal is to fail. The air pressure attempts to blow the seal apart. Not a good thing.
It's good to see that in todays spaaceage that technology has been able to develop a "CAP" that will screw on and keep the tire from leaking. Yes They Work so go forth and do something that makes your life safer.
__________________
Art VanDelay is offline   Reply With Quote
Old 03-21-2009, 05:05 PM   #12
Senior Member
 
John Hussey's Avatar
 
Name: John
Trailer: 2000 16 ft Casita Spirit Deluxe
Florida
Posts: 169
Quote:
I have used them for years on 3 vehicles and have found that they seal and do not leak. I have the ones that have the tire pressure on the top and they change from green to yellow to red if the pressure gets low and guess what, they are not changing. Due to the same post last year stating that they leak, I checked the pressure with a professional gage and found that the caps were correct.

I purchased mine from www.jcw.com and I saw them at WalMart.

Should you see them at WalMartt, look on the package to see if there is a statement concerning DOT approval.
I also use these Wal-Mart ones on two vehicles,with no regrets. If I knew where to find ones with 55 or 60 psi for my Casita & Kumho tiresI might buy them for it but I have metal stems and it just might stick out too far. I am a satisfied user. It is much easier to glance at the stem than to unscrew the cap and test with the gauge.
__________________

__________________
John Hussey is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tire Pressure Pat C Towing, Hitching, Axles and Running Gear 9 07-01-2010 02:38 PM
13' Scamp tire pressure Jeff Larsen Towing, Hitching, Axles and Running Gear 4 08-02-2009 03:58 PM
Tire Pressure Pete Dumbleton Care and Feeding of Molded Fiberglass Trailers 6 07-13-2007 06:37 PM
Tire Pressure Ron and Alma Care and Feeding of Molded Fiberglass Trailers 7 04-22-2006 05:01 PM
Tire losing air pressure. Legacy Posts Problem Solving | Owners Helping Owners 4 02-07-2003 01:55 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:13 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.