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Old 05-05-2021, 08:15 AM   #1
Rivet Master
Mollysdad's Avatar

2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
Posts: 5,734
Blog Entries: 1
TST O-rings.

I was discouraged by the price TST was charging for a package of 6 replacement O-rings for their TPMS.
To be fair there's other stuff in there, tiny screws, gasket for the Schrader valve, but in general you're buying it for the 6 O-rings when you replace the batteries.
Don't get me wrong, I love the TST TPMS, but $9 for the O-ring set AND $11 to mail it baked my bagel.
So in the interest of science, ahem, I bought the set from TechnoRV, and after reading several forums determined that the
O-rings are 11 mm. x 1 mm. Amazon has a package of 100 for $8 with free shipping.
When they arrived, I photographed the two packages with a sample of each. The TST is on the left, China O-rings on the right. You be the judge.

BTW, I have the cap sensors so I can't swear the flow thru are the same.
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Old 05-05-2021, 08:26 AM   #2
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2017 20' Flying Cloud
Oriental , North Carolina
Join Date: Mar 2018
Posts: 58
Thanks!! I like my TST too, but those O rings...
Since I'm a Bambi, I use 2 a year...I'm good for 50 years!
Safe travels.
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Old 05-09-2021, 10:58 AM   #3
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2012 30' International
Walkerton , Virginia
Join Date: Dec 2003
Posts: 3,006
Thanks, Dad. I need to replace mine and I'll follow your lead. TechnoRV - this is not one of your brighter moments with me.

Somebody, please, point me to the road.

AIR 3987
WBCCI 4596
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Old 05-09-2021, 11:56 AM   #4
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2017 26' Flying Cloud
Moss Point , Mississippi
Join Date: Jun 2017
Posts: 187
I went through same decision over a year ago. Got the 100 ct from Amazon. No problems with them...
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Old 05-09-2021, 10:27 PM   #5
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2007 25' Safari FB SE
Plano , Texas
Join Date: Jun 2002
Posts: 158
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