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  1. #1
    Seasoned Camper
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    TST Flow thru or Cap?

    Want to get the TST TPMS when we get our XLS22RBE, i see they have the Flow thru style and the cap sensor style. My question is, is one better than the other, easy to use or more accurate? This will be our first TT so no experience with these on a trailer.
    Jason & Jamie
    2016 F150 Lariat Supercrew 4x4, 5.0L, 3.55
    2020 Imagine XLS 22RBE
    The Great PNW!

  2. #2
    Setting Up Camp Bad_dog's Avatar
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    I've read that flow-through was slower to fill. IDK, I have the caps.

    Sent from my old rotary phone using Tapatalk [emoji3513]

  3. #3
    Site Sponsor
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    Caps are good. Unless it’s stored in a bad location, just take the security covers off and it’s no more difficult than taking standard caps off.
    John & Kathy
    2014 F250 Lariat FX4 6.2L SBCC
    2014 Reflection 303RLS
    SW Indiana

  4. #4
    Fireside Member
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    Quote Originally Posted by Hitsman3 View Post
    Want to get the TST TPMS when we get our XLS22RBE, i see they have the Flow thru style and the cap sensor style. My question is, is one better than the other, easy to use or more accurate? This will be our first TT so no experience with these on a trailer.
    TST is an excellent system! Although, the flow-thru sound great, I went with the caps. I recall several review issues such as slow fill and a longer stem with greater chance of damage. I'm very happy with the caps.

    Whatever you get, make sure that you have the metal valve stems rather than rubber. Rubber stems can wear/leak due to the cap size catching more wind and creating stem movement (wiggle).
    2019 GD Imagine 2600RB
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    2018 Toyota Tundra SR5 Extended Cab
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    Southern Arizona - We're close to Tombstone and can see Mexico (Mt. San Jose) from our backyard.
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  5. #5
    Seasoned Camper
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    Ive used TST for several years on different trailers and now use them on my F450. The flow thru are definitely SLOW fill but will release air normally. I use the caps on my fronts and the flow thru on the rear duals. Caps are definitely easier to use if the valve stem is easily accessible. I removed the "security" cover off the caps for easy removal. Accuracy will be the same for both, it just comes down to which one works for your situation.
    2019 Momentum 351M, Disc Brakes, Roadmaster Slipper Springs/shocks
    2018 F-450 Ruby Red
    B&W 25K Hitch
    2015 H-D Road Glide CVO / B&W Biker Bar

  6. #6
    Site Sponsor
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    Hi all - I found this discussion via search. Just had this exact same question on flow thru vs cap. Are the flow thru types large enough to be concerned with the wheels they're putting on Solitudes? And I thought the metal valve stems are only needed w/ the flow thru and not cap style. Any more thoughts? Thanks!
    2021 Solitude 310GK: Linen/DP windows/gen prep/slide toppers/king bed/EOH disc brakes/Cooper-H tires
    2019 F-350: Lariat/CC/LB/Diesel/DRW/4x4/Bakflip MX4/B&W 20K/AirLift 5000
    Other stuff: TST 507 TPMS/2x BB batteries/Victron BMV-712/Champion 3500 dual fuel gen/Garmin 780 GPS/22" Blackstone

  7. #7
    Seasoned Camper
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    TST is an excellent system and has been serving us well. We have the caps and they work just fine.
    Regards, Bruce, Lin An, Kenji & Suki (Our two Akitas)
    2019 Solitude 310GK-R
    2015 Ram 3500 Big Horn CC, TD, Aisin Tranny, DRW

  8. #8
    Seasoned Camper
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    I moved from TST caps to TST flow thru's several years ago. They work great and the batteries are easy to change. Makes checking the air pressure really easy before I move the trailer out of storage.
    Kevin and Jennifer
    2016 RAM 3500 Laramie Mega Cab CTD Aisin 4x4 SRW
    2019 Reflection 28BH (Built 2/2019)
    - 78" Theater Seat, Second AC, Dual Pane Windows
    - Sailun 235/85 R16 Tires
    Blue Ox Super Ride BXR7200 with a Demco Factory Prep Bracket 6099

  9. #9
    Seasoned Camper
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    Quote Originally Posted by orbsah View Post
    Hi all - I found this discussion via search. Just had this exact same question on flow thru vs cap. Are the flow thru types large enough to be concerned with the wheels they're putting on Solitudes? And I thought the metal valve stems are only needed w/ the flow thru and not cap style. Any more thoughts? Thanks!
    I had high pressure metal valve stems put on when I changed to G rated Sailun's. I would use metal valve stems for any TPMS system to be on the safe side.
    Kevin and Jennifer
    2016 RAM 3500 Laramie Mega Cab CTD Aisin 4x4 SRW
    2019 Reflection 28BH (Built 2/2019)
    - 78" Theater Seat, Second AC, Dual Pane Windows
    - Sailun 235/85 R16 Tires
    Blue Ox Super Ride BXR7200 with a Demco Factory Prep Bracket 6099

  10. #10
    Fireside Member Bwood BBQ's Avatar
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    Quote Originally Posted by Kevin2282 View Post
    I had high pressure metal valve stems put on when I changed to G rated Sailun's. I would use metal valve stems for any TPMS system to be on the safe side.
    This! Definitely change out your valve stem. I have used the caps for about three years and have had no issues. I like them because they seem to be shorter than the flow through. Batteries lasted 2 years. Also when changing the batteries get their o ring kit and change them. Half of mine split when I took the cap apart.

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