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Old 10-22-2015, 12:33 PM   #1
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TPMS TST 507 flow thru or not

Some day when we get our new coach we want to get a tire pressure system and we have it down to the TST507 but can't decide on flow thru sensors or just the regular sensors.. Advice would be appreciated.. pros and cons..

I would think it would be easier to add air and not have to take the sensors on and off all the time but I am just guessing
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Old 10-22-2015, 12:46 PM   #2
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Either one. If I did it again, I would get the internal ones.
But I went with the non flow though.
I flow though ones seemed to stick out more than the non.


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Old 10-22-2015, 12:58 PM   #3
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I started with the regular one on my first system.
When I bought my second system I bought the flow-thru one and for my motorhome its makes it a lot easier to check and fill with no removal like in my first system.
So I say get the Flow-thru ones.
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Old 10-22-2015, 01:19 PM   #4
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I compared both and chose the non-flow through.

As mentioned the flow through's stick out more and weigh more.
My unit doesn't have the metal valve stems (yet) and I didn't want the weight of the flow through's hanging off my rubber stems.

The non flow through also have a removable anti-theft 'cover' that can be removed to make them even smaller and lighter. I did that and added the metal stem covers SOLD HERE to make them stable. Very little flex now!

I would like to see more information on the specs/range of the internal ones as they would eliminate all the exterior sensor concerns (weight/theft/stick out too far, etc.) but I don't see much listed about range.

One other thing.... I see a lot of posts from people saying they bought the flow through's because they didn't want the hassle of removing the non-flow through type to be able to air up the tires. With the opportunity for dirt or water to get into the sensor, I surely wouldn't run the flow through's without a valve stem cap on them.

If you remove the anti-theft device as I did, it isn't any harder nor does it take any more time to unscrew the non flow through than it does a cap.

If the concern is theft... I am probably at the wrong campground but if so... it takes all of 10 seconds to remove them and stow them somewhere safely and saves the battery too as they shut off when removed!
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Old 10-22-2015, 01:57 PM   #5
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Truck and trailer here, but I like the flow-through ones because I'm lazy when it comes to tire inflation time.
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Old 10-22-2015, 02:08 PM   #6
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I think it is what you prefer. The weight difference is really slight so that's not a concern. You can get the 507's which you might have to put a new battery in yearly, or the 508's which the battery is changed every 5 years, but I do think you have to send them in to get that done. No matter which you get you should put metal stems in, TST will tell you if your rubber stem is only 1/4 " exposed that you really do not need the metal, but I think it's best. Your tires did not come balanced from the factory. If you are using them on original tire. If you get new tires have them balance the tire with them on.
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Old 10-22-2015, 02:18 PM   #7
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Quote:
Originally Posted by gljurczyk View Post
Your tires did not come balanced from the factory.
I know that's true of trailers; but what about motorhomes (which we're in the Georgetown MH forum)?
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Old 10-22-2015, 03:04 PM   #8
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Quote:
Originally Posted by ependydad View Post
I know that's true of trailers; but what about motorhomes (which we're in the Georgetown MH forum)?
Good Question, and everyone that answer except Iggy owns TT. I think they put beads in them, but not sure.
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Old 10-22-2015, 06:24 PM   #9
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Well it sounds about 50/50 but Iggy has the motorhome so I am trending his way.. I will wait and see what kind of valve stems I have to work with first.. The kit does come with caps for the flow thru so dirt will not be an issue..
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Old 10-22-2015, 06:37 PM   #10
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Keep in mind that motor homes have dualies and wheel simulators that also come into play. Call the TPMS manufacturer as some have kits designed for certain rigs, as did mine.
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