Originally Posted by 3'senough
I went with the TST 507 Flow Through system and it's been great. Saved me once so far with a low tire. I changed over the valve stems to metal as the rubber factory were leaking when you added the sensor. Some have success running stock stems others don't. It's different for each rim. You might loose 2-5 psi over the course of a day running with the rubber stems. If I flexed my rubber stems without the system you could hear it leaking so I went to all metal.
With my unit I do not need a repeater and it's every bit of 40ft ft from the unit to the rear most sensor. Also with the 507FT I take off the sensors when parked to save the batteries. The 510 have a 5-7 year battery that is sealed and must be replaced by TST for $20.00 each.
Mine was ordered from Plug it Right who extended the warranty to 3 years on the system.
I have had the 507 system with standard sensors for over 5 years. I too take the sensors off the tires when parked for an extended period of time to save the battery life since pressure turns the sensors on. My 5'er is a hair under 38' and no booster has ever been needed. I have had one sensor fail in during this period and TST replaced it even after almost 5 years. I purchased a 2 pack of sensors so I will have a spare if needed.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof