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We used the pressure pro system on our 06 3400 from 2006 t o 2013 and the TST 507 on our 13 3402 from 2013 to the present. They both worked fine did not need a repeater and saved us from probable damage or worse on several occasions over the years. We went to the TST system because we needed new batteries for the pressure pro and got a good price on the TST system at the Tampa RV show for for less that the cost of the pressure pro batteries. IMO both are good systems.
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