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In What Year Did Valterra go From Old Style to New Style Waste Valves  

Updated 06/09/2026 | Published 06/08/2026

Question:

which 3 replacement seals do I get for a Valterra valve on a 2020 Montana High Country fifth wheel the valve is concealed , only want to remove the panel once if possible old style or new style

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Expert Reply:

Hey Silas, starting in 2000 did Valterra move from the old style valve to the new style. So that means for your 2020 Montana High Country the correct seal kit would be the part # T1003-9VP as you for sure have the new style.

expert reply by:
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Jameson C
Bryan profile picture

Bryan

6/9/2026

having the right one or even both when the unit is concealed. Soak the bolts and nuts over night with WD 40 .Some times they get really grungy. Lube with plumber grease before assembly and change the whole valve not just the seal. Then cleaned the tank when out add a little like 1/2 cup cooking oil/virgin olive to the tank when it's empty and leave it there until you need to dump again..

Jameson C. profile picture
Etrailer Expert

Jameson C.

6/9/2026

@Bryan awesome tips!!

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