11-12-2025, 07:26 AM
(This post was last modified: 11-12-2025, 07:54 AM by Euphoria38.)
(11-11-2025, 06:19 PM)Sovran39 Wrote: I recently purchased a 2011 Sovran 3900 and have a vacuum pump that continues to run and had the same reaction. Other than removing the holding tank is there a better way to get to the pump?
P1971.pdf (Size: 423.59 KB / Downloads: 15)
LPVG Parts List.pdf (Size: 175.79 KB / Downloads: 12)
[attachment=1572][attachment=1573][attachment=1572][attachment=1573]It is most likely the Duckbill Valves that need replacing. Part#385310076. You will need 4 in total. They sell them in 2 Packs. The second issue could be the Vacuum Switch. Part# As long as you are going through all the effort you may want to do both. You can purchase them through Environmental Marine. I have not had a meeting yet with my service department who will do the work. They are a full-service facility who can handle major work, but I hope they have a solution without removing the tank. I will post again when I meet with them in the next 3 weeks +/-. I have the Tiara instructions, but they were almost worthless that i can send.https://www.environmentalmarine.com
