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Old 12-11-2009, 09:55 AM   #15
Senior Member
Alpine Owners Club
Join Date: Dec 2001
Location: Las Vegas, NV
Posts: 1,100
To cure the RO reject water flow into the sewer system and stop the flow of city water into the house system on an Apex just a valve is needed. Below is a copy of scratchings I made of Lyle's Apex water system while trying to remedy these problems. I had planed to draw it nicely later, but haven't gotten around to it. Basil added the red labels. If you follow the water out of the pump, you will see where it goes to a tee, down to the house and up to a check valve. The check valve was added as the "first fix," I decided that a valve would work better and I think that Lyle has changed that now. The only time that the valve would need to be open, would be to run untreated city water directly to the house.


Dale Gerstel
Las Vegas, NV
Had: 2007 Limited SE 40fdts
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Old 12-11-2009, 02:04 PM   #16
Senior Member
Join Date: Feb 2005
Location: Livermore, CA
Posts: 157
Thanks Dale, makes perfect sense to me now (pipe diagrams always help when you are a Chemical Engineer!). I may have found a holiday break project, or two, as I also want to add the RO boost pump as others have done. Now my list includes; replace the APEX's tank sensors with the new ones from SilverLeaf, install a RO boost pump, Install a valve (possible a "good" check valve or ball valve), replace the batteries, and perform service on the engine and Genset including oil changes, filter changes and lube service. Should be done in a day or two!

2006 Alpine Apex 40 FDQS
2002 Jeep Grand Cherokee toad
2000 Vette for the track
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