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On 12/1/2020 at 9:19 AM, Troy. R said:

Not sure if this will be helpful to any of you, but attached are schematics and Bill of Materials for the install I did on my '07 Avy years back. I also included some pics.

http://www.centurioncrew.com/applications/core/interface/file/attachment.php?id=13013

http://www.centurioncrew.com/applications/core/interface/file/attachment.php?id=12972

Also, I don't recall who asked, but earlier in the thread someone asked why Centurion used the Impeller pump to fill and aerator to drain instead of using impeller pumps to fill/drain each tank. This was a cost saving measure. They would use a single impeller pump with the sprinkler valve setup to fill, but that system doesn't allow for easy draining back through the sprinkler valve, so they used the aerator pumps to drain.

In newer boats Centurion/Supreme uses multiple impeller pumps (one per bag/tank) to fill/drain through the same thru-hull. For example, my ZS232 has 8 Ballast Puppies each on its own dedicated thru-hull.

Not sure how I missed this before but this is very helpful Troy.  I was planning to fill my center tank and both rear bags with the factory ballast puppy but now I have a new idea.  I am planning to add an aerator pump to fill the small center tank since it has a 5 pin switch wired for a fill pump and drain pump.  That will allow me to keep that existing switch and have a switch dedicated to that tank which is the only one I need for wakeboarding.  For surfing,  I will then use the ballast puppy to fill and drain both bags (at least for now).  I plan to drain both bags back through the bottom of the hull although I did consider going through the side like you did.  I plan to vent the port bag to the center tank drain line and the startboard bag to the bilge drain line.  This gives me a separate port for overflow of each bag.  My diagram is not as fancy as yours but you can get the idea of my proposed setup.

20201222_145549-d.jpg

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Troy. R    168
3 hours ago, 2010 Elite V Oldman WB SS said:

Not sure how I missed this before but this is very helpful Troy.  I was planning to fill my center tank and both rear bags with the factory ballast puppy but now I have a new idea.  I am planning to add an aerator pump to fill the small center tank since it has a 5 pin switch wired for a fill pump and drain pump.  That will allow me to keep that existing switch and have a switch dedicated to that tank which is the only one I need for wakeboarding.  For surfing,  I will then use the ballast puppy to fill and drain both bags (at least for now).  I plan to drain both bags back through the bottom of the hull although I did consider going through the side like you did.  I plan to vent the port bag to the center tank drain line and the startboard bag to the bilge drain line.  This gives me a separate port for overflow of each bag.  My diagram is not as fancy as yours but you can get the idea of my proposed setup.

20201222_145549-d.jpg

Do you plan to add check valves to the 2 lines that you are using as reuse for venting?

If not I would recommend it.

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19 hours ago, Troy. R said:

Do you plan to add check valves to the 2 lines that you are using as reuse for venting?

If not I would recommend it.

I was thinking I could get away without them if I used wyes instead of tees.  Then again, since the port bag is on the same line as the center tank drain pump, and the port bag is on the bilge pump drain line, I may have to add them.  If I can access the vent/overflow line for the center tank, I may vent the to bags to that same line and use wye fittings.  I don't think it would be necessary to have the check valves in that case.

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