Join Date: Aug 2009
Location: Rocky Mountains Front Range
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It will work under d2 pump pressure at purge, but I would do what T-boy has advised, for two reasons.
First, my return/PV is plumbed to the top and I had a Delrin purge valve start failing slow after 20k, with a pretty constant drip. No big deal when running veg as it just cycled veg, but I did a bunch of intown short trip driving on d2 with a ton of idling and in my system config, this was putting a constant drip of d2 into the veg tank...almost overflowed the bugger... only thing that saved me was I "heard" the drip when I was trying to figure out why I had more 1/4 tank more of veg in the tank than I should have.
Second, is a personal one, but I didn't want an opening into my 100gal tank below oil level without a manual valve "closed" in all cases. If a hose failed or something stupid happened to the return line config, you dump the entire oil load. This is not from experience, but this is the reason I plumbed mine to the top because we are relying on a 12v PV to hold back the load of oil and hoses/fittings break...o-rings fail.
2005 Excursion 6.0l Eddie Bauer, 175k