how much water does a PHII move per stroke?

[andy]

the lectra-san is working great but I might be pumping toooo much per flush. I think it calls for about 1 1/2 gal per flush.

 

[Dave Mauney]

Try this

I estimated the volume in the hose to the Lectran and filled the bowl that much water and pumped. For our setup it came out to be 8 full strokes. I then measured the outside of the Lectrasan and filled with that much water in the bowl and pumped. It comes out that we can pump the water through the hose and through the Lectrasan and through the outlet hose to the thru hull with 32 strokes. That of course doesn't mean we clean the Lectrasan out because of a lot of mixing, but it is a start. Hope that helps.Good WindsDaves/v DAMWEGAS

 

[Peggie Hall/Head Mistress]

Let me get this straight...

You've estimated how many pump strokes it takes to completely fill the Lectra/San, and that's how many times you pump the toilet after each flush??? "Total flush volume should not exceed 1.5 gallons." That's the MAXIMUM...not the minimum for each flush. Ideally no more than a gallon should go into it at a time, so that waste can be treated twice before it's pushed overboard. The Lectra/San has to be within 6' of the toilet. The toilet only needs to pumped enough to move whatever is in the bowl--whether it's a gallon or only a cupful--as long as it make it into the Lectra/San and isn't left sitting in the hose. It does not ever have to be cleaned out (cleaning the electrodes is a different issue) unless the boat will sit unused for an extended period--weeks or months, not days. Just run it twice before closing up the boat to let it sit between weekends, or even for a couple of weeks.Odor is a signal that waste hasn't been treated.

 

[Dave Mauney]

Empty the line

To Peggy's point for our inlet hose to the Lectrasan we pump 8 strokes per us to empty the hose into the Lectrasan.Good WindsDave

 

[Vic Willman]

PHII flushing volume

The PHII head moves between 6 and 8 oz of volume per stroke. Sanitation hose with a 1 1/2" nominal I.D. holds very close to 1 gallon for every six foot run. One gallon is 128 oz. Dividing 128 by 7 (average volume per stroke), comes to slightly over 18 strokes. So, based on that, emptying the bowl plus 18 addiitonal strokes of the pump should clear a six foot run of sanitation hose. If you should want to try the dry-flush method that Peggie touts, to clear the lines, pump in the wet flush position until the bowl's contents are gone then switch to the dry flush position and pump 18 more times per six feet of hose run.

 

[Peggie Hall/Head Mistress]

While it's a bit of a pain to pump that much

every time you flush, it is important to clear the head discharge line when closing up the boat...to prevent standing waste from permeating the hose.