Check the rubber joker valve in the discharge side of the pump...Same problem, different make of head (Groco) and the joker valve was the culprit.. Jack Fitzgerald HONEY C&C 39 TM Savannah, GA In a message dated 9/13/2012 8:47:18 A.M. Eastern Daylight Time, mike.h...@impgroup.com writes:
Steve We have had a similar problem on the 115 - also a Jabsco manual flush head. In our case the water was backflowing from the discharge hose into the bowl. Our solution was to over pump for approx 20 seconds on wet flush before pumping on dry flush. That way the backflow would at least be cleaner water! Mike -----Original Message----- From: cnc-list-boun...@cnc-list.com [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of OldSteveH Sent: Thursday, September 13, 2012 1:00 AM To: cnc-list@cnc-list.com Subject: Stus-List Head Trouble I've had this disgusting problem a few times and attributed it to someone over-flushing the head, but I think there's a problem with the head: After a few days post-pump-out the head has back filled with blackwater while sailing and once while at anchor. First few times this happened I chalked it up to a guest over-flushing, got it pumped and went on my way. The Jabsco head is 3 years old. The system was completely redone by previous owner. It was a very well done job, no mickey mouse stuff on the surface, all new hoses and recommissioned blackwater tank. I checked the Jabsco manual and all appears to be piped correctly. The last trip was the last straw. I had to go below every 10 minutes and scoop some very disgusting water out of the bowl and pour down sink drain otherwise it would have overflowed. After a couple of hours of this the shine wears off, believe me. So - my plan is to take out the pump/valve assembly and look for a failed seal. Should the head discharge hose-to-tank have a check valve in it? I think not because it would become fouled with solids. I'm aware of principles of siphoning but short of drawing a diagram I don't think siphoning is the problem. I can't think of anything besides a failed seal. Help! Steve Hood S/V Diamond Girl C&C 34 Lions Head ON _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
_______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
