rob2020
Full Member
Posts: 39
Jeanneau Model: 2018 NC 795
Home Port: NewburyPort Ma
Country: US
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Post by rob2020 on Aug 21, 2020 20:24:59 GMT
Look to change Toilet/head water fill. any one change from using raw water. filling toilet bowl from on board fresh water tank. Previous boat toilet filled from fresh water . reason odder control. I due Know I need some sort of one way check valve in line from Fresh water tank. Pictures would be appreciated .
Sorry new to Jeanneau Many Questions Previous Boats Sea Ray Sundancers
Thanks ROB
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Post by Mistroma on Aug 21, 2020 21:14:32 GMT
I put in 2 T-pieces and a connecting hose with a valve between the inlet and basin outlet.
It works well as I can flush with fresh if required. The valve in the connecting hose is normally off. I only need to open it, close the basin outlet, close the head inlet and run some fresh water (+bactericide if required) into the basin. Flushing draws the fresh water through the system.
It is cheap, easy to install, simple to use and uses very little fresh water. Very safe as there's no direct connection between fresh water tank and heads.
I usually live on my boat from April/May to October and only flush with fresh every 6-7 weeks. Weekend sailors would probably need to flush with fresh water before leaving their boat at the end of the weekend.
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rob2020
Full Member
Posts: 39
Jeanneau Model: 2018 NC 795
Home Port: NewburyPort Ma
Country: US
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Post by rob2020 on Aug 21, 2020 22:45:04 GMT
Hello Thanks for the response . If you have pictures ?
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Post by Mistroma on Aug 21, 2020 23:19:03 GMT
I don't think that I have pictures but they wouldn't show much as everything is hidden away inside a locker. Plumbing is easy, I drew a very rough diagram and hope it is of some help. Just click on the thumbnail below for more detail. Attachment DeletedWater for flushing comes from basin after opening the new valve and closing the original outlet and inlet valves.
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rob2020
Full Member
Posts: 39
Jeanneau Model: 2018 NC 795
Home Port: NewburyPort Ma
Country: US
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Post by rob2020 on Aug 22, 2020 22:59:37 GMT
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Post by MalcolmP on Oct 28, 2020 14:15:43 GMT
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Post by alenka on Oct 29, 2020 9:18:41 GMT
Can I ask what safeguards are in place to stop bacteria going back along the lines from the head and into the basin and or fresh water holding tanks?
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Post by jy51 on Oct 29, 2020 9:54:30 GMT
Can I ask what safeguards are in place to stop bacteria going back along the lines from the head and into the basin and or fresh water holding tanks? In a fresh water feed toilet system, the water supply hose is fitted with a one way valve, only allowing water to flow in one direction.
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Post by Mistroma on Oct 29, 2020 10:37:15 GMT
Can I ask what safeguards are in place to stop bacteria going back along the lines from the head and into the basin and or fresh water holding tanks? A one-way valve would be required for connection to fresh water tanks. I don't have a one-way valve in my system because risk of contamination must be close to zero. 1) The connecting valve is always off unless I'm pumping water from the basin to the flush. It is used very infrequently and there's no chance of forgetting to close it as the heads would not flush. 2) Syphoning isn't possible from bowl to basin Flush points are at top of bowl and bottom of basin is above flush points. You would have to completely fill the bowl in order for water to reach the flush points and be sucked back to the bowl. It could come via a leak in the pump but would still have to move uphill. Water only wants to run downhill, outlet in a syphon must be lower than the inlet. 3) Connections are high up, well above the waterline This is a matter of reducing the risk of a leak. I fitted the connecting valve almost level with the top of the basin and the second T-Piece is a little higher up. The pipe could leak when very well heeled but water would be slopping out of the basin by then. The other T-piece is pretty close to the level of the basin. The original existing hose curves around and slightly upwards before twisting back to the skin-fitting. I could not see any advantage to fitting a one-way valve in my system. I can't contaminate my water tanks as there isn't a connection. Risk of leaks or contaminating the basin are negligible (i.e. you would need to do something to deliberately push water uphill). I did a quick edit to my diagram to make physical location a little closer to the actual installation. I hope that this helps. Attachment Deleted
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