The last few times I have filled my aft water tank without filling the forward water tank, I have run into problems maintaining water pressure when I open a faucet.   So while I may have a full tank of water in my aft water tank, the faucet spurts out water and air like I am low on water.   If I fill the forward tank I don't have this problem.  The pressure is fine and the water comes out of the faucet without spurting air/water mixture.  Anyone else encountered this phenomenon?


s/v Plan B

Views: 187

Replies to This Discussion


Have you checked that the valve that close/open the pipe to the fwd tank on the manifold is closed? The manifold wthe the valves is located in the space next to the water boiler (in the sofa)



Are you suggesting that in order for the water tank in the aft cabin to work properly the forward tank valve located on the manifold must be closed when the forward tank is empty?  I thought the system was designed to send water to the manifold no matter what tank was full or empty.

You have two options: either fill both tanks and keep both valves open or use one tank at a time and close the valve of the other. Otherwise you are pumping air to the empty tank and naturally lowering the pressure. I used bothe options over the years. It is easier to control water consu potion when you open one valve at a time even when both tanks have water in it..


Correct. Tevfik has got it right. I am always running the system with only one valve open in order to keep track on consumption. It also helps me keep track on the state of freshness of the water. I prefer to empty one tank before it is filled up again. 


I have a 2011 Ben 40. When I use my water tanks I alway close the valve to the tank I am not using. My valves are located under the starboard seat just forward of the head. You may be drawing air into the pump from the empty forward tank. I always draw down the forward tank first to increase sailing performance and then turn its valve off and the aft valve on. 

Just a thought.



Latest Activity

Mike Brown replied to Harry's discussion Finding and Preventing Problems in the group Beneteau 40 & 43
"Harry, thanks for sharing the info on your two problems and fixes. Fortunately I haven't seen the mainsail fuller issue. I have seen the shower sump problem though. On my boat pulling and reinserting the red/hot lead at the box under the sink…"
16 hours ago
Mike Brown replied to Robert & Sandy's discussion YANMAR 4JH5E GEAR SELECTION PROBLEMS in the group Beneteau 40 & 43
"Robert, thanks for the update, glad all is well. As for lapping the gear box cones in such a short period of time I still have my doubts about it. Just remember not to fix something that isn't broke.  Mike"
16 hours ago
Robert & Sandy replied to Robert & Sandy's discussion YANMAR 4JH5E GEAR SELECTION PROBLEMS in the group Beneteau 40 & 43
"Morning SeaKnots team, especially Mike. Well Liberte been has slipped, antifouled and polished and most importantly the Gori feathering three blade prop has been serviced. Surprise, surprise there was quite a bit of coral growth in the gearing, not…"
John Hanrahan posted a blog post

Beneteau 43 two cabin slip covers

We are taking out cat Genny to the Bahamas this year and I am fearful of the beautiful white leatherette salon cushions.  If anyone has had cushions made could you please give us a name of the maker.  We can make them ourselves if we had the dimensions but would be happy if there was a custom supplier.  The boat is in the Abacos and we are in Halifax so we can't go and measure.Many thanks, JohnSee More
James Taylor replied to Larry Witty's discussion B43 Inverter Buzzing/humming noise in the group Beneteau 40 & 43
"I looked at the Beneteau USA site under electrical and did not see the transfer switch on your boat in their images of factory installed equipment ( see below) so I'm assuming the transfer switch was installed as a part of the inverter…"
Nov 18
Edward Hart posted a status
"Stopped in Norfolk. New diesel running fine."
Nov 14
Larry Witty added a discussion to the group Beneteau 40 & 43

B43 Inverter Buzzing/humming noise

Hello -Have a 2008 B43 hull 40 which I purchased second hand about a year ago. been very happy with the boat but have 1 annoying problem I would like to resolve. When switching on the inverter I have the following 2 potential issues:1) Voltage display is low, shows between 102-106 volts2) Humming noise coming from some sort of auto switch which is encased in a white plastic box behind the cabinet where the radios are mountedI only have the problem when the inverter is on, no issue with shore…See More
Nov 10
Edward Hart posted a status
"Hooligan is now back in the water with a new diesel and we are heading down the ICW from Annapolis to Jacksonville."
Nov 7

© 2015   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service