Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-09-2011, 18:48   #1
Registered User

Join Date: Aug 2011
Posts: 8
Freshwater Pressure Problem

New to the community so I apologize if this is in the wrong 'section'. Just bought a 2003 Benneteau 311 and absolutely love her since the previous owner really didn't use her that much (2 trips last season) and everything is in good condition.....except the freshwater system. Obviously the freshwater tank had water sitting in it a loooooooong time and stunk to high heaven when we ran the taps. Sanitized the system per the USDA protocols (about 15oz of bleach in the filled freshwater tank, run all the taps until you can smell bleach and let sit for 1hr to kill all the grossness and then run the tank clean, refill with freshwater and flush the taps). Water smells normal but the problem is that I've got no pressure when running a single tap....it barely dribbles out. The water pump starts running as soon as you turn on a tap, have cleaned the filter which empties almost immediately after you turn on a tap. It seems that the water pump can't keep up a single tap. Any suggestions? By the way, not losing any water to the bilge, etc. Any thoughts and suggestions greatly appreciated!
__________________

__________________
jumperlee is offline   Reply With Quote
Old 05-09-2011, 19:01   #2
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,382
Re: Freshwater pressure problem

Did you get better flow before the bleach treatment? If so then either the cleaning exposed a leaked on the intake side of the system (between the tank and the water pump) or there is something clogging the lines between the pump and the faucet.

Easy test for the pump.

1. Turn off the power to the pump
2. Disconnect the output hose from the pump.
3. Turn the pump on briefly and see if water flies out.

OR

3. Turn on the faucet and blow into the faucet and see if you get air coming out of the hose where you disconnected it.
__________________

__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 05-09-2011, 19:01   #3
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Freshwater pressure problem

There is probably a strainer between the tank and the pump. Have you checked that. It could be in the pump housing.
__________________
DeepFrz is offline   Reply With Quote
Old 05-09-2011, 19:04   #4
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Freshwater pressure problem

Best bet in cleaning the tank is to get in there and scrub, then vinegar treatment and lots of flushing. There is another current thread running on that.

Water System Mayhem !

Maybe a mod will move this thread to the Plumbing Systems and Fixtures forum.

Excuse my bad manners. Welcome to the Cruisers Forum jumperlee
__________________
DeepFrz is offline   Reply With Quote
Old 05-09-2011, 19:26   #5
Registered User

Join Date: May 2011
Location: New Smyrna Beach, Fl
Posts: 105
Re: Freshwater pressure problem

Do any of the faucets work okay? If not my guess is your pump impeller or pump is bad. If you had alot of trash in the tank, you have pumped all of that in the lines or the pump. As stated above disconnect pump connection and see if it pumps.
__________________
C Skip R is offline   Reply With Quote
Old 05-09-2011, 19:39   #6
Registered User

Join Date: May 2011
Location: currently tenessee
Boat: cabo rico 38
Posts: 50
Re: Freshwater pressure problem

you mentioned that the pump starts as soon as you turn on a tap.
this implies that it wasn't running though it had power before you turned on the tap.
if that is the case then the pump must be building pressure and tripping out
the pressure switch unless it is also defective. If that is the case then you
likely have a blockage in the output line between the tap and the pump or
in the accumulator tank (if you have one) or in the small orifice in the pump where
most incorporate a backflow valve and pressure regulator together. Secondarily,
could still be in the input lines but it it is building pressure and shutting down that
would be my second guess.

Need some more info (what kind of pump, does the pump shut off again when the tap is closed? Try the aforementioned test of running the pump with noting on the output side.

i've been living aboard for over a decade and even my home ashore is off the grid
and uses
all 12V pumps for water supply and transfer. I find them to be very reliable
if they are kept cool (don't put them in a tiny box and run them into thermal shutdown) and if they are used. Letting them sit as yours has can do everything from
simply clog them to sucking the valves around backwards or causing them to leak and
in the worst case strip out the gears on the wobble plate in which case its pretty much trash.

luckily, good pumps are now phenomenal cheap compared to what they used to be.
I paid $400 for my first 4gpm water pump. Now I can get one that is more reliable,
smaller, and draws less power for about $150.

good luck

gello
__________________
gello is offline   Reply With Quote
Old 05-09-2011, 19:41   #7
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,772
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Freshwater pressure problem

look at your pressure water pump. mine did this--look at the clear area. there may be a bubble in that-- make that bubble goes away then try the water again
flow wont happen with an air bubble in the pump. it will start then stop. flustrating
zeehag is offline   Reply With Quote
Old 05-09-2011, 19:43   #8
Registered User
 
Duke 48's Avatar

Join Date: Sep 2008
Location: Western KY
Boat: Morgan 321, BELIEVE
Posts: 203
Re: Freshwater pressure problem

If you have loosened any connections between the tank and the pump you could be pulling air.
May have a partial plug between the pump and the faucet or the pump and the tank. Disconnect at pump discharge and check pump output.

If you have a foot pump w/ faucet attached to the line you could be pulling air through the foot pump's faucet. (I replaced pump diaphragms before I found this one.)
Duke
__________________
Duke 48 is offline   Reply With Quote
Old 05-09-2011, 19:52   #9
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,772
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Freshwater pressure problem

i bet this happened magically while nothing was being done, correct--is a thing that happens when you empty the tank completely--air comes into the pump. this air must be let out of the pump or it will not work.
your pump is not dead--it merely needs the air bubble removed. with water in the tank, lift the exit end of pump up higher than the intake and let the water run until the air comes out., easily done and no money paid out.
zeehag is offline   Reply With Quote
Old 05-09-2011, 20:17   #10
Registered User
 
Strygaldwir's Avatar

Join Date: Dec 2004
Location: Deale, Maryland
Boat: SeaView - Privilege 37
Posts: 1,020
Images: 5
Re: Freshwater pressure problem

I am not certain this applies, but my faucets all had an aerator/filter on the end of the faucet itself. They were plugged when I first got the boat. Unscrewing them and cleaning them out vastly improved my water pressure. Sometimes better to try the real simple things first.
__________________
Strygaldwir is offline   Reply With Quote
Old 05-09-2011, 21:07   #11
Eternal Member
 
Chief Engineer's Avatar

Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
Re: Freshwater pressure problem

Check the screens in each faucet head....I have seen many of thes get clogged....You can buy replacements at any hardware store
__________________
Chief Engineer is offline   Reply With Quote
Old 05-09-2011, 21:37   #12
Registered User

Join Date: Aug 2011
Posts: 8
Re: Freshwater Pressure Problem

Wow, simply amazed at the quick and thoughtful responses. Appreciate everything folks! A bit more information based on your responses: The water pressure sucked before I did the treatment which prompted me to sanitize the tank....thought that all the buildup may be causing the issue. Our tank is about 45 gallons, stored underneath the forward berth. Wanted to open it up but the top screw top wouldn't budge. An odd thing, but when I open the freshwater fill valve there's a 'sucking' sound like a vacum has been made...is this normal? Figure it is since the water pump pulls pressure but not sure. Thanks for all the help!!!
__________________
jumperlee is offline   Reply With Quote
Old 05-09-2011, 21:47   #13
Moderator... short for Cat Wrangler
 
sarafina's Avatar

Cruisers Forum Supporter

Join Date: Jul 2009
Location: San Francisco
Boat: Cal 28 Flush Deck
Posts: 5,559
Images: 56
Re: Freshwater Pressure Problem

check to see if the vent is blocked? Prolly runs up to the anchor locker and thru the cowl vent, if you have that set up.
__________________
Sara

ain't what ya do, it's the way that ya do it...
sarafina is offline   Reply With Quote
Old 05-09-2011, 21:56   #14
Registered User

Join Date: Aug 2011
Posts: 8
Re: Freshwater Pressure Problem

Forgot to mention in the previous post that the lack of water pressure affects all of the outlets (Head faucet, sink faucet, transom faucet). Sarafina: did pull out a bit of 'crud' from the vent but even before it seemed to be venting fine while filling (bit of 'gurgling' while filling the freshwater tank right?)
__________________
jumperlee is offline   Reply With Quote
Old 05-09-2011, 22:16   #15
Registered User

Join Date: Aug 2011
Posts: 8
Re: Freshwater Pressure Problem

Zeehag: So I would just unmount the pressure pump and turn it on its side to where the outlet valve is higher and run a faucet so the air can get pushed through?
__________________

__________________
jumperlee is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Send Over-Pressure Shore Water Over the Side with Pressure Valve ? sdowney717 Plumbing Systems and Fixtures 4 15-08-2011 19:36
Impeller / Sea Water Pump Problem in Volvo MD2040 hoaga Engines and Propulsion Systems 6 08-08-2011 14:59
Weak Freshwater Pressure hazegray Plumbing Systems and Fixtures 2 26-07-2011 09:24
Racor Fuel Filter Pressure Ajfowlie Engines and Propulsion Systems 13 15-07-2011 08:48
Problem Since 2.2.918 - Garmin Won't Work MarkJ OpenCPN 28 29-06-2011 18:40



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:51.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.