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 Engines, Electric, Plumbing, etc.
 Fresh Water system has low pressure at faucets
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Author Previous Topic: Cooling Issue- Advice Needed Topic Next Topic: How do you winterize you AC  

GregR

RO# 33547



Posted - Nov 04 2017 :  09:29:30  Show Profile  Reply with Quote
Bought the boat this time last year. During survey there was low pressure at the faucets, like a dribble, and the fresh water pump would not shut off. Fresh Water pump was replaced as part of the sale. This helped but the pressure was still weak and the pump ran for a long time anytime I turned a faucet on. Boat then went into storage for the winter.

This spring I found a leak in one of the fresh water lines in the engine compartment and repaired it. Slight improvement. Pump would still run for a while anytime I turned on a faucet though. I noticed water on the swim platform when the pump was on, did some looking, discovered the source was the dock water regulator/filler, so I replaced that. After replacing this the pump would run for a only few seconds when turning on a faucet (this was good), then stop, so it felt like the problem was resolved. I get an initial good surge of water, then a dribble again though.

Everything works great when connected to dock water.

It's an issue now because I need to winterize the fresh water system and I don't have enough water flow to do so.
Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA

pdecat

RO# 842



Posted - Nov 04 2017 :  09:34:28  Show Profile  Reply with Quote
Check the inlet side for blockage. There is usually a screen filter that gets plugged.

Bruce



Homeport: Gulf Coast FL Go to Top of Page

GregR

RO# 33547



Posted - Nov 04 2017 :  10:18:44  Show Profile  Reply with Quote
Thanks, yup I pulled the screen and cleaned it out, same result.

Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA Go to Top of Page

pdecat

RO# 842



Posted - Nov 04 2017 :  10:40:28  Show Profile  Reply with Quote
flush some water back into the tank from the pump inlet side.

Bruce



Homeport: Gulf Coast FL Go to Top of Page

GregR

RO# 33547



Posted - Nov 04 2017 :  11:31:50  Show Profile  Reply with Quote
You are suggesting disconnect the hose from the tank to the pump, at the pump, and then push some water thru from the pump to the tank? Makes sense, if there's a clog there. Could I use an air compressor as well?

Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA Go to Top of Page

pdecat

RO# 842



Posted - Nov 04 2017 :  13:59:57  Show Profile  Reply with Quote
Yes, an air compressor at low pressure should work as well.

Bruce



Edited by - pdecat on Nov 04 2017 14:51:11

Homeport: Gulf Coast FL Go to Top of Page

Audrey II

RO# 30499



Posted - Nov 04 2017 :  19:07:36  Show Profile  Reply with Quote
It could be a spider nest in the vent as well. If it can't suck air it can't push water. to test remove the filler cap if it works better replace the cap and blow out the vent line.

Dave

“Time you enjoyed wasting is not wasted time.” – T.S. Elliotcommon.
-----------------------------------------------------------

1996 440 Trojan Express

Homeport: Haverstraw, NY Go to Top of Page

32carv

RO# 24150



Posted - Nov 05 2017 :  07:48:58  Show Profile  Reply with Quote
I would bet on the clogged vent but is there a cartridge water filter? If so it could be clogged.
Jim



Homeport: Sacandaga Lake Go to Top of Page

PascalG

RO# 12212



Posted - Nov 05 2017 :  08:11:33  Show Profile  Reply with Quote
I doubt it s a clogged vent as you notice it when filling the tank

If flexible hoses there could be a pinched hose, or someone could have replaced a hose with cheap stuff that collapses.

Inlet screen, pre filter before the pump, leak on the suction side.

Or it could be the pump. Are you sure it was replaced? New stands for Never Ever Worked anyway :).

Finally, check the voltage at the terminals with the pump running


Pascal
1970 Hatteras 53 MY
26' Starfish sloop
12' Westphal Catboat
16' Hobie Cat
13' Sandbarhopper

Homeport: Miami, FL Go to Top of Page

GregR

RO# 33547



Posted - Nov 05 2017 :  08:25:33  Show Profile  Reply with Quote
I'm pretty sure it's not the vent, assuming this is the same as the overflow. When I fill it up good water flow comes out of the hull overflow.

The pump is new, I confirmed that.

I'll be back on the boat next weekend and will check all these. I plan to take my air compressor with me.


Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA Go to Top of Page

PascalG

RO# 12212



Posted - Nov 05 2017 :  10:36:02  Show Profile  Reply with Quote
What kind of pump? If a diaphragm pump check a piece of dirt preventing one of the valves from closing

Pascal
1970 Hatteras 53 MY
26' Starfish sloop
12' Westphal Catboat
16' Hobie Cat
13' Sandbarhopper

Homeport: Miami, FL Go to Top of Page

GregR

RO# 33547



Posted - Nov 05 2017 :  11:28:12  Show Profile  Reply with Quote
I'm not sure what brand/model. It's red and white if that helps. I'll be back on boat Friday.

Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA Go to Top of Page

Gregory S

RO# 2620



Posted - Nov 05 2017 :  21:04:47  Show Profile  Reply with Quote
Glad to see you're back Greg.


Homeport: Norfolk, Va Go to Top of Page

MichaelNJ

RO# 14778

Posted - Nov 06 2017 :  12:38:15  Show Profile  Reply with Quote
Did you check your aerators on your faucets? Just unscrew one and see what kind of flow you get. Mine build up some scale over time but if you are getting surge first then a drop in pressure, you have a different issue. It's easy to check though.

2006 Meridian 341 Sedan Bridge
Obsession

Newport Yacht Club, Jersey City, NJ

Flotilla Commander USCG Auxiliary Flotilla 42 1SR

Homeport: Jersey City, NJ Go to Top of Page

GregR

RO# 33547



Posted - Nov 06 2017 :  16:25:18  Show Profile  Reply with Quote
quote:
Originally posted by MichaelNJ

Did you check your aerators on your faucets? Just unscrew one and see what kind of flow you get. Mine build up some scale over time but if you are getting surge first then a drop in pressure, you have a different issue. It's easy to check though.



I did, cleaned all 4 of them, same problem.


Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA Go to Top of Page

GregR

RO# 33547



Posted - Nov 10 2017 :  13:12:49  Show Profile  Reply with Quote
I used my air compressor with 30 lbs of pressure, disconnected the hose at the water pump between the pump and the freshwater tank, blew air until I could hear bubbling in the tank, that fixed it

Formerly "MrsRobinson" on here
2000 Monterey 302 - current
2001 Regal 3780 - sold
1995 Sea Ray 330DA - sold
2004 Maxum 2400 SCR - sold
1996 Maxum 1900 SCR - sold

Homeport: Stafford, VA Go to Top of Page

pdecat

RO# 842



Posted - Nov 10 2017 :  14:25:19  Show Profile  Reply with Quote
Good, Thanks for the report.

Bruce



Homeport: Gulf Coast FL Go to Top of Page

MichaelNJ

RO# 14778

Posted - Nov 10 2017 :  16:54:47  Show Profile  Reply with Quote
Pickup tube must have been blocked with something. Maybe a piece of sealant. It may find it's way back there again if it didn't break up or dissolve.

2006 Meridian 341 Sedan Bridge
Obsession

Newport Yacht Club, Jersey City, NJ

Flotilla Commander USCG Auxiliary Flotilla 42 1SR

Homeport: Jersey City, NJ Go to Top of Page

32carv

RO# 24150



Posted - Nov 10 2017 :  21:31:02  Show Profile  Reply with Quote
Probably cleared either pickup tube or vent. Easy / cheap fix. Nice.
Jim



Homeport: Sacandaga Lake Go to Top of Page
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