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17-09-2010, 05:42
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#1
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Marine Service Provider
Join Date: Oct 2007
Boat: Endeavour 42CC
Posts: 1,182
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Air in My Water System
I thought I had this solved. I was always getting the water pump running and not stopping. No leaks in the system downstream of the pump. I finally redid all the connections in the intake side and the run-on pump and spitting stopped. The water pump would suck air from tiny gaps in the intake side of the plumbing and run continuously. Repairing the connections fixed that.
Until now. I think it put air into the system this time by running the water tank dry. But I've run about 200 gallons through since then and I still get spitting, gurgling, and some pump run-on (where the pump continues to run with no water flowing). I think I have air in the system, including the hot water tank, but running 200 gallons thru should have cleared the air out by now.
I have a new flo-jet pump, a new 1 gallon accumulator tank, a 6 gallon hot water tank. The water storage is the lowest point of the system and the hot water tank is the highest point of the system. I have a brass check valve on the input side of the hot water tank and a check valve at the output of the storage tank.
Again, the system worked very well for several months until I ran the water tank dry, sucking up air into the system.
How do I get the air out of the system?
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17-09-2010, 05:45
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#2
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Registered User
Join Date: Dec 2009
Posts: 2,959
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You have an air leak. Check everything again. Did you use any larger hoses on smaller barbs? (Naughty)
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17-09-2010, 06:08
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#3
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Marine Service Provider
Join Date: Oct 2007
Boat: Endeavour 42CC
Posts: 1,182
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Nothing changed since the system was working well except that I ran the tank dry. The system was working exceptionally well before that. Now I have air downstream.
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17-09-2010, 06:30
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#4
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Registered User
Join Date: Apr 2010
Location: San Diego
Boat: Grand Banks 36
Posts: 42
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Air pockets can trap on high spots both on suction and discharge. One solution is to run full flow with as many faucets open as possible to try and scour the air pockets out of their hiding places thru water velocity.
Either that or daddle is correct, you still have or recently acquired another air leak on the suction side.
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17-09-2010, 06:31
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#5
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Registered User
Join Date: Mar 2006
Location: Tampa Bay area, USA
Boat: Beneteau First 42
Posts: 3,961
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We have gone through the same ballony a few times and it can be very frustrating, In our case I found that air trapped in any of the yacht's lines had to be purged, including the line to the foot pump in the galley and the line from the hot water tank. On our boat it generally takes two or three tank refills before all of the air is expelled or disolved into the water itself.
FWIW...
__________________
"It is not so much for its beauty that the Sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
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17-09-2010, 11:12
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#6
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Registered User
Join Date: Aug 2007
Location: Clear Lake Marine Services - Seabrook, Texas
Boat: Gulfstar, Mark II Ketch, 43'
Posts: 2,359
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I may have missed it, but did you replace the pick up line going into the water tank. I has the same problem with my boat, but also had a bad diaphragm on a brand new pump .. GOOD LUCK
__________________
Formerly Santana
The winds blow true,The skies stay blue,
Everyday is a good day for SAILING!!!!
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17-09-2010, 11:33
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#7
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CLOD
Join Date: Jul 2007
Location: being planted in Jacksonville Fl
Boat: none
Posts: 20,415
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If you pumped the tank empty, are you sure you haven't clogged the pump strainer and it is barely pumping and that's why it runs all the time?
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17-09-2010, 12:30
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#8
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Registered User
Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,857
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I had a similar problem and it turned out to be that the new pump had to high a pressure. When I turned the pressure down everything worked great. I found the solution after I had replaced the accumulator tank and some other parts.
__________________
Fair Winds,
Charlie
Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
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17-09-2010, 16:00
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#9
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Marine Service Provider
Join Date: Oct 2007
Boat: Endeavour 42CC
Posts: 1,182
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I think it's air trapped in the lines. The pump does not run ALL the time, but it will start to run when running water and then Sometimes won't shut off. Very intermittent. I think I need to run & run & run water to flush water bubbles out of pockets. Hopefully.
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17-09-2010, 16:26
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#10
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
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I had to change the copper pickup tube in the tank. Easy to do, but drove me nuts looking for the source of the air in the water system.
I just unscrewed the pickup fitting, looked at the little pinhole at the halfway point, groaned, bought a bronze elbow and some copper tubing, drilled the elbow a little, brazed in the copper, cut to length........good for another 30 years.
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17-09-2010, 19:27
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#11
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Eternal Member
Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
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Start bleeding the syatem from the furthest fixture back towards the pump. Fore and aft. Bleed both hot and cold water sides.
Ensure that hotwater tank is full
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21-10-2010, 07:31
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#12
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
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Quote:
Originally Posted by armani
Hello, what a superb information providing from you. I like this so much. Today i know something different because of you as fresh air is a must to ensure the health of those who live in the house good ventilation is a must.
Thanks for this great sharing.
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What are you trying to sell!!!!
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22-10-2010, 04:02
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#13
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Marine Service Provider
Join Date: Oct 2007
Boat: Endeavour 42CC
Posts: 1,182
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since you brought it up...
I totally rebuilt the manifold for the two tanks, resealing every single joint. And it fixed it perfectly. No more problems at all...
for about 2 months. Then it started up just as bad if not worse. I think it's because the manifold is in the engine space. The heat is loosening the joints from expansion/contraction and eventually I get an air leak on the intake side.
So this winter I plan on moving the manifold out of the engine room. Big chore but hopefully it will work permanently.
Thanks all
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23-01-2019, 16:24
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#14
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Registered User
Join Date: Mar 2011
Location: Puerto Escondido/Loreto, Mexico
Boat: Ocean Alexander tri cabin 52'
Posts: 307
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Re: Air in My Water System
Wow. I am having same problem. Replaced pump twice. Pump runs constant. I turn it off at breaker when not needed. Ill have to check the supply side fittings.
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29-01-2019, 09:25
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#15
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Registered User
Join Date: May 2008
Location: Punta Gorda/Kentucky
Boat: PDQ 32 LRC
Posts: 508
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Re: Air in My Water System
Quote:
Originally Posted by gettinthere
I thought I had this solved. I was always getting the water pump running and not stopping. No leaks in the system downstream of the pump. I finally redid all the connections in the intake side and the run-on pump and spitting stopped. The water pump would suck air from tiny gaps in the intake side of the plumbing and run continuously. Repairing the connections fixed that.
Until now. I think it put air into the system this time by running the water tank dry. But I've run about 200 gallons through since then and I still get spitting, gurgling, and some pump run-on (where the pump continues to run with no water flowing). I think I have air in the system, including the hot water tank, but running 200 gallons thru should have cleared the air out by now.
I have a new flo-jet pump, a new 1 gallon accumulator tank, a 6 gallon hot water tank. The water storage is the lowest point of the system and the hot water tank is the highest point of the system. I have a brass check valve on the input side of the hot water tank and a check valve at the output of the storage tank.
Again, the system worked very well for several months until I ran the water tank dry, sucking up air into the system.
How do I get the air out of the system?
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Perhaps if you go sailing and open all the faucets this will help dislodge air pockets?
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