Slow Flowing Hot Water
HW heater heats water via 120 volt or coolant from engine. Lately volume of
HW flow at faucets is very low; temperature of water is hot-only volume
affected. Cold water volume OK. Cleaned aerators at faucets and FW pump
seems to be working OK. Where is most likely site of constriction or?? Bob
Siegel 36'MT sundeck "Shalom" Annapolis
Bob,
I have seen household water heaters with plastic cold water fill tubes.
These are inside the tank and they direct the cold water to the bottom of
the tank. If for some reason a tank gets left on without a cold water supply
it is possible for the tank to get hot enough to melt this tube and restrict
the flow.
I don't know if marine tanks have this type construction or not. I suspect
not as they were found on heaters where the cold water inlet was at the top
of the tank. All marine heaters seem to have the cold supply at the bottom
so I expect no tube is needed.
If yours does happen to have the cold inlet at the top, this could be the
problem.
Another possibility is that there is a strainer in the cold water supply
line just before it enters the tank. If so that could be clogged.
Good luck,
Bill
HW heater heats water via 120 volt or coolant from engine. Lately volume
of
HW flow at faucets is very low; temperature of water is hot-only volume
affected. Cold water volume OK.
Bob,
Been there , done that.
Calcium build up, use a product called CLR. ( Calcium , Lime Rust)
remover. It is a liquid and I got it a a local hardware store. Flush the
heater with it.
CCC
M/V CC RIDER
CHARLES C. and PAT CULOTTA, Jr.
Patterson, La.
http://www.geocities.com/charlesculotta/
Most of not all water heaters have a dielectric fitting on the hot output
side. They do their job and corrode over time, assumably saving the tank,
(I am not a plumber). I learned about this when the day before Christmas
last year water began running across the carpet on the boat! 1 hour to
gain access to the heater and found a fitting corroded almost off the top
of the tank. I couldn't get the old fitting out of the tank so I called a
plumber. He arrived and pulled the fitting with a huge pipe wrench. The
"fitting" was the dielectric and after getting it out I understood why the
hot flow was less than the cold. It was almost corroded completely shut.
Hope my experience helps.
Mike
At 05:21 PM 9/20/2004, Bob/Myrna Siegel wrote:
HW heater heats water via 120 volt or coolant from engine. Lately volume of
HW flow at faucets is very low; temperature of water is hot-only volume
affected. Cold water volume OK. Cleaned aerators at faucets and FW pump
seems to be working OK. Where is most likely site of constriction or?? Bob
Siegel 36'MT sundeck "Shalom" Annapolis
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Mike Cowan
MV Sue's Pool III
65 Hatteras LRC hull #2
Off-List email: mikec@wirelessconnections.net
Got into this thread very late, so will ask only one question: Does the
slow hot water delivery occur at every sink it is plumbed to? If the slow
hot water occurs at only one faucet, but not all, then it's probably not the
tank. If it appears at all of them, it may very well be.
Bob Peterson
47' Lien Hwa CMY
"Lopaka Nane"
San Francisco
-----Original Message-----
From: tMike Cowan
Sent: Monday, September 20, 2004 5:54 PM
To: trawlers-and-trawlering@lists.samurai.com
Subject: Re: T&T: Slow Flowing Hot Water
Most of not all water heaters have a dielectric fitting on the hot output
side. They do their job and corrode over time, assumably saving the tank,
(I am not a plumber). I learned about this when the day before Christmas
last year water began running across the carpet on the boat! 1 hour to gain
access to the heater and found a fitting corroded almost off the top of the
tank. I couldn't get the old fitting out of the tank so I called a plumber.
He arrived and pulled the fitting with a huge pipe wrench. The "fitting"
was the dielectric and after getting it out I understood why the hot flow
was less than the cold. It was almost corroded completely shut.
Hope my experience helps.
Mike
At 05:21 PM 9/20/2004, Bob/Myrna Siegel wrote:
HW heater heats water via 120 volt or coolant from engine. Lately
volume of HW flow at faucets is very low; temperature of water is
hot-only volume affected. Cold water volume OK. Cleaned aerators at
faucets and FW pump seems to be working OK. Where is most likely site
of constriction or?? Bob Siegel 36'MT sundeck "Shalom" Annapolis
http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering
To Unsubscribe send email to
trawlers-and-trawlering-request@lists.samurai.com
Include the word Unsubscribe (and nothing else) in the subject or body
of the message.
Mike Cowan