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Old 29-09-2011, 19:41   #1
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Plumbing City Water into Boat's Fresh Water System

Is there a way to plumb city water into the boat so that I don't have to continuously cycle through my water tanks and refill them periodically? In other words is there a way to leave the hose hooked to the boat when at the dock?
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Old 29-09-2011, 20:22   #2
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Re: Plumbing City Water into Boat's Fresh Water System

Sure, it's easy. This is what you attach the supply hose to: Jabsco Water Pressure Regulator - 44411-1054
Then you put a Tee in your water system after your pump. Run a line, hose or pex tubing, to the tee from the inlet fitting. It's a good idea to turn off the dock water every time you leave the boat. If something failed while you were gone, the hose could put a lot of water into your boat.
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Old 29-09-2011, 20:40   #3
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Re: Plumbing City Water into Boat's Fresh Water System

yes there is. there are deck fitting available that you can affix to your hull or deck where a 'garden' hose can be connected. on the boat side of the fitting put a pressure limiting device, then a hose to a 'T' on the output side of your onboard water pressure pump. that's basically it.

my boat came set up with a dockside water inlet. i disconnected it and capped it off. fastest way to sink your boat at the dock is to hook it up to shoreside water and then have it blow a line somewhere and fill your boat up faster than your pumps can pump it out....
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Old 29-09-2011, 20:43   #4
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Re: Plumbing City Water into Boat's Fresh Water System

I hang one of these thru the companionway into the galley...



Move it out when we leave so as to not create a small ocean in the boat...
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Old 30-09-2011, 05:11   #5
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Re: Plumbing City Water into Boat's Fresh Water System

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Sure, it's easy. This is what you attach the supply hose to: Jabsco Water Pressure Regulator - 44411-1054
Then you put a Tee in your water system after your pump. Run a line, hose or pex tubing, to the tee from the inlet fitting. It's a good idea to turn off the dock water every time you leave the boat. If something failed while you were gone, the hose could put a lot of water into your boat.
Why would I run the city water after the pump? Wouldn't that stop the water from getting to the heater? Or would the heater be after the pump?
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Old 30-09-2011, 05:25   #6
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Re: Plumbing City Water into Boat's Fresh Water System

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Why would I run the city water after the pump? Wouldn't that stop the water from getting to the heater? Or would the heater be after the pump?
Excepting the water tank, all of the potable water plumbing is after the pump.
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Old 30-09-2011, 05:35   #7
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Re: Plumbing City Water into Boat's Fresh Water System

pump is just another water source, the source being the tank. The pump with pressure switch wont let water flow backwards into the tank. So the city water goes after the pump and pressurizes hot water tank and cold water lines.
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Old 30-09-2011, 05:51   #8
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Re: Plumbing City Water into Boat's Fresh Water System

Ooooohhhhhh I see now what you are saying, I just looked at some diagrams. Can you plumb in an additional T so that you can have the deck fill that is the regulator fill your tanks or does the fact that it is a regulator prohibit that from happening?
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Old 30-09-2011, 07:03   #9
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Re: Plumbing City Water into Boat's Fresh Water System

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Ooooohhhhhh I see now what you are saying, I just looked at some diagrams. Can you plumb in an additional T so that you can have the deck fill that is the regulator fill your tanks or does the fact that it is a regulator prohibit that from happening?
A regulator only drops the pressure a bit. It cannot "know" when the tank is full.
I work part time for the local Tow Boat US guy. Nothing sinks more boats than shore side water! Turn it off when you leave the boat for more than the hour or two it takes to fill a boat.
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Old 30-09-2011, 07:05   #10
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Re: Plumbing City Water into Boat's Fresh Water System

This really is not a great idea IMO. We have seen first hand a two of boats sink at the dock as a result of a failure in the water system, and know of several others. In addition, letting your water tanks sit for long periods of time will guarantee issues with your water which will spread to the entire system in a short period of time. The best solution is to use the water in the tank and turn it over often. We actually took both of the FW regulators off of both of our boats so we would not be tempted. We have had hose failures in our system on both boats over the years and it emptied our water tanks in the bilge but was limited to the amount in the tank. Your bilge pumps will probably not be able to keep up with a continuous flow from the city supply for a period of time. So why risk it just to not have to fill the tanks on a regular basis? Chuck
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Old 30-09-2011, 07:06   #11
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Re: Plumbing City Water into Boat's Fresh Water System

I'm not sure why you would want to put an inlet to fill your tank. I just stick the hose into the deck pipe and wait for water to come out the vent. If you want to be able to fill your tank by screwing a hose to the boat install another regulated inlet and put the tee between the tank and the pump. As much as I'd like to sell you two inlets, I really don't think this is a good idea.
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Old 30-09-2011, 07:19   #12
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Re: Plumbing City Water into Boat's Fresh Water System

Just another chance for something to go wrong. It will also show if there is any weeping at all with your system. Cracked inspection plates, bad hose, or clamps, etc. etc........i2f
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Old 30-09-2011, 07:26   #13
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Re: Plumbing City Water into Boat's Fresh Water System

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Originally Posted by unbusted67 View Post
Is there a way to plumb city water into the boat so that I don't have to continuously cycle through my water tanks and refill them periodically? In other words is there a way to leave the hose hooked to the boat when at the dock?
I would NOT: a friend of ours nearly sank his boat when one of the boat-side fittings let go and with the tap at the dockside open the boat started filling the bilges with fresh water.

Other than this, I have seen remotely (wired) controlled taps in local gardening store. Power off closes the tap, power on opens the tap.

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Old 30-09-2011, 08:12   #14
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Re: Plumbing City Water into Boat's Fresh Water System

It is an ok idea IF you remember to turn off the water each and every time before leaving the boat. You would also want to install a loud bilge alarm for when you are aboard if the boat starts flooding.
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Old 30-09-2011, 09:13   #15
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Re: Plumbing City Water into Boat's Fresh Water System

I found that explaining the advantages and convenience of plumbing shore water to the boat somewhat difficult and embarassing when the insurance adjuster was laughing his ass off.
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