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Old 09-18-2016, 05:32 PM   #1
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What's Needed For Shore Fresh Water

I have what I would call a closed fresh water system. A water storage tank, 12vdc water pump pushing water out to the galley and head fixtures.
I have been wondering what I would need to do to use the dock water with presumably better water pressure and save running my pump and pulling from my water storage tank when at the dock?
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Old 09-18-2016, 05:58 PM   #2
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I am not a fan of that type of system due to its potential for major problems. If you go that route anyway a tee, valve, and backflow device would be needed. Tee in anywhere between the pump and the water heater intake line with a backflow device limiting any water from heading back towards the pump. Locate the valve on the line feeding the dock water.
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Old 09-18-2016, 06:09 PM   #3
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The easy way if you don't mind..is go to the Sureflow pump website...look up any pump and it install directions.

Usually it gives the basics for a solid system.

There are add ons that make the system easier to manage or safer...they are complications that are great if you understand theirvlimitations.

Not connecting to city water is 200 percent foolproof. If done correctly...you might be 99.99 percent not likely to sink yourself with city water...roll the dice.

I do...but I can see both sides...so a lot of times..I use the tanks when travelling, but when sitting forcawhile, I do use city water direct.
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Old 09-18-2016, 06:45 PM   #4
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Quote:
Originally Posted by Pgitug View Post
I have what I would call a closed fresh water system. A water storage tank, 12vdc water pump pushing water out to the galley and head fixtures.
I have been wondering what I would need to do to use the dock water with presumably better water pressure and save running my pump and pulling from my water storage tank when at the dock?
I would not directly connect to the dock water. Over the years have seen many boats with water damage and several sink. If you want higher water pressure buy a higher psi pump. 18 years we been a live aboard and have filled the tanks.
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Old 09-18-2016, 07:17 PM   #5
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In all my years living aboard and working USCG and working salvage...I have only heard of stories about boats sunk by city water....never personally saw or involved with one.

Can it happen? Sure, so can being sunk by a meterorite.

Maintain the system, and it is no worse than A/C raw water cooling systems or engine cooling, or saltwater washdown, etc...etc....

Sure it is higher flow, but with proper safeguards, it can be made as or even more safe than other sysrems.

Using only tanks a good idea? You bet, but for some boats with smaller tanks...done the right way....no big deal either.
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Old 09-18-2016, 07:46 PM   #6
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This is what you need if these guys haven't talked you out of the idea.
http://www.xylemflowcontrol.com/file...ator_Promo.pdf
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Old 09-18-2016, 08:04 PM   #7
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We use the dock water when along side and just turn the tap off when leaving the boat for any longer than a few hours.

I would suggest a Shurflow or similar inlet fitting with pressure reducing valve. We use a 60 psi one but you can get them at various pressures. From there just run a line to a T fitting in the pressure line from your pump. I would think you would have to make sure there is or place a non return valve somewhere in the supply line from the tank to prevent back flow.

We find it very convenient and just manage the risk as we live on board.
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Old 09-18-2016, 08:08 PM   #8
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It's funny that just last week I was on my buddies boat and he says, I think I hear water running. He checks both heads nothing. He moves his carpets and furniture, lifts an engine hatch and water is spraying everywhere. Run out shut off the city water. Simple fix, the hose had merely popped off the fitting on the inline filter from the city water connection and needed only to be reconnected and the clamp tightened. Had we not been on board it could have been another story. Most at our marina make it a point to shut off the city water hose when not on site and I think that is a wise move. I don't have one and am contemplating installing one same as you.
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Old 09-18-2016, 10:10 PM   #9
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We had a boat on our home dock that had the hose on his ice maker pop out of the fitting and he put four feet of freshwater in his master berth and engine room. He had to replace the genset and rewire the engine room.

On our boat, a SeaTech fitting cracked and our freshwater pump put 300 gallons of water in the starboard bilge alley, One more inch and our main wiring chase would have flooded. After clearing out items stored in the alley and pumping the water out of the boat, I had to rebuild two vacuflush generators because the motors were destroyed.

I would love to have higher water pressure in the galley but not enough to connect to the marina water supply expect when filling our tank. I also have water sensors in every compartment below deck now - any water above 1/2" sounds an alarm that can be heard from the dock.
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Old 09-19-2016, 12:11 AM   #10
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To hook your boat to city water safely you need to remember to shut off the water every time you leave the boat.

I have also heard of people using devices that shut off the water after a set amount has passed through it. Set it for say a hundred gallons and if something in the boat breaks, you're not likely to sink. You would need to reset it every few days. Here is an example of what I'm talking about.
https://www.freshwatersystems.com/p-...FURbhgodSnMLyg
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Old 09-19-2016, 06:00 AM   #11
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AS there is a sinking risk , a belt and suspenders concept should be used.

A quality water pressure regulator should be the first installed item behind the deck inlet.

A RV water pressure unit unit that is adjustable/rebuildable (not sealed) should be on the dock before your water feed hose.

IF your current delivery is too poor , perhaps a better pump is in order.

Many times the same pump head is used on a bigger more powerful DC motor for deck washing.

WE use this for FW and it seems to last "forever" even in a liveaboard high use setup.

Of course avoiding the low price items , and looking at a Headhunter style pump may cost 5-6X as much and 3X the power consumption , but dockside . who cares?
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Old 09-19-2016, 09:00 AM   #12
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My experience with the "City Water Inlet" components HopCar posted (thank you, BTW) is that I've had a number of them start leaking when the system is pressurized by the boat's internal pump.

Maybe the PO hooked them up wrong. Maybe (my suspicion) they weren't properly winterized. Or maybe they just have a limited lifespan. After replacing two, I've taken mine out of the system entirely. Now I'm looking for something else to cover up those two holes.

Something to think about before cutting new holes and adding components you may or may not end up liking.
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Old 09-19-2016, 09:13 AM   #13
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CaptTom brings up a good point. The inlets with built in regulators require big holes to mount them. Another way to go would be an inlet like the Sea-Dog 513110 and an inline regulator. Sea-Dog : Quality Marine, Industrial and Rigging Hardware
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Old 09-19-2016, 10:11 AM   #14
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Lots of reasons to not connect to shore water. Only reason I can see is if the storage tank is so small as to require filling every day or so. Although when in Georgetown, Bahamas, seemed like a lot of sailboaters would go ashore every day to fill 5 gallon jugs!!
But, there are devices available that will shut off the shore water supply in the event of a leak/flood. There are fully integrated electronic valves and also devices that connect to existing valve and mechanically turn the valve (Home Depot) to the off position. Both utilize water sensors that activate the valve controllers. Some are wireless, some not. The valve controllers require 110V power but it may be possible to hook up direct to shore power. Sort of a fail safe for live-aboards who are not home when the gremlins strike!!
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Old 09-19-2016, 10:21 AM   #15
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Originally Posted by HopCar View Post
To hook your boat to city water safely you need to remember to shut off the water every time you leave the boat. =WM2000B&gdffi=ff5c75bf59634981b5f1d9c11393bf6b&gd fms=54C7463E3E7942DB8FCE115D7D92AA4A&gclid=CN7a55r Tms8CFURbhgodSnMLyg
That doesn't account for the chance that some other boater will turn it back on thinking he is turning on a different hose.

I am in the "don't do it" camp. Just because someone posts that he has never heard of a boat sinking because of being connected to city water doesn't mean it can't or won't happen.

Boating means taking some chances for sure, but this is one chance you don't need to take. I fill my tanks, use the water and refill my tanks. No permanent connection and it works just fine.
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Old 09-19-2016, 10:40 AM   #16
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I would use a pressure regulater valve with preesure gage to safely supply dockside water to your boat. They are available at the big box stores.
I preferr to fill my water tanks.
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Old 09-19-2016, 10:52 AM   #17
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Nothing the matter with using the fresh water pump. That way you know it is ready to go when you are cruising. Do you have an expansion tank?
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Old 09-19-2016, 11:25 AM   #18
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In all my years living aboard and working USCG and working salvage...I have only heard of stories about boats sunk by city water....never personally saw or involved with one.

Can it happen? Sure, so can being sunk by a meterorite.

Maintain the system, and it is no worse than A/C raw water cooling systems or engine cooling, or saltwater washdown, etc...etc....

Sure it is higher flow, but with proper safeguards, it can be made as or even more safe than other sysrems.

Using only tanks a good idea? You bet, but for some boats with smaller tanks...done the right way....no big deal either.
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Old 09-19-2016, 11:28 AM   #19
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https://www.amazon.com/gp/aw/d/B003Y...-bL&ref=plSrch
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Old 09-19-2016, 11:38 AM   #20
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I would not directly connect to the dock water. Over the years have seen many boats with water damage and several sink. If you want higher water pressure buy a higher psi pump. 18 years we been a live aboard and have filled the tanks.
We have a low pressure 30 psi pump. The main reason as a live aboard to not waste water. 30 psi is good for 95% of our needs. Also we can hold 400 gallons but only fill 100 gallons as 100 gallons just in case there is a leek. Also when we leave for more than a day we turn the pump off.

Land dwellers waste and use far more than is necessary.
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