380 S2: Shore water intake conundrum

[Yot101]

I need some advice re shore water inlet use on a Lagoon 380 S2. There is a quick-fit hose connection on the sugar scoop which once plugged in, seems to make no difference to the water supply in the boat. If I turn the water supply stop-cocks off from the water tanks, I would expect that the shore water would automatically override the need for the water pumps to work. That's not the case.....I'm clearly missing something.....any advise would be appreciated.
Yoti101

[Tin Tin]

The shore water connection should push water through your lines with the electric pump turned off. You may have a blocked or corroded inlet valve assuming you are using compatible hose fittings.

[Yot101]

Thanks, I hadn't thought of turning the pump off completely. Will try that and let you know.

[Dockhead]

More than one yacht has been sunk at the dock by permanently connected shore water connections. I would not advise doing this. I would live off the tank and refill as necessary.

[NYSail]

My shore supply line ( never use) has a ball valve near the pump.... have to open to get water in.

[Draughty]

Hi Neighbor! I'm sure you'll sort it out on this forum.

Rgds

[Dockhead]

Originally Posted by NYSail

My shore supply line ( never use) has a ball valve near the pump.... have to open to get water in.

That's a good system. As long as you keep the valve shut when you're not actually filling the tank.

[Bill O]

On our previous boat I had it set up for a direct water hook up to the dock hose. It worked w/o the electric pump from the pressure in the system and there was a ball valve to isolate that portion of the water system from the boat pump/system.


The system I built had several safety features. After the inlet near the stern (inside the lazarette) it had a ball valve, then a water pressure regulator and then a large filter all before it entered the main system. Have seen a few boats go down at the dock from dock hoses not turned off when people left the boat. IMO the pressure regulator was a key element to avoid large pressure surges that could burst hoses.


Will agree, remembering to turn off the inlet water when you leave the boat is a primary safety factor. It has to be easy to get to and visual, as a reminder to turn it off. For this I added a valve to the end of the hose that went into the inlet (outside of the boat). Eventually it became ingrained to turn off daily when I left the boat. While you could turn off the main waster spigot, I wanted to prevent someone accidentally turning it on/leave it on when no one was one the boat.


As suggested the safest way is to not use the continuous dock hose hook up and only use you tank water system for water.

[AndyinAbudhabi]

I was using shore water for a while until my partner woke me up one morning and said the boat opposite us was sinking. Looking at the boat she was absolutely right! Apparently the hose for the outdoor shower had come off and started filling the boat..
We've since gone back to filling the tanks.

[wingssail]

Run off of your tanks with the electric pumps (or manual, if you prefer). Use the shore water hose to fill your tanks.

Two reasons:

1. Keep you boat primed for being away from the dock, don't get used to shore water pressure (no umbilical cords)
2. You can worry less about sinking your boat.

When we set up our boat we made sure there was NOTHING that would make us want to stay at the dock. NOTHING was better or more comfortable at the dock.

We went out a lot.

[amarinesurveyor]

I think you might find that the quick connect fitting at the stern, is an outlet for the wash down pump.