Freshwater system issue

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Average Joe

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Location
Chesapeake, VA
Model
Marlin
My 2020 Marlin has 5 freshwater outlets but I'm only getting water at 3, the bait prep station, cockpit shower, and FW wash down. The galley sink and head sink have no water.
Oh and I can get water to the toilet.

Any ideas?
 
Probably gunked up. I don't have this boat but have worked on my Islander water system. Start by downloading the owners Manuel from GW site. See if there are multiple feeds off the fresh water pump (parallel lines) vs a long run (series system). May be a combo of series and parallel. Finding the pump can be a challenge. Mine in under the steps into cabin.

If three are not working they are likely in series with each other. Take hose(s) off pump. Try to blow compressed air from non-working fixture back. Open non-working fixtures as you do this and check for air flow. Worst case take hose completely off fixtures.

Hot water working?

Good luck!
 
On your boat, do you have a water distribution manifold or all the lines interconnected?

Does each faucet have it's own shut-off?

You didn't mention if this is a new issue?

Assuming no WDM or shutoff and that it's a new issue... just like at home, remove the aerator and clean. That's the most likely culprit.
 
Hookup1 said:
Probably gunked up. I don't have this boat but have worked on my Islander water system. Start by downloading the owners Manuel from GW site. See if there are multiple feeds off the fresh water pump (parallel lines) vs a long run (series system). May be a combo of series and parallel. Finding the pump can be a challenge. Mine in under the steps into cabin.

If three are not working they are likely in series with each other. Take hose(s) off pump. Try to blow compressed air from non-working fixture back. Open non-working fixtures as you do this and check for air flow. Worst case take hose completely off fixtures.

Hot water working?

Good luck!
Click to expand...
I have the manual, it's no help. GW is sending me a plumbing diagram. Pump is under the stbd seat pedestal. I'm on the boat now at a marina, don't have the means to blow down.
 
DennisG01 said:
On your boat, do you have a water distribution manifold or all the lines interconnected?

Does each faucet have it's own shut-off?

You didn't mention if this is a new issue?

Assuming no WDM or shutoff and that it's a new issue... just like at home, remove the aerator and clean. That's the most likely culprit.
Click to expand...
 
I don't know how the lines run, GW is sending me a plumbing diagram.
All faucets are push-button operated.
I just bought the boat so I don't know the previous history.
The windshield washer worked too, just nothing at the galley and head sinks. I too the fixture off in the galley to see if that was the problem, still no water.
 
Most of the GW pluming does not have filters. Faucets might have screens. I have seen them clog. If you take the hose off the fixture you will know.

I'm thinking a clog in line for the series of fixtures that are not working. Without air you could try to backflush with water. Or snake with heavy 300lb fishing line back to previous fixture.
 
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Start by making sure your faucets are on. There is a push button at the end of the faucet that is a quick turn off valve. It is possible both are pushed off. Next would be the aeration screen as mentioned. Not sure how this would effect the toilet but that is where I would start. It is odd that all three would be blocked, it is a large feeder hose. Is the pump running when none of the faucets are on? If so, maybe a leak leading to those three items.
 
georgemjr said:
Start by making sure your faucets are on. There is a push button at the end of the faucet that is a quick turn off valve. It is possible both are pushed off. Next would be the aeration screen as mentioned. Not sure how this would effect the toilet but that is where I would start. It is odd that all three would be blocked, it is a large feeder hose. Is the pump running when none of the faucets are on? If so, maybe a leak leading to those three items.
Click to expand...
The toilet works, it's just the faucets.
The pump is running off and on. However, the bait prep station faucet is leaking badly so I'm not sure if that's why the pump is cycling or not.
 
Well you have tons of suggestion to troubleshoot the problem. Let's get some feedback!
 
Average Joe said:
The toilet works, it's just the faucets.
The pump is running off and on. However, the bait prep station faucet is leaking badly so I'm not sure if that's why the pump is cycling or not.
Click to expand...
The pump can cycle excessively both when there is a leak or when there is a partial blockage. That should only occur when using a fixture (some water flowing)
Fix the leak first and then work on the non operative fixtures.
 
Hookup1 said:
Well you have tons of suggestion to troubleshoot the problem. Let's get some feedback!
Click to expand...

seasick said:
The pump can cycle excessively both when there is a leak or when there is a partial blockage. That should only occur when using a fixture (some water flowing)
Fix the leak first and then work on the non operative fixtures.
Click to expand...
Thanks seasick, that's my plan at this point. Replace the bait station faucet that is leaking like a seive and go from there. Still waiting on GW customer service to send be a plumbing diagram.
seasick said:
The pump can cycle excessively both when there is a leak or when there is a partial blockage. That should only occur when using a fixture (some water flowing)
Fix the leak first and then work on the non operative fixtures.
Click to expand...
 
Average Joe said:
Hookup 1, I appreciate all the suggestions so far and have replied to every one of them. This problem has not been resolved yet.
Click to expand...
Help us help you! Did GW give you a plumbing diagram? If so can you post it? Want to know if they show water line branches off the pump and what fixtures are on each branch. My pump is midship and branches forward to rally sink, hot water heater (removed and bypassed) then to the head sink (saltwater head). It runs aft to cockpit shower.

I'm assuming you are not hooked up to dockside water source. Assuming you are filling your freshwater tank and pressurizing the system with the freshwater pump. Please confirm.

You say the water is leaking at the bait prep station. Can you replace the fixture or disconnect and cap it off for now? Would like to know if system will pressurize and pump will stop cycling. I have seen hoses push out of fixture connectors and pump water into the boat. This was from air pressure blowing out the system in the Winter. You won't see the problem until the Spring. Happens with dockside water pressure too. Could be broken hose but less likely.

With these boats you really can't see the hose runs - they are mostly hidden. You need to figure out how things are chained together and troubleshoot. Start at the pump and look for a manifold that splits the water from the pump and sends it in multiple directions.

Is this a weekend access project?

Let us know what you find.
 
If it is not that, then step 2 is to clear the aerator screens at the end of the faucet. The end screws off and you can run water through the screen backwards to clean it. Either one of those prevents faucet water. Start at the beginning before you re-plumb the entire boat.
 
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