plumbing fittings?

JoeWhite · Aug 21, 2014

There may be air trapped in the pipes. let the water run out of each faucet for a while- hot or cold and see if it stops cycling.

miwallace · Aug 21, 2014

Do you have a manifold under the galley sink? You can turn each faucet off one at a time..

KD3PC · Aug 21, 2014

Jim D said:
I have a 2001 410 hunter that has red and blue color plumbing in it for the fresh water. does anyone know what the name of this product is and what fittings does one purchase to replace any such fittings? I have a water pump that cycles every 15 minutes but I cant find a leak anywhere..... my thought is to purchase a end fitting to isolate each head or faucet etc. to see if the pump stops cycling.
thanks
Jim

most likely PEX and you can get "sharkbite" fittings most likely. You will need the diameter, and manufacturer - if possible. Some are "reusable", some are not and some are such a pain as to not be reusable. You will need a pair of cutters, as the connectors really don't like rough edges.

as to the cycling, it could be a bad pump diaphragm, or expansion tank gone bad. Faucets are easy...use a cup of water deep enough to stick the spigot in and see if you see bubbles. Talc powder or chalk dust can help in places you have tight access to.

Don't forget to check transom showers and tank fittings and valves as well as bilges (talc or chalk works well there, just dust the sides and look for streaks.

best of luck.

KD3PC · Aug 21, 2014

Jim D said:
I did think about the city water faucet. Is there a check valve in there? I ordered a new pump also as perhaps it is the culprit? This boat is new to me so I am on a learning curve. There is a manifold but it is before the pump and only shuts off the feed of each tank. If a leak I would assume its on the pressure side. Pressure drops than it turns on the pump if no leak it should be a problem with the pump. The city water line is on the pressure side so I was thinking about capping that line off first. Keep swinging I guess. Thanks Jim

there should be a pressure valve on the city water inlet, but it works backwards from the way most people think....it limits the pressure going TO the boat to about 25-30 psi (or should)...if it is leaking that can cause the pump to cycle. A lot of city water is 45-55 PSI and can damage your water system if that much pressure is allowed to use the boats systems.

I would cap it and the transom shower, anchor washdown, etc.....if your 41 has washing machine outlets, check those too, on my P42, the washer outlets were just stubbed up the wall behind the nav and were plumbed together?

Best of luck.

quadrille38 · Aug 21, 2014

Plumbing is most likely PEX. Whale also makes it.
Defender sells it and the fittings.

Most likely it is 15 mm which looks a lot like the 1/2 inch that is sold in many hardware store for residential use. Hunter tended to use metric size so the 1/2 inch won't work.

Don Lucas · Aug 21, 2014

after the pump kicks off, shut all the tank suction valves and wait, if the pump kicks on again then the problem is the pump

Bill Murray · Aug 21, 2014

there is a check valve in the city water inlet plumbing. Mine has never worked correctly (IMHO). I had a leak at the cover that threads onto this fitting. A new hose washer and voila no more leaks.
Of course it could be any number of other things. Do you have an owners manual which contains a schematic of all the plumbing?

Bill Murray · Aug 21, 2014

Also meant to mention that I had another leak at the fittings that bypass the hot water tank for winterizing. I replaced. If a PO added these or other fittings for the winterization process definitely check. Also check the aft deck shower - a notorious problem.

artboas · Aug 21, 2014

I have some answers for you

Jim D said:
I have a 2001 410 hunter that has red and blue color plumbing in it for the fresh water. does anyone know what the name of this product is and what fittings does one purchase to replace any such fittings? I have a water pump that cycles every 15 minutes but I cant find a leak anywhere..... my thought is to purchase a end fitting to isolate each head or faucet etc. to see if the pump stops cycling.
thanks
Jim

Ok,,first of all, the fittings are Whalebp 15 mm. You can buy all this stuff from defender real cheap.
If the pump cycles, it is not on the suction side; it's on the pressure side.
There is a water manifold under your galley. You can shut off all of the water circuits, which will help isolate the leak.
First thing, shut off all of the manifold valves. If the pump stops cycling, then it is in one of the water branches.
If it continues to cycle, it's a bad pressure switch or check valve in the pump

Check the cockpit shower. It's usually the culprit for this when you have a small leak

Bill Murray · Aug 22, 2014

Jim D said:
I will be down tomorrow to investigate again. I didn’t see any manifold under the galley. I will lift the floor to see if it’s there. I only saw the manifold under the u shape sofa forward of the galley front wall.... it’s for 3 water tanks, port, starboard, and aft. The manual does not show any other manifolds but you never know. I will take pics. I am replacing the pump first. If that cycles it must be an issue downstream. I must find each line and cap off until I find the branch with the leak. Again I think it’s the city water line. My guess but no water is found leaking anywhere. Bilge is ok. The boat is challenging me already……. Keep you posted. Jim

Jim -

There is only the manifold you have discovered under the dinette cushions. There are no shutoff valves on the pressure side circuits.
could be the pump but unless your boat has had a lot of use, not likely in my experience.
My boat it would be a leak somewhere - a dripping faucet (there are a lot of them), or most likely the hot water fittings or city water inlet (which is on the pressure side). If you are not seeing any leaks into the bilge, I would strongly suspect the city inlet. Mine leaked onto the swim platform and took me a long time to find. Same with the aft deck shower.

you can check the pump by disconnecting the pressure side plumbing and putting a capped fitting on to check but is air is in system it may still try to pump and not shut off since the air is compressible.

Also - did the PO add anything to the system ( like a wash down tap in the anchor locker)?

what fittings were loosened to winterize - might not have been tightened properly?

Good luck. When you find it, be sure to share.

artboas · Aug 22, 2014

Re-think perhaps

Jim D said:
I will be down tomorrow to investigate again. I didn’t see any manifold under the galley. I will lift the floor to see if it’s there. I only saw the manifold under the u shape sofa forward of the galley front wall.... it’s for 3 water tanks, port, starboard, and aft. The manual does not show any other manifolds but you never know. I will take pics. I am replacing the pump first. If that cycles it must be an issue downstream. I must find each line and cap off until I find the branch with the leak. Again I think it’s the city water line. My guess but no water is found leaking anywhere. Bilge is ok. The boat is challenging me already……. Keep you posted. Jim

The pump is quite expensive. I would change that last after you've ruled out the leads as I've described.
Look in the 410 manual. You will see the manifold

Don Lucas · Aug 22, 2014

there's no water manifold under the galley sink on a 410

a pump coming on every 15 minutes is a good size leak, if you haven't seen it or if there is no water collecting in the bilge the water pump is leaking back into the tank

like I said earlier, run the pump till it shuts off and then shut the suction manifold valves and see if the pump is still coming on like it currently is, if it doesn't it is the pump, if it does it is a leak somewhere

why wouldn't you start with the easy?

and regardless plug that dam dockside water connection as it is just a way to sink the boat if a fitting starts to leak

Ralph Johnstone · Aug 22, 2014

Don Lucas said:
and regardless plug that dam dockside water connection as it is just a way to sink the boat if a fitting starts to leak

The dockside water connection is such a bad idea I have to wonder if the insurance company would declare the coverage null and void when the boat sinks

.

I think they only cover bad ideas up to a point and then you're on your own.

artboas · Aug 22, 2014

Water manifold

Don Lucas said:
there's no water manifold under the galley sink on a 410

a pump coming on every 15 minutes is a good size leak, if you haven't seen it or if there is no water collecting in the bilge the water pump is leaking back into the tank

like I said earlier, run the pump till it shuts off and then shut the suction manifold valves and see if the pump is still coming on like it currently is, if it doesn't it is the pump, if it does it is a leak somewhere

why wouldn't you start with the easy?

and regardless plug that dam dockside water connection as it is just a way to sink the boat if a fitting starts to leak

Ok, I was just going from the user manuals. Obviously you know more about the 410 than I do.
This really sounds like a leak on the pressure side, and the simplest thing to do is cap the pump output, and see what happens. I'm surprised there is no manifold, cause hunter has been plumbing their large boats that way for awhile.
As mentioned, I would wait with changing the pump, cause it's $250 you might not need to spend.
I know someone who sank their 49 with their dock water line.
I am crazy careful with this. The moment I get off the boat, I disconnect if.
I have a Gardena water plug-in adapter on my dock water input, so I just pull it. Takes 2 seconds.

Bill Murray · Aug 25, 2014

glad to hear you are fixed. BTW do you have the owners manual for the boat?

Don Lucas · Aug 25, 2014

artboas said:
Ok, I was just going from the user manuals. Obviously you know more about the 410 than I do.

The manifold for a 410 is right where the user manual says it is! I don't really understand you think it would be the same for a 49.

plumbing fittings?

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