Marine head won't pump - Page 2 - SailNet Community

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  #11  
Old 08-18-2014
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UPDATE: still having trouble with pump on Raritan PHII pump, but narrowed it down.

It's not the pump or joker valve, which looked clean enough and when I disconnected discharge line going to tank
it pumped easily.

It's not the tank vent, which I ran water through, and wire easily. Clean.

But I cannot disconnect the white, 1 3/4" flexible pipe from either the tank (where I think the problem is), or from the
90 degree elbow joint, plastic, which is in an awkward place.

Question: did PO use a special pipe lock or sealant which makes these difficult to remove (and conversely, leakproof)?
And how do you get them off?!

I tried pumping out while pumping in saltwater through bowl, and even tried blocking air vent and pumping to create a vacuum but no go.

Frustrating! Advice appreciated...
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Old 08-18-2014
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Re: Marine head won't pump

Quote:
Originally Posted by JIvories View Post
UPDATE: still having trouble with pump on Raritan PHII pump, but narrowed it down.

It's not the pump or joker valve, which looked clean enough and when I disconnected discharge line going to tank
it pumped easily.

It's not the tank vent, which I ran water through, and wire easily. Clean.

But I cannot disconnect the white, 1 3/4" flexible pipe from either the tank (where I think the problem is), or from the
90 degree elbow joint, plastic, which is in an awkward place.

Question: did PO use a special pipe lock or sealant which makes these difficult to remove (and conversely, leakproof)?
And how do you get them off?!

I tried pumping out while pumping in saltwater through bowl, and even tried blocking air vent and pumping to create a vacuum but no go.

Frustrating! Advice appreciated...
If this white hose is your main discharge line from head to tank or thru hull, then it most likely it has been heated to fit on the barbs and it will need to be cut off or heated to remove. Any way you can do it is fine; it's just going to be a female dog. But keep in mind that the plastic piece which fits the head is pretty fragile. Good luck.
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Old 08-18-2014
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Re: Marine head won't pump

Cut the hoses off and replace them instead of messing around and just delaying the job!!!!
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Old 08-19-2014
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Quote:
Originally Posted by Don0190 View Post
Cut the hoses off and replace them instead of messing around and just delaying the job!!!!
Yep, I'll replace hose, and bring a heat gun. Thanks.
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Old 08-19-2014
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Re: Marine head won't pump

For replacing the hose, I would suggest removing the elbow from the pump first, heating the hose, then working the elbow barb out of the hose. Trying to horse it off in place may lead to a broken elbow. That would be the discharge elbow, you're right elbow, or both.

Also, such jobs are best scheduled when there as few bystanders as possible to be offended by the requisite outbursts of profanity. And have a first aid kit handy. I for one never seem able to finish such jobs without bleeding.
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Old 08-19-2014
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Re: Marine head won't pump

Cut the dam hose off above the nipple, then take a razor knife and slowly cut the remaining part lengthwise till you can peel it off the fitting (squeezing with a pair of channel lockers helps). Forget this heat gun crap!
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Old 08-21-2014
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Re: Marine head won't pump

Well the heat gun did work well and in a couple minutes I found the blockage: two paper towels like a cork in a 90 degree elbow. Think the elbow isn't a good idea, but certainly not paper towels! But... I also found little chips of metal, a few cms wide. I'm worried that they might have come from the sea water intake, which I'm having trouble closing.

Still, I feel like I won this battle with the head and will know what to do next time.
Thanks for all the advice.
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Re: Marine head won't pump

The raw water intake sea **** that is, which may be rusting inside?
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Re: Marine head won't pump

you put paper towels down the head?

you earned the clog
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Re: Marine head won't pump

Sounds to me as you have a clog and my guess would be in the vent line. Check right at the fitting as it comes out of the tank. That seems to clog quickly esp. if you have had a lot of use and maybe a full tank. Also pour some veggie oil right in the bowl and pump thru it does a marvelous job lubricating your pump piston.
Peter
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