Update -final 
Stewart was of coarse correct that the large water fill tube was screwed on to the poly water tank.
I removed the large original VW clamp, continued to screw the pipe in. Yes It was out a bit
Reinstalled VW clamp but still leaked
Removed VW clamp and noticed it was no longer circled in shape.
Added two new NAPA hose clamps. That helped a bit still small leak.
Removed everything again and added 4 wraps of Teflon tape to the poly tank threads. 
Finally no leak. Let is set for 24 hrs.
Nice and dry this morning.
I now have a cleaned onboard water reservoir and one that doesn't leak!
I'm on a roll now! 
Now to replace 
+the old AFM with the new GOWESTY rebuilt unit.
+The front heater valve which is now stuck on
+Hall sensor wiring plug
+Fuel  tank hoses on top of tank and install a new fuel sending unit
I'm ready to start vacation again in a few weeks Possibly, maybe, could happen. Right!
Thanks for all the help in cleaning the system out and how to proceed .

Dennis Jowell
Scotch Hollow Farm
Newbury, Vermont 

> On Jun 1, 2016, at 6:03 AM, Dennis Jowell <dennisjowell@gmail.com> wrote:
> 
> Stuart
> Good point. Maybe that is the problem with the sealing aspect. The hose screws on, then clamp it. I did replace it a few years ago, but do not remember that I screwed it on. I'll take  it apart and reinstall the hose again. See what's occurs 
> 
> Dennis J
> 
> Dennis Jowell
> Scotch Hollow Farm
> Newbury, Vermont 
> 
> 
>> On May 31, 2016, at 10:08 PM, Stuart MacMillan <stuartmacm@gmail.com> wrote:
>> 
>> The OEM hose has a spiral bead in it and the nipple on the tank is threaded
>> to match. In other words, it screws on. It will be hard to seal any other
>> hose on this threaded nipple. RV shops and Go Westy sell the correct hose.
>> 
>> Stuart
>> 
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
>> Dennis Jowell
>> Sent: Tuesday, May 31, 2016 12:01 PM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Re: Onboard water supply?
>> 
>> Update ,
>> I now have cleaned the water tank , new supply hose, new sanitized hose to
>> the sink. I filled the water tank up 3/4 full just above the intake on the
>> poly tank. Drove around to Lowe's and back 90 miles Just To find out that
>> the large hose from outside to the inside of tank leaks. This hose is about
>> 1 -7/8" OD x 1" in width And fairly new. What happened was the large clamp
>> on the poly tank cannot get a good tight seal, hence water with Clorox
>> inside the cabin now. Should be pretty clean now.
>> Question? Is there a better clamp solution that I'm missing ? My fear is
>> that if I really tighten that 13 mm nut/bolt I'll crack the poly fill pipe.
>> Any suggestions?
>> Should I change the clamp to a smaller in width unit?
>> 
>> 
>> 
>> 
>> 
>> Dennis Jowell
>> Scotch Hollow Farm
>> Newbury, Vermont 
>> 
>> 
>>> On May 30, 2016, at 12:33 PM, Harold Teer <teer.vanagon@gmail.com> wrote:
>>> 
>>> Dennis,
>>> 
>>> What we do is to sanitize our water tank before any trip by adding the
>> bleach and running some of the water through the line to the faucet.  Let it
>> sit for 12 hours, run some more water through the lines to the faucet, and
>> let sit another 12 hours.  Then, we refill the tank and flush as many times
>> as warranted.  This water is used for washing dishes, etc. but not for
>> cooking or drinking.
>>> 
>>> For drinking water, I removed the table and table holder behind the
>> drivers seat since we never used that table.  For the last 20 years we have
>> placed either the 2 gallon disposable water containers you find at grocery
>> stores, or 2.5 gallon water container I bought years ago at Wal-Mart in that
>> space with the spigot hanging over the edge.  We have refilled the
>> disposable containers at campgrounds but that was iffy so I bought the 2.5
>> reusable one.  We refill it at campgrounds and when we know we are going to
>> be dry camping for many days, we buy the 2 gallon jugs of water at Wal-Mart
>> or whatever grocery store we are around and refill our container with that
>> water when needed.  We have taken several 3+ month trips to BC, Yukon,
>> Alaska, numerous shorter trips, and have never had a problem with water
>> sickness.  
>>> 
>>> I bought my original container at Wal-Mart and noticed they were selling
>> those containers again this spring or about $6.
>>> 
>>> See:
>> http://www.walmart.com/ip/Arrow-H2O-2.5-Gal-Slimline-Beverage-Dispenser-Blue
>> /15915151
>>> 
>>> Have a great trip,
>>> 
>>> Harold
>>> 
>>> 
>>> 
>>> Harold Teer
>>> 1991 Westy -- VANGAUX
>>> Harrisonburg, VA
>>> 
>>> 
>>>> On Mon, May 30, 2016 at 11:51 AM, Dennis Jowell <dennisjowell@gmail.com>
>> wrote:
>>>> Great discussion! Thanks to all for all the information. I'm out to add
>> bleach etc to the Westy water system. Also to check the complete system out!
>> No more bugs for me!
>>>> 
>>>> Thanks again for the help
>>>> 
>>>> Dennis Jowell
>>>> Scotch Hollow Farm
>>>> Newbury, Vermont
>>>> 
>>>> 
>>>>> On May 30, 2016, at 5:01 AM, Robert Keezer <warmerwagen@yahoo.com>
>> wrote:
>>>>> 
>>>>> To clean the Westfalia water tank,two teaspoons of bleach per five
>> gallons of water left over night, then flushed out with fresh water from a
>> trusted source.
>>>>> This will sanitize your tank and lines before filling with safe water.
>>>>> If the source isn't trusted, the same amount of bleach, two teaspoons
>> of bleach per five gallons.
>>>>> Bleach kills all bacteria and viruses, and dissipates after several
>> days.
>>>>> 
>>>>> Boiling . Kills all bacteria and viruses within 3 minutes.
>>>>> 
>>>>> Water purifying filters- Removes bacteria from un-trusted source of
>> water before it goes in tank, or before it reaches faucet.
>>>>> 
>>>>> Robert
>>>>> 1982 Westfalia
>>>>> 
>>>>> 
>>>>> From: Dennis Jowell <dennisjowell@GMAIL.COM>
>>>>> To: vanagon@GERRY.VANAGON.COM
>>>>> Sent: Sunday, May 29, 2016 5:17 AM
>>>>> Subject: Onboard water supply?
>>>>> 
>>>>> . What is a correct procedure to clean the onboard water supply to the
>> sink faucet which I use as drinking water also. I came down with something
>> as we traveled through Ontario camping. I think I did this wrong. In fact I
>> may not have done anything with the water only filling it up trying to get
>> out of town, ugh!
>>>>> Had to cut our planned trip short.
>>>>> Is there a water filter that's recommended to use while using a camp
>> ground water supply?
>>>>> Dennis J
>>>>> 
>>>>> Dennis Jowell
>>>>> Scotch Hollow Farm
>>>>> Newbury, Vermont
>>