Disinfecting and draining potable water tank

I thought our worries were over.  We sold our 48 foot boat last year and crawled every inch of the bilge figuring out how everything worked.  We bought a motorhome.  How straight forward could THAT be.  I opened the book to "Disinfecting Potable Water System" and the first thing I said to Bob was "Wonder how you drain the potable water tank.  It doesn't say anything about it in the book".  So with a large mirror on my hands and knees I took pictures.  Couldn't find the usual valve to drain the tank.  Finally figured it out that when I took the picture under the bottom drawer so we would know how to winterize the hot water heater etc. there were two smaller white valves really close to the opening for the drawer.

So I measured how far back they were and with my 5' mirror I found two white ends of hoses.  Guess that THIS is where the water will come out.  Will try putting 5 gallons of water and turning the white valves to see if I have found it.

While I was at it I pulled out the cut away under the bed on the passenger side and there was a valve there with a long clear hose attached to it.  I am assuming that this valve is to open the end of the clear plastic hose and allow antifreeze to be added to the water system for winterizing.

Does anyone with a 2551 know if the above is correct?  I was going to disinfect the water tanks today and even called the factory but they don't answer on Saturday so I proceeded on my own.  Don't want a tank of water and no way to get it out.

The two valves under the sink are the low point drains for draining the cold water and the hot water lines in the fall. The fresh water tank in under the bed on the passengers side. The drain valve is on the aft end of the tank. The clear plastic hose is the suction hose for the RV anti-freeze. Hope this helps you.

Took the bed apart again.  Opened the hatch and found a valve on the aft end of the water tank.  It sure looks to me like it is in the "ON" position.  How does it get out?  I looked underneath outside and there is no outlet unless it hooks up to the outlet for draining the hot and cold water that is under the kitchen sink. 

I was wondering why you couldn't use the drain that is under the kitchen sink which is the low point of the RV.  Wouldn't it all drain out there?  And why is the valve aft of the water tank in the "on" position.  Is that so when I put water in the tank it will run all over and then I can see where the water is coming from?

This owners Manual is for the birds.  It tells you how to open and close the screen door and lock the main door.  And then it just says "drain the water" like I am a psycic and would just KNOW how to do it. 

Now I am wondering what else I should know on the 2551 that isn't in the book.  They should put in the book how to open the bottom drawer in the kitchen if you want to winterize the rig.  It sure doesn't open like any I have seen.  And there is no mention of the two white valves next to the edge of the drawer which I am now told is the low point in the rig to drain the pipes for winterizing.

I have remade the bed three times because I had to get under it.  At least we are not sleeping there tonight.  Glad we didn't just load up and leave.  I have wasted a whole day and I am NOT a happy camper tonight.

Anne

Based on your picture the valve is in the open position. Mine came from the factory that way also. One way to drain the tank is by that valve. another is to use the pump into a sink and drain the gray water tank when you are done. Be careful as the fresh water tank holds more water than the gray tank, so dump a couple of times. You should be able to lift one side of the mattress and open the hole without having to remake the bed each time.

On our 2008 PC 2551 there is a valve on the exterior driver's side in the area of the shore water connections that I thought was the drain for the potable water tank.  I haven't used it, but that was what I was told when we took delivery.  Perhaps the location of the valve has changed in more recent years, but where mine is located couldn't be easier for draining.

PC moved the valve from the outside to the inside because of the chance of it getting hit with something and broken off and/or kids playing around and opening it while you are not looking. That is what they told me.

Having had the outside valve replaced last year on my lightly used 2006 PC 2551, I would suggest that it was moved inside to get it out of the sun.  My valve knob sort of broke into many small dried out pieces, just like the identical appearing ones on igloo ice chests.  BTW, nobody I talked to knew of anybody making metal valves that could be used as an easy replacement.

Jerry