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Old 02-15-2014, 12:36 AM   #1
Junior Member
Join Date: Jan 2014
Location: AR
Posts: 16
1st RV to have PDI- de-winterize?

Hi all!

I'm about to have a PDI on a brand new TT next week. It's winterized, but I have the option to have them de-winterize it. Weather is going to be between 50s and high 60s per forecast next week. I would like to have a comprehensive inspection though--should I get them to dewinterize it before the PDI? Or does it really matter in terms of looking for leaks, testing out the faucets and all? My sales guy said that the antifreeze would show if there is a leak.

Also, are there any surprise fees I should watch out for like ridiculous document fees? We agreed on the sale price at a recent RV show and there is already a service and handling fee added to that.

Thanks for your time!

Mr Nervous

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Old 02-15-2014, 03:33 AM   #2
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Join Date: Nov 2009
Posts: 2,043
Yes, they need to de-winterize it to properly test the plumbing's ability to hold pressure.

When I PDI I use air pressure to bring the entire fresh water system up to around 70psi and leave it there for at least 15 minutes or so. IF I lose more than 5psi I have a leak somewhere that will drip water if is was under water pressure.

They also need to completely flood the black and gray tanks well up into the coach to check for leaks at the base of the shower, base of the toilet and every trap -so, yes, they have to de-winterize it in order to do a proper PDI.

The only added cost to de-winterize and re-winterize is 2.5 gals of antifreeze - the labor should be the same since they need to pressurize the system to do a PDI anyhow.

I would have them re-winterize it if you're in an area where it may drop below freezing anytime soon. If you're not familiar with how to de/re-winterize your new coach then ask them to show you how step-by-step during the walkthrough when take delivery. Enjoy!

94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
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Old 02-15-2014, 09:50 AM   #3
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Join Date: Nov 2002
Location: Columbus, MS
Posts: 33,770
I would have them de-winterize it so it's ready to go when you pick it up!

I would refuse to pay ANY fees that were not spelled out for you during the purchase!

Good luck, happy trails, and God bless!
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 02-15-2014, 10:14 AM   #4
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Join Date: Jan 2014
Location: AR
Posts: 16
Wow thank you for the helpful and informative response, 94-Newmar.

I was wondering if they would normally air pressurize the system to check for leaks but as I expected the sales guy did not know too much technical details. However he is letting me examine the RV before the actual PDI so I can make a list for the tech to focus in on--I did notice things when it was in the RV show: like too big of a gap between the bathroom door and door frame that I can open it with a good yank without turning the knob, and kitchen faucet that doesn't seem to be solidly tightened at the base.

I would consider myself a handyman, but this is my first RV, and I don't want to hassle with having to keep towing it to the dealer too much. I appreciate if anyone has any suggestions significant areas to examine.
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