Utility Center setting for winterizing Greyhawk with air?

[NC Roamer]

I recently winterized the Greyhawk 31FK with a compressor. First, I opened the three low point drains and let them run until empty. Then I set the controls in the Utility Center to City Fixtures (2 and 6), turned on the compressor at 25 psi, and opened all the faucets one at a time until no more water came out. I made sure to blow the water out of the toilet fill line and the outside shower and then moved the compressor to the black tank flush inlet to blow it out.

When no more water could be blown from any line, I dumped the accumulated water from the BW and GW tanks and closed the dump valves. Then I poured pink stuff into each trap, dumped some down the toilet and left some in the toilet bowl.

I am pretty sure all is well but I have one question. Is the City Fixture setting (2 and 6) in the Utility Center the correct choice when blowing out the lines? It seems so, but with temps predicted to be in the teens here this week, I just wanted some reassurance.

[anav8or]

That's where I set mine when I blew it out. A couple of other things to watch out for - if you have a water heater, make sure you pull the plug on it and drain it. If you have the tankless heater you should be good. Finally, if your fridge has an icemaker, make sure you clear it as well.

Spring can't get here soon enough!

[Grumpy]

But you need to get some antifreeze into the pump, using just air does not protect it.

[anav8or]

Originally Posted by Grumpy

But you need to get some antifreeze into the pump, using just air does not protect it.

Good call, Grumpy. Interestingly, the manual from our Seneca is pretty light on instructions for using air:

Air pressure
This method will utilize an air hose to blow excess water from the water lines.
1. Make sure all holding tanks are empty and drain valves OPEN.
2. Run the water pump until it is dry, this will take approximately 15-20 seconds.
3. OPEN all faucets and drains, and the toilet.
4. Using an air hose and adapter (customer supplied), blow air through the city
water connection. Any remaining water will blow out in five to ten minutes.
Pour one cup of non-toxic RV antifreeze into all drain P-traps.

I found step 2 surprising - they don't mention pulling antifreeze through the pump.

[WDW]

Also our tech who checked my work said to blow the black tank washer to make sure that was dry. Now you have me wondering about the toilet fill.... Too late now... Plus it's 13 outside!

[anav8or]

Originally Posted by WDW

Also our tech who checked my work said to blow the black tank washer to make sure that was dry. Now you have me wondering about the toilet fill.... Too late now... Plus it's 13 outside!

I've never worried about completely clearing/drying the waste tanks. I figure there is plenty of room in there for expansion and I haven't had a problem - even after last year's "Polar Vortex".