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Winterizing fresh water systems.

  • dmcb
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6 years 2 months ago #93 by dmcb
dmcb created the topic: Winterizing fresh water systems.
A little late for this year.
I have always winterized my own systems. This started before there was a safe antifreeze for fresh water systems so I had to drain the system.
To this day I don't use the pink stuff. I don't want my system to be contaminated with it.
For many years I simply used compressed air and blew the system.
I removed the hose from the outlet of the pump, opened the most distant faucet and blew it until the water stopped coming out, closed it and moved to the next one and so on. That was on the cold water side.
On the hot water side, I drained the tank and blew the cold water line feeding the tank.
With the outlet line removed, I opened the most distant hot water faucet and did the same as with the cold water.
Of course I drained the fresh water tank and made sure the short line to the pump was drained.
I never used the dock hookup but if it has been used, there is a check valve that prevents filling the fresh water tank. You must blow from the outside to force open the check valve and drain the feed line to the water system.
No antifreeze and air doesn't freeze and break anything.
A few years ago I tried something different on our 3870. It has 13 faucets including an anchor wash and rear deck hose.
I reversed the pump and sucked the lines dry. Again starting with the one most distant which was the anchor wash.
I have been doing this for 4 or 5 years without a problem. We have electric flush toilets so that has to be drained also.
I do pour antifreeze in the toilets, shower drain, and enough in the holding tank through the toilets to prevent any problems with the small amount of water not removed with a pumpout.
The advantage is no compressor needed.
If it is normal for you to blow the lines and you wanted to try sucking them out, blowing the normal way and watching for water would varify sucking them dry was working.
I didn't do that and I will admit I was a bit uneasy the first spring but everything was OK.
Also I do have help but one person could do this pretty easy.
A small amount of water that might dribble out has never cause me a problem. If it blocked a line it would be forced out with either blowing or sucking.


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6 years 2 months ago #97 by David
David replied the topic: Re: Winterizing fresh water systems.
While a little late, better late than never :cheer: I am sure this will be helpful next fall

1990 Sunray Infinity
Twin 5.7 Cobra's

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