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Old 10-23-2019, 02:07 PM   #6
gmc
Senior Member
 
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Brand: Thor Motor Coach
Model: Hurricane 32A
State: Florida
Posts: 1,873
THOR #2829
Quote:
Originally Posted by Seagimp View Post
Well how does using compressed air blow out part of the line?
I've had no issues (when I was in the north and needing to) with either antifreeze or blowing out lines...
Reality for blowing out lines - you don't need to get every drop of water out. the problem with freezing is expansion - ice takes more room than water. As long as there is no point that can't safely expand - a little water freezing isn't an issue...
Antifreeze down drains is important as traps can freeze in a way that expansion has no place to go - but the normal feed lines being 'mostly empty' is perfectly fine.
I typically drained fresh water tank, bypassed and drained water heater, connected airline (regulated to 35psi) to city connection and opened each faucet (don't forget toilet and outside shower) one at a time until only air came out. I poured a gallon of antifreeze - splitting between each drain and toilet - getting into each trap, toilet bowl, and flowing into gray and black tanks (again tanks themselves not being an issue - lots of room to expand - but wanting antifreeze in line between tanks and dump valve.)
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Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
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