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Old 01-08-2021, 06:05 PM   #11
Don S
Senior Member
 
Join Date: May 2010
Location: Penticton British Columbia Canada
Posts: 243
Default Re: Lite rust inside block

I used a product called Kleen -Flo , mixed the container with water and filled the block. After about 1 hour I drained it and flushed with garden hose till clear. I repeated the process . Very little color in the second flushing . I will replace the anti-freeze until spring.
Thanks all for your suggestions
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