Outdoor Wood Furnace Info

All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: Radio Tech1964 on October 13, 2021, 06:29:45 PM

Title: Water Treatment Revisited
Post by: Radio Tech1964 on October 13, 2021, 06:29:45 PM

I just got through draining and flushing my OWB getting ready for winter use. I have the rain cap soaking in Kroil but I don't hold much faith in getting that off for a more thorough cleaning. Anyway, I got some info via email from Rectorseal about an 8-way boiler treatment for hydronic and steam boilers. I haven't tried any of this but noticing the specs it contains caustic soda and since I'm not familiar with the composition of other treatments I was a little cautious. FWIW I attached the info I received on this treatment.  Just getting everyone's opinion :)

Title: Re: Water Treatment Revisited
Post by: mlappin on October 20, 2021, 03:18:46 PM

I take it they figure once the rust is gone the caustic soda won’t have anything to react to?

Title: Re: Water Treatment Revisited
Post by: Radio Tech1964 on October 27, 2021, 07:35:22 PM

Could be. In that case, it might be worth a little more research.

Thanks for the info.

Title: Re: Water Treatment Revisited
Post by: BoilerHouse on October 28, 2021, 07:06:31 PM

It is very common to see boiler water treatment with caustic soda as one of the components.  It raises the water pH, ideally to around 8.5 or 9.  At this pH, oxygen is the least reactive, therefore less likelihood of iron combining with oxygen - i.e. rust.