Look at the material safety data sheet for Sew Clean. It's phosphoric acid. In my opinion, at $50/gal that is a bit pricey for phosphoric acid.
On the other hand, Klean Strip Concrete etch and cleaner is also phosphoric acid and at about the same strength. Home Depot sells it for $18/gal. Vinegar (acetic acid), <$3/gal also works but probably more slowly. I soak joker valves in it overnight and the uric scale comes right off. Uric scale is mostly calcium in combination with proteins from your pee. Any mild acid should dissolve it. You can Google "uric scale remover" and find a bunch of commercial products also. -- Dennis C. Touche' 35-1 #83 Mandeville, LA On Mon, May 3, 2021 at 11:48 AM Peter McMinn via CnC-List < cnc-list@cnc-list.com> wrote: > SEW Clean > This is a non-toxic descaler that fr us has proven its weight In gold. > > Living aboard during this project must be interesting. > > >> My question is this. What does everyone use to help keep the lines clear? >> Do you pull them out every few years and clean them? Is there a chemical >> that I can flush down that will help keep them clean? >> >> Thanks, >> Doug >> >>
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
