Brian:
I don't know if this is code compliant in your area but Uponor (use to be called Wirsbo) makes a residential system that is part of your home plumbing system. It's a pex pipe system so the labour to install it is less than the normal iron or copper system.
Thanks. I won't worry about code compliance right now, as I won't be building here in Minnesota. I'm going to move someplace warmer first.
The only downside I can see with this is if it does activate, you would be charged for the water that passes through the water meter. I think, but am not sure that sprinklers if dedicated are not metered.
If it keeps the house from burning down, I won't mind paying for the water!
