I think it all depends on placement and location, to remove as much as possible.
I've been meaning to write a similar post about anti-freeze systems and air vents. These are almost always dead-end systems and I'm finding dilution at the source even after a single year. Granted 13 requires a physical end of line which could be used to vent but I hardly ever see one with existing systems. My only guess for dilution would be air mitigation over time allowing water to pass the BFP or CHV into the AF portion of the system. I would think an AAV would solve this but I wonder with all these secret new listed formulas of AF out there, would they effect the inner parts of these devices? Apologies for the digression from topic but saw this as an opportunity to query the group. Too bad GLC isn't here, he'd have $0.02 to add. TD Cc: Jerry Van Kolken <[email protected]> Subject: Air Venting (2021) I was reading the Air Venting discussion from early 2020 and this really didn't come up. The code only requires a single vent, but I can think of several situations where I there would every branchline would be trapped. Say a tree system with BL on riser nipples, any system in an peaked roof where the branchline travel up the pitch then back down. I don't under stand how the single air vent relives the air from more than that single branchline it would be installed on. I'm I think of this too much like trapped water for drainage? Jerry Van Kolken Millennium Fire Protection Corp. 2950 San Luis Rey Rd. Oceanside, CA 92058 (760) 722-2722 FX 722-2730 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
