Installed two beta ultrasonic shutoffs this week that speak Thread/Matter and cut flow in about 0.7 seconds on a 60 psi burst test. Anyone else seeing better accuracy versus Flo/Phyn on nuisance trips, and how are you setting homeowner override windows so they don’t kill showers during pressure blips?
setting homeowner override windows so they don’t kill showers during pressure blips? I’ve had best results arming a 4‑min “shower hold” in Matter when hot-side hits about 90°F and flow stays >0.5 gpm for 8s, plus a 2‑s pressure moving‑average; it ignores <1‑s hammer spikes but still closes if >0.3 gpm is continuous for 45s — are your beta units exposing temp/flow so you can do that?
My take: I’d lean toward the simplest next step and see if it changes anything this week — if not, you’ve got a clear case to escalate. What would block you from trying that?
On my installs, I cut nuisance trips by binding the valve in Matter to a Thread humidity sensor and the bath fan’s smart plug: when RH jumps 8% in 2 minutes and the fan draws >15 W, I open a 6‑minute override so a 60 psi blip doesn’t nuke a shower while keeping the ‘0.7 seconds’ hard close for true bursts. Curious if your beta exposes flow slope so we can differentiate a 2.5 gpm spike from a steady shower without relying on temp.
I cut false trips by binding the valve to a Matter temp probe on the water heater outlet: when hot-side jumps >10°F and flow sits about 1.5–4 gpm for 30 seconds, it starts a 12‑min “override window” for showers. I still hard‑close if flow spikes >5 gpm or a floor leak sensor fires, so you don’t give a burst a hall pass. You reading outlet temp yet, or want the sensor model I used?