Zooz ZAC36 Titan Water Valve Actuator

Quick verdict

The ZAC36 clamps onto your existing ball valve and gives you Z-Wave control over your home's water supply. Pair it with a few ZSE42 leak sensors and Home Assistant, and you have automated water shutoff when a leak is detected. The price is premium, but it is insurance against catastrophic water damage.

Standout: Clamps onto your existing ball valve for automated Z-Wave water shutoff. No plumber, no pipe modifications.

Notes last checked Mar 22, 2026.

Compatibility snapshot

Why it stands out

• clamps onto your existing ball valve with no plumber needed for installation
• ships with a wired leak probe that closes the valve by itself, even if the hub is offline or you have no Z-Wave controller at all
• pairs with ZSE42 leak sensors for fully automated water shutoff on leak detection
• strong motor handles ball valves up to 1.25-inch (per Zooz) ball valves, covering most residential mains

Reasons to hesitate

• premium price, but cheaper than water damage
• requires AC power, so it needs an outlet near your main water shutoff
• bulky actuator motor sticks out from the valve, so tight spaces may be a problem

Best for

• whole-home water shutoff automation paired with leak sensors
• vacation homes or rental properties where a leak could go unnoticed for days

Avoid if

• your water shutoff valve is not a standard ball valve, since the clamp may not fit
• you do not have a power outlet near your main shutoff

Privacy and local-control notes

Fully local Z-Wave device. No cloud account needed. Your water valve control stays entirely on your local network.

Home Assistant support: supported · integration path: Z-Wave JS.

Buying reality check

Price notes: About $170 for the Long Range version at The Smartest House, in stock; the cheaper Z-Wave Plus version (about $140) was sold out there on 2026-09-06. Amazon lists the Long Range unit at about $200 (verified 2026-09-06). Mains-powered.

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