Dome Water Main Shut-Off Valve (DMWV1)

Quick verdict

The Dome valve is the simplest path to Z-Wave water shutoff. It clamps onto your existing quarter-turn valve, no plumbing required, and gives you fully local control through Home Assistant. Pair it with Z-Wave leak sensors and you have automatic shutoff with zero cloud dependency. The plastic build quality is the main concern for long-term reliability.

Standout: No-plumber-required installation clamps directly onto existing quarter-turn ball valves for fully local Z-Wave water shutoff control.

Last checked: 2026-05-31

Compatibility snapshot

Why it stands out

• fully local Z-Wave control with no cloud dependency
• clamps onto existing quarter-turn ball valves without any plumbing modification
• pairs well with Z-Wave water leak sensors for automated shutoff in Home Assistant

Reasons to hesitate

• requires a Z-Wave hub or coordinator
• motor can be slow to actuate compared to professional motorized ball valves
• plastic construction raises durability concerns for a device clamped to a water valve long-term

Best for

• Z-Wave Home Assistant users who want fully local automatic water shutoff paired with leak sensors
• DIYers who want to add smart water control without calling a plumber

Avoid if

• you want a professional-grade solution with water monitoring and pressure sensing
• you do not already have a Z-Wave coordinator in your smart home setup

Privacy and local-control notes

Fully local Z-Wave device with no cloud component. All communication goes through your Z-Wave hub on your local network.

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

Buying reality check

Price notes: Mid-range pricing. Requires a Z-Wave coordinator sold separately. Much cheaper than professional whole-home water monitoring systems.

Compare side by side: see valve comparisons →