loft void

Watermist Installation

Automist® is an easy to install alternative to home fire sprinkler system

Automist must be installed by one of our Authorised Installer Resellers and can take as little as 2 hours. Automist was designed with retrofit in mind. Easy installation is, in part, due to the use of flexible high pressure hose which do not need to go through the ceiling because of the position of the spray heads. It also does not require a commerical grade water main or a tank.

Download the User Manual in our Technical Information Pack .


Build it Award - Best Technology Product

Fire Sprinkler designed for retrofit

Installation Procedure

Specification & preapproval

Submit your layout to your nearest Authorised Installer. They can provide layout specification free of charge and a cover letter stating if they believe Automist is suitable for the proposed purpose. This letter can often be the starting point for a dialogue with Building Control. You must ensure your proposal meets your Approvers requirements before proceeding.

Site visit

Site visit

There is typically a site visit to run through the design, your preinstallation requirements, ensure you understand the system and give you an opportunity to ask any questions.

automist electrical connection
loft conversion mini sprinkler

Preparing the site


Sufficient space to install the pump. The pump is 366 mm (height) by 216 mm (depth) by 151 mm (width) and weighs 7.0 kg, and should not be housed in a volume of less than 0.124 m3.

A reliable cold water supply (5.6 lpm flow and 1 to 10 bar pressure) with a standard BSP 3/4" connection.

Automist requires an independent 230V a.c. / 50Hz electrical supply, not shared with other unrelated devices via an unswitched fused connection unit (FCU).

Install the spray head

Install the spray head

The Automist tap head should be installed within a standard 35mm hole, Automist fixed head is wall mounted in a standard single-gang mounting box and Automist Smartscan is affixed in a custom wall mounting box.

water supply

Connect the water supply

Position the pump as close as possible to the mains water supply pipes. Connect the high-pressure hose from the assembled emitter to the outlet on the pump. Connect the 3/4” water supply with an approved isolation valve to the check valve and filter. Finally, connect the check valve outlet to the pump inlet.

electrical connection
heat alarm wiring

Connect the electrics

Connecting the power to the electrics requires a suitably qualified & competent person. Switch off electricity at the mains before working on existing circuits.

pump commissioning
sprinkler paperwork


Commissioning is a procedure which allows Automist to be tested. During commissioning, the pump runs for approximately 20 seconds and the output pressure is monitored. A test shield is provided to direct the resulting spray into an adjacent sink or within a bucket.

System installed

System Installed


Once your commissioning form has been logged and automatically verified by Plumis for consistency and completeness of data a warranty certificate will be issued.

 Download Automist commissioning form example - form.pdf (1.06MB)

Once your commissioning form has been logged and verified by Plumis a warranty certificate will be issued.

 Download Automist warranty certificate example - certificate.pdf (0.15MB)

Installation Complete