How to deduce shower flow

Reducing flow - Digital / Smart products:

Black, orange & watermelon (pink) Smart Valves feature an "Eco" setting which reduces flow by approximately 33% and can be selected following the steps below. Please note: "Eco" is not compatible with combi boiler systems as this will likely cause temperature fluctuation.

Switching to "Eco":

1. You would first need to locate the fused spur where the Smart Valve connected power supply is connected. This is likely sited close to the Smart Valve. If you are not familiar with the Smart Valve or its location, this is the box that mixes the water and controls shower temperature. Smart Valves are often installed in a loft space, airing cupboard or under the bath. In any case, it will be within 10m of your showers main control as this is the maximum length of the data cable connecting to the main control. Once located, the fused spur will need to be turned off - depending on the installation this may be a switch box, plug socket or small box where the fuse can be popped out.
2. Isolate the power to the Smart Valve using the fused spur.
3. Remove the lid(s) on the Smart Valve by loosening the single screw:

On pumped units (2 lids), the screw is located between both lids.
On the box labelled Logic Module, insert a flat head screw driver into the slot on the blue dial under "MODE" (bottom left corner of logic module). Please ensure you select the correct "Eco" mode that is compatible with your water system i.e. HP or Gravity.

Once changed to the correct "Eco" setting, replace the lid(s) and turn the fused spur back on.

Reducing flow - Harmony heads:

Many of our products include the Harmony head which features an "Eco" spray setting which can reduce flow up to 25%. This can be set by turning the lever on the spray plate to face the 3 o'clock position. Please note: The "Eco" setting may cause combi boiler systems to experience temperature fluctuations. Harmony heads are available for our showers ranges including a specific model for Electric showers and can be purchased separately if required.

Flow too powerful (pressure):

Pressure (the force, rather than volume of water) is governed by the Bar pressure of your water system. This includes the output Bar pressure of a booster pump / integrally pumped shower in gravity installations. Reducing flow via an "Eco" will not lower pressure. Dependent on the installation, a pressure reducing valve (PRV) may be compatible - please see below...

Gravity systems with booster pumps / integrally pumped showers:

We do not recommend the use of PRVs on our pumped products as this could damage the pump.

Combi boiler, ground / air sourced heat pump systems:

A PRV may be an option but you would need to consult a plumber.

Unvented systems:

PRVs should feature as part of the installation and generally operate at 2-3 Bar of pressure. If you are experiencing an increase of pressure on an unvented installation, this could indicate that the air gap inside the tank needs servicing. This would need to be assessed by a plumber qualified to work on unvented tanks.