Shower Pressure (flow rate)

Low pressure mixer valves are designed for use on a gravity fed systems where pressures are between 0.1-1 bar. If dealing with a low-pressure installation, keep any restrictions such as elbow joints and bends, to a minimum. In extreme cases, to achieve the required minimum running pressure at the valve, it may be necessary to raise the cold-water cistern or increase the size of pipe and fittings to reduce frictional losses. Because of the difficulties involved in raising a cold-water cistern, it has become more common to increase gravity system pressure by installing a booster pump. If the minimum specified running pressure is achieved at the mixer valve, flow rate should be near to those quoted by the manufacturer. Performance will vary from one mixer to another, as restrictions within each valve and showerhead can differ. A Stratford Plumber can fit all showers.


High-Pressure mixing valves.

Some valves are designed for use on pumped gravity and mains fed’s water systems only, where the minimum pressure is 1bar high-pressure valves are generally designed to be more restrictive to provide better control of flow and temperature at the higher pressures. Flow rates in excess of 20ltr/min can be achieved, depending on available water pressure and mixer design.


General-Purpose mixing valves.

Some mixer valves are designed to work on all types of plumbing, balanced gravity systems from 0.1-1bar and pressurised systems above 1bar. Some general-purpose mixers are specified for connection to mains fed cold-water and gravity fed hot water. However, it should be noted that an imbalance of pressure outside the ratio stated by the manufacturer could give rise to fluctuations in showering temperature. To comply with water regulations, check valves must be present in both supplies to prevent cross flow through the mixing valve. Stratford Plumbers fit all plumbing valves.


Power Shower.

Often perceived to be the ultimate in exhilarating shower performance with high-pressure spray or sprays from gravity fed water supplies using a pump to boost the flow. The pump can be integrated within the shower unit or maybe a separate pump and mixer valve. Thermostatic models are available