Ensure your qualified plumber reads the instructions for the shower equipment. If the plumber has any questions, please contact the manufacturer for clarificaition

All of our showers are suitable for use with gravity fed, combination boiler, pumped or pressurised systems, BUT please note that the choice of kit used with the valve may move the pressure requirements into another bracket. We have provided an indication of the pressure requirements for each complete system on the website.

In respect of pumped systems, a minimum 220 litres of stored cold water is required.

The supply of water from the cold water storage tank to the hot water cylinder should be through a 28mm pipe.

The minimum size of the hot water cylinder should be 36" x 18". When considering the size of the hot water cylidnder, take into account the number of peopel showering one after another. As a very rough guide, a pumped 5 minute shower will use 50 litres of hot water.

To prevent air  being drawn into the system, good plumbing practices should be observed. The diagrams below show the recommendation for draw off of hot water from the cylinder.

Always use 22mm (3/4") pipe work, before the pump and after the pump, even when connecting to a 1/2" thermostat. If 15mm (1/2") pipes are used, the water flow will be severly restricted and the performance of the shower will be adversely affected.

In order not to lose water pressure, keep pipe runs to a minimum. Rather than make a bend, sweep the run. If a bend is necessary, use a purpose made elbow. The greater the number of bends, the greater the pressure loss, which may result in the non-return valves not opening or the pump not activating, allowing no water to enter the valve. 

In respect of pumps, the flexible connections should be used. The pump must not be bolted to the floor but sited on resilient pads. Loose pipes should be secured to prevent noise. For ease of maintenance, any pump used should be sited for ease of access. Normally, the ideal location is in the airing cupboard next to the hot water cylinder.

 All installations must have isolation valves fitted in easily accessible positions to conform to Water Regulations. Failure to do so could also invalidate your guarantee.

Before installation of the shower, the system must be thoroughly flushed through to remove all swarf, dirt and debris. Failure to do so could damage the working parts of the shower and woul invalidate any guarantee.

In respect of most pumps, it is necessary that a flow of at least half a litre a minute be provided to operate the pump's flow switches. This flow must be measured at the highest showering point.

If a 12" minimum head of water for a pump is not available, then a negative head pump will be required. This situation is like to arise more frequently in flats, loft conversions and properties with low ceilings. This situation can also arise if the installation has very long pipe runs or a large number of bends.