Showers Water heating Washroom solutions Space heating Spares accessories

Frequently Asked Questions

Welcome to our FAQ page. Here you will find some useful questions relating to our products, ordering system and customer support.

  • Pre Shower Installation

    • Can a Redring shower be connected to a cold mains supply?

      All instantaneous showers should be connect to the rising mains water supply, unless the unit is a power shower or mixer unit, as there are limitations on water services in order for the unit to perform correctly. Units can be connected to a header tank providing there is adequate head height to generate a minimum of 0.7 bar pressure.

    • Can a Redring power shower be fitted to a combi-boiler?

      There is no problem as long as the water services for the shower is taken before the combi-boiler, as most boilers are governed to 1 Bar pressure and if services are taken afterwards running pressure can drop to less than 0.7 Bar.

    • Does the wiring to my existing electric shower need to be upgraded if I was to fit a higher kilowatt rated unit?

      All wiring must be carried out by a fully qualified electrician and must comply with the current wiring regulations to meet the specification of the unit to be installed.

    • What can I do if there is not enough mains water pressure to operate an electric shower?

      If there is in-sufficient water pressure for your unit it would normally be down to a poor service from your service provider “lines could be blocked or restricted”, if this is not the case then your unit could be fed from a header tank with an adequate working head height.

    • What is the minimum flow rate and water pressure required for a Redring electric shower?

      The minimum running water pressure for the shower unit is 0.7 Bar.

    • What things do I need to think about when replacing an existing electric shower?

      If replacing an existing unit you must ensure that your water and electrical services are adequate for the unit to be installed.

    • What size fuse does a Redring electric shower require?

      The installation must comply with the current wiring regulations to meet the specification of the unit to be installed. This all depends on the kW rating of the shower unit. Please see below: 7.2kW shower = 32 Amp fuse 7.5kW shower = 40 Amp fuse 8.5kW shower = 40 Amp fuse 9.5kW shower = 40/45 Amp fuse 10.5kW shower = 45 Amp fuse Please note in order to comply with the current building regulations you should have a competent certified installer carry out any electrical work to the IEE Wiring Regulations.

    • What Redring shower will suit a gravity system?

      A power shower or mixer unit are the only recommended units as there are limitations on water services in order for any shower unit to perform correctly, standard mains shower units can only be connected to a header tank providing there is a adequate head height to generate a minimum of 0.7 bar pressure.

    • What Redring shower will suit a combi water system?

      There is no problem with any mains shower unit being fed from a combi system as long as the water services for the shower is taken before the combi-boiler as most boilers are governed to 1 Bar pressure and if services are taken afterwards running pressure can drop to less than 0.7 Bar

    • What Redring shower will suit a mains fed water system?

      Any unit except a power shower or mixer unit as these need to be gravity fed.

    • Do I need a pump?

      You can only pump water from a storage tank to feed to a shower; you can not pump mains water directly to a shower as it goes against local water by-laws.

    • What effect does the kW rating have on my electric shower?

      Electric showers only take water from your mains cold water supply and heat this water by passing it over electrically heated elements. The temperature of the water you get from your shower and the flow rate is therefore determined by three key factors: 1. the temperature of your mains cold water supply (this can vary from 5OC in winter to 20OC in summer) 2. the heating ability of your element in kW 3. the pressure of your mains water supply In simple terms, the higher your chosen showers kW rating the better the potential water flow rate from your shower at your preferred showering temperature. As a guide you can see below how the kW rating affects your shower flow*: * 8.5kW up to 27% more flow than a 7.5kW heater * 9.5kW up to 42% more flow than a 7.5kW heater

    • What side are the water and cable entries?

      All Redring showers have water and cable entries on the right hand side of the product when viewed from the front. It should be noted that these are typically top, bottom and rear entry. The Advantage range has both left and right hand entries for water and cable in top, bottom and rear positions making it suitable for replacement of most other makes of shower. Please refer to the installation manual or website for further details.

    • What fuse rating and cable size do I need for my shower?

      This would be dependent on several issues; the kilowatt rating of the shower, the cable run length and if cable runs through thermal insulation. You should install the shower in accordance with the current BS. 7671 (IEE Wiring Regulations) and Part P of the Building Regulations and/or local regulations. A this table can be found in the installation manual of your shower. If in doubt please call our technical advice line on 0844 372 7766.

    • If I want to install a higher kilowatt shower will my cable and fuse be ok?

      Your cable and fuse may need to be upgraded to accommodate a higher kilowatt shower. Consult a qualified electrician or phone our technical advice line on 0844 372 7766

    • Which of your showers are cold water tank fed?

      Redring Expressions 570 is an electric shower with integral pump. This is specifically design for cold water tank fed installations.

    • Can I fit a pump to help boost my mains pressure?

      Redring would not recommend fitting a pump to the mains water supply. You should seek advice from your local water authority.

    • What are the dimensions of the showers?

      These vary from one model to another. Please refer to our website for product specific information or contact out technical advice line on 0844 372 7766

    • Must my electric shower be wired to a dedicated electricity supply?

      Wiring an electric shower to a supply that has another appliance contacted to it violates the IEE wiring regulations. This is an unsafe practice as the electrical circuit will be overloaded. This type of installation should be carried out by a qualified engineer. Please call our technical advice line on 0844 372 7766

    • Should I have an isolation switch for my shower?

      In accordance with BS7671, the IEE wiring regulations and part P of the building regulations a means of electrical isolation (Disconnection of all electrical poles) is required. This is normally done through the use of a ceiling mounted double pole isolation switch, mounted either inside or outside of the bathroom but must not reachable whilst using the shower. If an isolation switch needs to be installed this must carried out by a qualified engineer. Please our technical advice line on 0844 372 7766

    • What is the minimum water pressure I require for an electric shower?

      The minimum water pressure required for a Redring shower is 0.7bar of dynamic water pressure.

    • What is the difference between dynamic and static water pressure?

      Static water pressure is the pressure of water with the water circuits closed (Tap closed). Dynamic water pressure is the pressure of flowing water (Tap open). Typically static water pressure is greater than dynamic water pressure.

    • How does an electric shower work?

      An electric shower is a shower that uses mains cold water only, this water is then heated by an electric element and distributed through a hose and shower head arrangement. The temperature of the water is controlled by either adjusting the element power or by adjusting the flow of the water. The benefits of this type of shower are that the shower can be used instantly as required. You do not use valuable heated stored water and is ideal for families and households were the amount of stored hot water is limited.

    • The water pressure of the water supply is poor. What shower would you recommend?

      We would recommend the installation of a Redring Expressions 570 pumped electrical shower. For further information either visit our website or call our sales team on 0844 372 7750.

    • Can you install an electric shower in a shower cubical?

      All Redring electric showers are approved for installation within a shower cubical.

  • During Shower Installation

  • After Shower Installation

  • Redring Selectronic Showers

    • What Selectronic showers are available?

      The Selectronic shower is available in four product ranges. The Selectronic Premier and Shower Safe ranges which are ideal for family showering and the Selectronic and Selectronic Plus ranges which are ideal for the care market. All of these ranges are available in 3 different kilowatt ratings being 8.5kW, 9.5kW and 10.8kW. For further advice please visit our website at http://www.redring.co.uk/showers.html or alternatively call our sales team on 0844 372 7750.

    • My Selectronic shower is thermostatic what does this mean?

      This means that the shower will maintain the required temperature irrespective of the changing inputs such as water temperature, water pressure and the fluctuation in electrical voltages.

    • How do I cool my shower?

      To cool the shower you need to press the cooler button once you will notice the display digit drops by one number each time the button is pressed. It should be noted that this function operates with the shower in both modes Normal and Temperature Lock.

    • My shower is in temp lock what does this mean?

      The Selectronic shower has two modes of operation Normal and Temperature Lock. When the shower is in the temperature lock mode the shower will not exceed the preset maximum temperature. This is of particular benefit when the shower is to be used by the less-able, elderly and children.

    • How do I take my shower out of temp lock?

      The shower can temporarily be taken out of temp lock whilst the shower is running. This is carried out by pressing the warmer and cooler buttons at the same time for more than 3 seconds, you will notice the temp lock light go out, the shower is now in normal operating mode. The shower will revert back to temp lock mode next time the shower is used.

    • How do I alter the water flow of my shower?

      To change the flow of your shower press the flow button, the shower will beep and the flow will change the temperature of your shower will not be effected by changing the flow. It should be noted that this feature is not available on the Selectronic Premier as this is a fully automatic shower.

    • The water does not stop when I turn the shower off?

      This is due to the Selectronic shower having a phased shutdown facility incorporated in it's logic. This allows the hot water to be flushed out with cooler water until 35°C is reached. You will notice when your shower is in the mode the display scrolls round and round until this cycle is complete, then stops automatically.

    • How do I commission the Selectronic shower?

      To commission your shower firstly you must ensure that the services to the shower are switched on and that the shower is in normal mode and not temperature lock mode using the switch located on the main logic PCB. After checking this press the start / stop button, then press the cooler button 5 times until the display shows number 1. Allow the unit to fill with water and wait for water to come out of the handset. Increase the temperature by pressing the warmer button and wait for the water temperature to increase, when this has been achieved press the start / stop button again and the shower will stop. Reset the switch on the main PCB. This is the commissioning process complete. This procedure must be carried out on installation by the installing engineer. For further advice please call our technical advice line on 0844 372 7766.

    • Shower makes a whirring noise when I turn it on?

      This is normal and is not a fault. The noise is omitted from a small motor within the shower which alters the flow, this operates each time the shower is used.

    • How do I increase the temperature of my shower?

      To increase the temperature of the shower you need to press the warmer button once, you will notice the display digit increases by one number each time the button is pressed. It should be noted that this function does not only work with the shower in Temperature Lock mode.

    • My shower display shows "OT"

      If your shower shows OT in the display, this indicates that the shower has detected an abnormal condition and has shutdown straight away stopping the flow of water. OT will remain in the display until the shower has cooled and reset at which point it will switch off automatically. This process can speed up by purging the shower of hot water.

    • Level Access Pump Shower where can I fit the pump?

      The level access pump must be installed inline with BS7671 IP zone rating for bathrooms and as per the specific instructions of the pump. This installation must be carried out by a qualified engineer. Please call our technical advice line on 0844 372 7766

    • What kilowatt rating sizes are available?

      The Selectronic shower range is available in 3 Kilowatt sizes 8.5kW, 9.5kW and 10.8kW and available in 4 model ranges.

    • How do I purge the Selectronic shower?

      You can purge your shower of hot water whilst the shower is displaying "OT" This is achieved by pressing the cooler button and the flow button at the same time for approximately 20 seconds. NOTE: The initial water purged may be very hot so please take care.

  • Redring Mixer Showers

    • What is a mixer shower?

      A mixer shower is a shower that is connected to both the hot water supply and cold water supply. The shower then mixes these water supplies to the required temperature, this is normally controlled by the customer adjusting a control valve.

    • Can I pump the mains water to my shower?

      You cannot pump mains water as per the 1999 water supply regulations, this prohibits boost pumps to be connected directly to cold water supply of your shower.

    • Can I use my mixer shower with a fully modulating boiler?

      Yes, provided the boilers activation flow rate is 2 l/m or less and the mixer is specified as suitable for pressurised (non pumped) systems.

    • Can I use my mixer shower with a step modulating boiler?

      Yes, provided the boilers activation flow rate is 2 l/m or less and the mixer is specified as suitable for pressurised (non pumped) systems. The temperature stability may be poor whenever the mixer valve is adjusted.

    • I keep getting a drip from the head of my shower?

      The shower head and delivery hose can retain a large volume of water. This can be expelled as dripping after the shower has been switched off. (This can occur for some time after the shower session has ended)

    • Can I use a cylinder flange when installing a mixer shower?

      A cylinder flange can be used to supply the hot water feed to the mixer. Usually a tee into the inclined section of pipe from the top of the cylinder is sufficient, provided the tee is pointing down. (This ensures any air released from the hot water bypasses the tee and vents through the expansion pipe).

  • Redring Water Heating