Installation & User Guide SHOWER PUMP
Contents
1. Do Cistern Mixing Valve DHW Unsuitable Layout for Mira Enduro Pump Figure 5 Mixing FOF Valve Unsuitable Layout for Mira Enduro Pump Figure 6 Mixing Valve Unsuitable Layout for Mira Enduro Pump Figure 7 14 Plumbing push in connectors Do not use stainless steel chrome or nickel plated pipe with the flexible hose push in plumbing connections Do not introduce solder flux into the joint or surrounding area as plastics will be attacked and may fail All solder joints should be completed before final connection to push in connections on the flexible hose Flux residues must be removed Do not allow contact with oil or cellulose based paints paint thinners or strippers acid based descalents or aggressive cleaning agents 1 Make sure that the pipe is free from all score marks and deformities in the area of the insertion depth and cut the pipe square removing all burrs and sharp edges to prevent damage to the O seal 2 Before inserting the pipe into the fitting mark the insert depth on the wall of the pipe with a soft pencil at a distance of 33 mm from the end to be inserted refer to illustration 3 Check in the mouth of the fitting that the O seal nylon washer and collet are in position refer to illustration Nylon Collet Washer O Seal 7 22 mm Pipe ahal kuudi Pencil Mark Pipe2. Check all fuses and RCD Ensure power is available at pump terminal box If fuse blows repeatedly refer to 6 b Clean shower heads ensure flow controls are operating correctly Check for air locks Check for isolating valves not fully open other restrictions Check system has adequate static head and flow potential refer to Operation on page 6 Flow switch mechanism sticking New installation Check wiring in electrical boxes refer Fig 8 Check continuity of flow switch reed see Note 1 at end of section Pump impeded internally refer to 6 b Allow motor to cool up to 1 hour Refer to 6 C Pump operates momentarily when not required a Flow switch operating due to water movement in pipework b Flow switch reed PCB tripping Air pocket after pump Locate and ensure adequate venting Air pocket in pump supply hot expanding due to system heating Correct pipework layout to eliminate thermal flow fit a single check valve close to and after pump outlet see Note 2 at end of section Local source of strong electro magnetic radio transmission Shield flow switch reed tinfoil Symptom 3 Pumped flow pressure is initially adeguate but reduces after short time a Water supply fault Rectification Checkthathot and cold storage volumes are sufficient for demand Check that all supply strainers including mixing v
3. Ltd Telephone 01 4591344 Monto Fri 9am to 5pm Fax Dublin 01 4592329 24hours Post Otter House Naas Road Clondalkin Dublin 22 mira SHOWERS BS EN ISO 9001 1994 Reg No FM 14648 OKohler Mira Limited February 2005
4. Renew Mira Enduro pump If no free movement refer to 4 b probable motor bearing failure non serviceable assembly Renew Mira Enduro pump 6 Leak from a Seal worn If leak is from rear of impeller pump damaged housing at junction with motor housing b Inlet pressure assembly mechanical seal requires above renewal maximum If leak is from perimeter of impeller permitted housing then housing seals require renewal 3 See Specifications on page 8 Note 1 Flow switch continuity should be checked with power switched off and one flow switch lead disconnected Use appropriate continuity meter Correct operation is open circuit with no flow and closed circuit with flow Note 2 Fitting a check valve is a secondary measure initially the cause of water surge should be investigated and rectified The single check valve should be of spring loaded pattern and fitted in discharge pipework This may increase the mini mum head pressure required to operate flow switch 20 MAINTENANCE General Mira products are precision engineered and should give continued superior and safe performance Providing that the pumps have been correctly installed and operated as advised in this booklet difficulties should not arise AN WARNING ISOLATE POWER SUPPLY BEFORE REMOVINGTHE PUMP TERMINAL BOX COVER Components are precision made so care must be taken during servicing to avoid damage When ordering spare parts please
5. state product type i e Mira Enduro and identify part name and number refer to PARTS LIST Regular preventative maintenance is not reguired The fault diagnosis section should determine the cause and rectification for any difficulty experienced with the operation of this pump If further assistance is required refer to Kohler Mira Technical Office for advice Storage If this product is not installed immediately upon receipt ensure that it is stored ina dry frost and vibration free environment in its original packing DECLARATION OF CONFORMITY 98 37 EC BS EN ISO 12100 1 BS EN ISO 12100 2 BS EN 809 73 23 EEC BS EN 60335 1 BS EN 60335 2 41 89 336 EEC BS EN 55014 1 BS EN 55014 2 BS EN 55022 BS EN 61000 4 2 BS EN 61000 4 3 BS EN 61000 4 4 BS EN 61000 4 5 BS EN 61000 4 6 BS EN 61000 4 11 IT IS HEREBY CERTIFIED THAT THE STUART ELECTRIC MOTOR DRIVEN PUMP AS SERIAL NUMBER BELOW COMPLIES WITH THE ESSENTIAL REQUIREMENTS OF THE ABOVE E E C DIRECTIVES RESPONSIBLE PERSON AND MANUFACTURER STUART TURNER LIMITED HENLEY ON THAMES OXFORDSHIRE RG9 2AD ENGLAND Quality Manager Stuart Turner are an approved company to BS EN ISO 9001 2000 Manufactured on behalf of Kohler Mira by Stuart Turner Ltd Henley on Thames Oxfordshire RG9 2AD 21 SPARE PARTS Spare Parts List 465 01 465 02 465 03 465 04 465 05 465 06 465 07 465 08 465 09 465 10 465 11 872 56 O Seal Pack including Mechanical Seal componen
6. ITCH REED Z 2 2 G GREEN YELLOW BROWN L E sas 3 POWER SUPPLY Single Phase 230 VAC 1PH 50Hz Schematic Wiring Diagram Figure 8 16 COMMISSIONING Commissioning must be carried out in accordance with these instructions and must be conducted by designated gualified and competent personnel 1 Ensure pump is isolated electrically 2 Ensure that all isolating valves are fully open and pump chamber is flooded 3 Open an outlet e g shower control Water should flow from outlet under pressure of gravity Leave outlet open for a short period to allow air to be expelled from system ATTENTION The flow rate must be at least 0 5 I min for flow switch operation 4 Close outlet 5 Switch on power supply to pump If pump operates repeat commissioning steps 1 5 if this fails refer to Fault Diagnosis WARNING The motor casing can become very hot under normal operating conditions Care should be taken to ensure that it cannot be touched or covered during normal operation 6 Open an outlet and check that pump operates automatically 7 If pump does not operate repeat commissioning procedure refer to Fault Diagnosis Symptom 1 Pump does not start Pump has been inuse and stopped within short period FAULT DIAGNOSIS a No power b No low flow through terminal fittings flow switch needs typically 0 5 l min c Internal problem d Motor thermal switch tripped Rectification 1
7. Stop 33 E E Hose 4 Push the pipe firmly into the fitting until the pencil mark is level with the top of the collet and the pipe stop resistance is felt Pull on the pipe to make sure that it is secure and fitted correctly 5 To release the joint push the pipe firmly into the fitting hold the collet down and gently remove the pipe Caution Be careful when draining any residual water Electrical A Before starting work on the electrical installation ensure that the power supply is isolated Cable selection and corresponding fuse size should be chosen in accordance with the current involved and surrounding conditions All electrical installation work should be carried out by a competent person 1 The unitis fitted with 1 3 metres of supply cable Should this cable be too short a suitable length of three core cable minimum 0 75mm per core should be obtained and connected to the terminal block in the electrical box as shown in Figure 8 Remove the electrical box cover by unscrewing the four retaining screws 2 Do not use long cable lengths as this may cause substantial voltage drop poor pump performance and could also result in motor overload OPTIONALALTERNATIVE START METHOD e g Momentary Action Switch MAIN WINDING a gt e NTHERMOTRIP XC m CAPACITOR 2 START WINDING z JA E 3 2 m oO FLOW SWITCH REED 22 FLOW SW
8. allation should be carried out by a plumber or contractor who is registered or is a member of an association such as 2 6 1 Institute of Plumbing IPHE throughout the UK 2 6 2 National Association of Plumbing Heating and Mechanical Services Contractors NAPH amp MSC England and Wales 2 6 3 Scottish and Northern Ireland Plumbing Employers Federation SNIPEF Scotland and Northern Ireland 2 7 System configurations or pump applications other than those shown see Figure 3 may cause inefficient or impaired operation of the system which may damage the pump unit If the system configurations shown are not possible consult Kohler Mira for advice before commencing installation 2 8 Anyone who may have difficulty understanding or operating the controls of any shower should be attended whilst showering Particular consideration should be given to the young the elderly the infirm or anyone inexperienced in the correct operation of the controls 2 9 When the Mira Enduro has reached the end of its serviceable life it should be disposed of ina safe manner in accordance with current local authority recycling or waste disposal policy INTRODUCTION Thank you for purchasing a quality Mira product To enjoy the full potential of your new product please take time to read this guide thoroughly having done so keep it safe for future reference DESCRIPTION The Mira Enduro twin impeller regenerative pump is design
9. alve are clean Pipework configuration and or water supply conditions are allowing air induction 4 Pump is noisy in operation N B All pumps generate some noise Installation conditions may allow this to be amplified a Installation fault b Pump impeded internally Vibration from pump body transmitted through reverberant material Check pump position and pipework securings Note The pump should be free standing on its rubber feet and not screwed down Fault in supply to pump Refer to 3 Check for debris and or damage in impeller housing Mechanical seal worn damaged Renew Motor fault Refer to 5 d 5 Pump switches off while in use a Power supply fault b Water supply fault c Motor thermal switch tripped Check all fuses and RCD Ensure power is available at pump terminal box Refer to 3 Allow the motor to cool up to 1 hour Check ambient air temperature around pump does not exceed 40 C Make sure adequate free ventilation is provided minimum clearance of 80 mm around all sides of pump Pump impeded internally Refer to 4 b Symptom Rectification 5 Pump d Motor fault 1 Iffree movement switches off if motor winding and bearings are while in use satisfactory renew capacitor continued test continuity of motor windings If no continuity short circuit exists in windings non serviceable assembly
10. ed to receive a hot and cold gravity supply and provide a pressurised hot and cold supply to a mixing valve refer to Figure 2 Pump Location The pump is more effective when pushing water along a pipe rather than pulling Thus the pump is best positioned as close to the hot water or blend water source as possible to reduce cavitation air bubbles in the pipes The greater the static inlet water pressure on the pump the better it will operate see Fig 2 Thus positioning a pump at high level is not advantageous and may result in inferior performance If it is not possible to locate the pump in the preferred area due to site limitations and itis necessary to position the pump at high level or in a position above the secondary tapping that feeds the pump then there is an increased risk of air locks This risk must be eliminated Due consideration should be given to the pump position as any noise generated may be amplified by installation conditions such as reverberant panels bare floorboards etc Make sure adequate free ventilation is provided minimum clearance of 80 mm around all sides of pump The hot water storage temperature should not exceed 60 C Operation at this temperature will also reduce the rate of formation of limescale in the system The stored hot and cold water volumes should be sufficient for the required duty typical flow rates for a shower outlet are 10 I min Instantaneous or combination heaters are not suitab
11. igure Inlet Pressure Minimum inlet static pressure 0 1 bar must be maintained at all times Maximum static inlet pressure 1 4 bar Standards and Approvals The Mira Enduro complies with all relevant directives for CE marking 20 q HEAD Metres 2 0 10 20 30 40 50 60 70 FLOW l min Mira Enduro Shower Pump Performance Graph Plumbing Connections 6 1 Inlet and outlet Kohler Mira recommend only the use of their 22 mm flexible hoses The hose is fitted with plastic push in connectors on one end which must only be connected with the following a 22 mm diameter copper pipe to BS EN 1057 R250 half hard Table 3 b 22 mm plastic pipe to BS 7291 part 1 and part 2 Table 1 or part 3 Table 1 plus internal support sleeve Note The internal bore of the plastic pipe must be supported against collapse with the pipe manufacturers recommended support sleeve pipe insert Appropriate plumbing fittings from the John Guest speedfit push in plumbing fitting range Note Other manufacturers fittings are not necessarily compatible and may not provide a water tight connection INSTALLATION Key to symbols used in the system layouts amp Servicing Valve O Mixing Valve Check Valve Pressure Switch gy Float Type Automatic Pressure Accumulator A
12. ion 4x Fibre Washer L 1 x Installation and User Guide O 1 x Customer Support Brochure O 198 All dimensions are nominal and in millimetres Figure 1 SPECIFICATIONS Weight Mira Enduro Shower Pump 7 7 kg Packed AmbientTemperature The ambient temperature around the pump must not exceed 40 C Electrical 3 1 3 2 3 3 3 4 Protection the motor is fitted with a self resetting thermal overload trip Enclosure protection to IP22 Class F insulation Duty continuously rated Power Supply single phase 230 240 V 50 Hz fused supply through a double pole switched connection unit fitted with a 5A fuse and with a minimum of 3mm contact seperation gap between terminals Absorbed Power approximately 518W at 2 3 amps Water 4 1 4 2 4 3 Maximum Hot Water Temperature 65 C The use of hot water above 60 is not recommended as this may lead to an increased risk of cavitation air bubbles which increases the pump noise generated and can lead toa reduction in the ultimate service life It is recommended that the stored temperature of water should never exceed 65 C A stored water temperature of 60 C is considered sufficient to meet all normal requirements and will minimize the deposition of scale in hard water areas Delivery Rates See Pump Performance Graph This is for the pump with external flow switch only Terminal fittings and associated pipe work will reduce this f
13. ir Vent Bottle Valve Float Operated Valve Shower Handset Fixed Shower Head DHW Domestic Hot Water 15 mm Diameter Pipe 22 mm Diameter Pipe Plumbing Installation must be carried out in accordance with these instructions and must be conducted by designated qualified and competent personnel 1 ATTENTION Damage is likely to occur to the pump unit if it is allowed to run dry A minimum pump inlet head pressure of 1 metre must be ensured at all times Do not fit a non return valve in suction line inlet pipework to the pump The pump must be free to vent to the supply tanks at all times Pressure loss throughout the inlet pipework network must be kept to the minimum possible to avoid operational difficulties This will mean the use of shortest pipe runs adequately sized for the maximum flow demand and with the minimum of restriction through elbows and fittings Long pipe runs should be avoided and are best reserved for pipework from the pump outlet to shower fittings Pipework configurations which can allow air locks to form should be avoided For inlet pipework this should be achieved by utilising pipe runs with a continuous fall For outlet pipework either provide a continuously rising pipe run or if an up and over pipe run is unavoidable fit a float type automatic air vent at the highest point as shown in Figure 3 and 4 The pump must be sited as low as possible in relation to the water source and mounted in a ho
14. le It is not recommended that other services use the same feed pipework as the mixer valve or pump unit as operation problems may occur OPERATION The pump would normally start automatically when the mixing valve is set to open When the flow rate through the outlet pipe is more than 0 5 I min a magnetic float lifts and closes the contacts of the flow switch sensor When this occurs the electrical circuit to the motor is completed and the pump operates The opposite action occurs when the flow stops A vertical distance of 100 mm between the water discharge point of the shower outlet and the base ofthe cistern would typically achieve the flow rate reguired However long pipe runs or restrictive terminal fittings will increase the gravity head reguired to produce the reguired flow To overcome an initial low flow rate in the outlet pipe it is possible to by pass the function of the flow switch by the addition of a momentary action switch connected in parallel with the flow switch as shown in figure 8 When the mixing valve is set to on and the switch operated the pump will run The pump will maintain the necessary flow rate in the outlet pipe and will continue to operate until the mixing valve is set to off PACK CONTENTS M Examine the contents of the pack and tick the appropriate boxes to familiarise yourself with the part names and to confirm that all parts are included 1 x Mira Enduro Pump O 4 x Flexible Hoses Documentat
15. maintain an extensive stock of spares and aim to have functional parts available for ten years from the date of final manufacture of the product Spares can be purchased from approved stockists or merchants locations on request or direct from Customer Services Spares direct will normally be despatched within two working days Paymentcan be made by Visa or Mastercard at the time of ordering Should payment by cheque be preferred a pro forma invoice will be sent Note In the interests of safety spares requiring exposure to mains voltages can only be sentto competent persons Service Our Service Force is available to provide a quality service ata reasonable cost You will have the assurance ofa Mira trained engineer agent genuine Mira spares anda 12 month guarantee on the repair Payment should be made directly to the Service Engineer Agent using Visa Mastercard or a cheque supported by a banker s card To contact us England Scotland amp Wales Mira Showers Customer Services Telephone 0870241 0888 8 30 am to 5 00 pm Working days 4 30 pm Friday 8 30 am to 12 30 pm Saturday E mail technical mirashowers com Fax 01242282595 By Post Cromwell Road Cheltenham Gloucester GL525EP Northern Ireland Wm H Leech 8 Son Ltd Telephone 028 9044 9257 Mon to Fri9 am 5pm Fax 02890449234 24hours Post Maryland Industrial Estate Ballygowan Road Moneyreagh Co Down BT236BL Republic of Ireland Modern Plant
16. mira enduro SHOWER PUMP Installation amp User Guide THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER INDEX IMPORTANT SAFETY INFORMATION 3 INTRODUCTION 5 DESCRIPTION 5 OPERATION 6 PACK CONTENTS 6 DIMENSIONS 7 SPECIFICATIONS Weight 8 Ambient Temperature 8 Electrical 8 Water 8 Standards and Approvals 8 Plumbing Connections 9 INSTALLATION General 10 Procedure 11 COMMISSIONING 16 FAULT DIAGNOSIS 17 MAINTENANCE General 20 Storage 20 DECLARATION OF CONFORMITY 21 SPARE PARTS Spare Parts List 22 Spare Parts Diagram 23 CUSTOMER CARE Back Cover IMPORTANT SAFETY INFORMATION NA 1 Warning 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 Products manufactured by us are safe and without risk provided they are installed used and maintained in good working order in accordance with our instructions and recommendations THIS APPLIANCE MUST BE EARTHED ENSURE SUPPLEMENTARY BONDING COMPLIES WITH THE REQUIREMENTS FOR ELECTRICAL INSTALLATIONS In accordance with the current edition of The Plugs and Sockets Safety Regulations in force at the time of installation this Mira Enduro is intended to be permanently connected to the fixed electrical wiring of the mains system The Mira Enduro must not be fitted where it may be exposed to freezing conditions Make sure that any pipework that could become frozen is properly insulated DO NOT operate the Mira Enduro if it is fr
17. ozen Allow the Mira Enduro to thaw before using again DO NOT operate the Mira Enduro if water leaks from the unit maintenance will be required before the Mira Enduro can be safely used DO NOT allow the Mira Enduro to be run dry DO NOT run the pump without the guards and covers correctly fitted The flow of air around the motor must be dust free and unimpeded as the pump motor is air cooled The inclusion of a Residual Current Device RCD Earth trip with a trip current of 30mA is recommended This may already be part of the consumer unit 1 10 There are no user serviceable components beneath the cover of the Mira Enduro Only a competent tradesperson should remove the cover 1 11 If any of the following conditions occur isolate the electricity and water supplies and refer to Consumer Care on the back page of this guide 1 11 1 If the guards and covers are not correctly fitted and water has entered 1 11 2 If the guards or covers are damaged 1 11 3 If the Mira Enduro begins to make an odd noise smell or smoke 1 11 4 If the Mira Enduro shows signs of a distinct change in performance indicating a need for maintenance 1 11 5 If the Mira Enduro is frozen 1 12 Turn off the electrical and water supplies before removing guards or covers The electricity must be turned off at the mains and the appropriate circuit fuse removed if applicable 1 13 Mains connections are exposed when the guards and covers are
18. removed 1 14 Moving parts are exposed when the guards and covers are removed 1 15 Refer to the wiring diagram before making any electrical connections 1 16 Ensure all electrical connections are tight to prevent overheating 2 Caution 2 1 Readall ofthese instructions and retain this guide for later use 2 2 Pass on this guide in the event of change of ownership of the installation site 2 3 Follow all warnings cautions and instructions contained in this guide 2 4 Follow all warnings cautions and instructions contained on or inside the Mira Enduro 2 5 The electrical installation must comply with the Requirements for Electrical Installations commonly referred to as the IEE Wiring Regulations or any particular regulations and practices specified by the local electricity supply company in force atthe time of installation The installation should be carried out by an electrician or contractor who is registered or is a member of an association such as 2 5 1 National Inspection Council for Electrical Installation and Contracting NICEIC throughout the UK 2 5 2 The Electrical Contractors Association ECA England and Wales 2 5 3 The Electrical Contractors Association of Scotland ECAS 2 6 The plumbing installation must comply with Water Supply Regulations Bye laws Scotland Building Regulations or any particular regulations and practices specified by the local water company or water undertakers The inst
19. rizontal position with the outlet connection vertically upwards The operation of the flow switch will be impaired in any other position 10 6 The hot feed from the cylinder must be as illustrated in Figure 2 Side entry cylinder bosses are not recommended A drop in cylinder water level could expose a top entry immersion element Air in water gathers at the edge of the cylinder and in the centre during the heating process before travelling up the vent 7 Water pumps can develop leaks and should therefore not be located where seepage may go undetected or cause damage The pump must be installed such that it is accessible for servicing or removal When servicing or disconnecting small amounts of water may drain from the unit and pipework 8 Care should be taken when using soldering fluxes Protect the pump from damage whilst making soldered connections as some fluxes cause damage to plastic components 9 It is recommended that inlet and outlet isolation valves eg gate valves fitted to permit isolation of the pump for servicing Warning Pipe e MO GE Overflow e _ ___ 0 85 Cistern DHW Cylinder Cold Feed to 1 Feed Mixing Valve Minimum 1 5 m with other simultaneous hot water services 30 to 60 Air Separation Connections Other Hot Water Services System Layout for Mira Enduro Pump Fig
20. s guarantee is in addition to your statutory and other legal rights Before using your shower Please take the time to read and understand the operating and safety instructions detailed in this manual What to do if something goes wrong If when you first use your shower it doesn t function correctly first contact your installer to check that installation and commissioning satisfactory andin accordance with the instructions in this manual Weare on hand to offer you or your installer any advice you may need Should this not resolve the difficulty simply contact our Customer Services who will give every assistance and if necessary arrange for our service engineer to visit If later the performance of your shower declines consult this manual to see whether simple home maintenance is required Please call our Customer Services to talk the difficulty through request service under guarantee if applicable ortake advantage of our comprehensive After Sales service As part of our quality and training programme calls may be recorded ormonitored Our Customer Services Team is comprehensively trained to provide every assistance you may need help and advice spare parts ora service visit Mira Showers Kohler Mira Ltd Cromwell Road Cheltenham GL52 5EP Kohler Mira Limited The company reserves the right to alter product specifications without notice P4524 Mira is a registered trade mark of Spare Parts We
21. ts identified A Flow Switch Module Flow Switch Mechanism Flexible Hose Assembly Rubber Feet Screw Pack not illustrated PCB not illustrated Impeller Assembly Push Fit Pack for flexible hose Capacitor not illustrated Inlet Connector Housing Cable Tie 22 Spare Parts Diagram 465 09 A 465 11 23 Customer Service Guarantee of Quality Mira Showers guarantee your product against any defectin materials orworkmanship for the period shown in the Guarantee Registration Documentincluded with your shower Alternatively to confirm the applicable guarantee period please contact Customer Services Tovalidate the guarantee please return your completed registration card Within the guarantee period we will resolve defects free of charge by repairing or replacing parts or modules as we may choose To be free of charge service work must only be undertaken by Mira Showers or our approved agents in Northern Ireland and Republic of Ireland Service under this guarantee does notaffectthe expiry date The guarantee on any exchanged parts or product ends when the normal product guarantee period expires Notcovered by this guarantee Damage or defects arising from incorrect installation improper use or lack of maintenance including build up of limescale Damage or defects if the productis taken apart repaired or modified by any person not authorised by Mira Showers or our approved agents Thi
22. ure 2 11 FF Cistern Mixing Valve System Layout for Mira Enduro Pump Figure 3 222 Mixing Valve System Layout for Mira Enduro Pump Figure 4 12 10 11 12 13 14 15 Care should be taken to ensure that all pipework fittings and connections are secure This is particularly important on the pump inlet pipework network due to the potential for air to be drawn into the system should suction conditions exist All connection pipework must be adeguately and rigidly supported The flexible hoses supplied are primarily for vibration isolation and should be installed straight They may be bent to a maximum of 30 in which case they must be allowed to form a uniform swept curve and must not be stressed in any way by the plumbing configuration The pump motor is air cooled and it is important that the flow of air is not impeded around the appliance Damage to fabrics may occur if allowed to foul the motor air vents avoid a position in which the product could become frozen Do not rigidly secure pump unit to the mounting surface Install inlet and outlet pipework to meet pump flexible hoses flush through pipework fully before connecting to pump and then complete plumbing installation
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