FLUSHING & CLEANING | Pre-Works Check List

This flushing & cleaning pre-works checklist can be used and completed throughout the project and its different stages covering:

• delivery,
• storage,
• installation &
• pre-commissioning/pre-functional works

Once the pre-functional checks have been completed, including all equipment and ancillaries related to the flushing and chemical cleaning works, the full functional testing/commissioning can be conducted.

This checklist should be used and completed throughout the project, and its different stages, delivery, storage, installation & pre-commissioning, before the flushing works occur.

List of Temporary Equipment

When completing the flushing and cleaning works, the following equipment could be used:

• Temporary Water Pump
• Temporary Power Board
• Variable Speed Drive
• Temporary Electrical Cable
• Temporary Hoses
• Temporary Water Tanks
• Temporary Side Stream Filter
• Spare Filters
• Chemicals
• Dosing Pot

The below checks will cover the above equipment and chemicals.

Delivery Inspection

Once the Flushing Equipment arrives at the site, usually delivered by a transport company, and before being accepted into storage, the following should be checked with the driver.

Any damage that is noted should be reported to the manufacturer/supplier within 3 days in writing supported with photographs.

Ref	Inspection/Task
1	Supplier's consolidated delivery ticket is available, showing all equipment, chemicals, and ancillaries for inspection and being used to check against.
2	A copy of the order that was sent to the supplier is available for reference and is being used to check against
3	Equipment and ancillaries are packaged and crated in separate boxes, for maximum protection
4	Chemicals are supplied in line with COSHH requirements and datasheets.
5	Dosing pot is the correct size
6	The pump & pump motor nameplate and details match the purchase order and are supplied on base for mounting.
7	All pipework connections are the correct size.
8	Flanges and Pipework connections are undamaged
9	Pump/s are dry internally
10	Spin the pump impeller to ensure it is not damaged and out of line
11	The external casing of the pump/s are undamaged
12	All base frames, if ordered are included
13	Temporary electrical panel supplied for connection of the temporary pump.
14	Temporary electrical cable correct type, size, and length.
151	Temporary water tanks are the correct size, with correct connections.
16	Temporary side stream filters are the correct size and connections.
17	Spare filters delivered for temporary side stream filter equipment
18	All hoses are correct size Pump SuctionPump DischargeMains WaterDrainage
19	Temporary double regulating valve correct size and flow rate.
20	Isolation valves correct size
21	Strainers correct size
22	Delivery protection is dry where included.

Storage Inspection

Storage Area

If the temporary equipment and chemicals are to be placed into storage on site prior to installation there will be an inspection completed checking the following.

Ref	Inspection/Task
1	The area is internal and will not be affected by the weather. [if the pump is not rated for external use]
2	The surface where the equipment is to be placed is flat.
3	The area is well covered and protected.
4	The area is well ventilated and has no risk of high humidity.
5	The area is clean & dust-free.
6	All chemicals can be stored in line with their COSHH Datasheet and manufacturers' requirements. Bunded area, well ventilated etc

Storage of the Temporary Equipment & Chemicals

Prior to the temporary equipment being placed into storage, the following should be checked.

Ref	Inspection/Task
1	Equipment will not be stacked.
2	Equipment will not have materials stacked on it.
3	All ancillaries will be placed in a safe and secure location, so items do not go missing or get damaged.
4	All original packaging is intact and not removed.
5	Pipework/connection caps protecting the flanges of the pump are not removed.
6	The equipment will be raised from the floor to allow airflow and stop the risk of water ingress.
7	All chemicals are stored in line with their COSHH Datasheet and manufacturers' requirements.
8	Spill kit available for any issue with the chemicals.
9	All PPE required for chemicals available.

Pre-Installation Inspection

Prior to the temporary equipment being installed the following should be checked.

Ref	Inspection/Task
1	The plinth/base is ready, flat, and level & can bear the weight of the pumps, temporary panel, and temporary water tanks.
2	The room/area is dry and watertight.
3	The area being installed is not prone to flooding or ponding of water.
4	The room/area is clean and dust-free. If there is dust/construction work, then the temporary pumps and tanks should be protected.
5	Any pipework connections, can be easily connected with the correct radius and independently supported, not supported by the pump/s.
6	Check to ensure that all connection kits containing - gaskets, bolts, are available to allow bolting up of the temporary pumps to the system.
7	Remove all transport feet and bolts.
8	There is an available electrical supply for the pump panel.
9	There is an independent water supply, with a sufficient volume flow rate and is independent of the site water supply. The water will not be interrupted unless agreed with the flushing contractor.
10	There is independent drainage, with a sufficient volume flow rate and is independent of the site. The drainage will not be interrupted unless agreed with the flushing contractor.
11	Pipework system provides connections that are the correct size for the temporary side stream filter.
12	The pipework system provides connections that are the correct size for the temporary dosing pot.
13	There will not be any trip hazards from the installation of the temporary equipment and pipework.
14	All flushing loops and bypasses can be installed with correct valve configurations, as per the method statement.

Pre-Works Inspection

Once the temporary equipment and chemicals have been installed and prior to flushing works taking place, the following will be checked.

Documentation

Ref	Inspection/Task
1	Method Statement and Functional Test Procedure approved by the client team.
2	Any flushing and cleaning strategy documents are approved by the client team.
3	Temporary setup of equipment drawing/information approved by the client team.
4	Any permits requested and issued in time for completing the works.
5	Weld testing of pipework completion documentation available.
6	Pressure Testing of pipework completion documentation available. Pressure testing will usually consist of all pipework up to the flushing loops. Once flushing, cleaning, and backflushing has been completed, there will be a full pressure test of the complete system.
7	Pump testing completion documentation is available.
8	Electrical test records are available for the temporary pump & side stream filter.
9	Operation and startup manual for the Pumps available.

Pumps/Pipework and Ancillaries

Ref	Inspection/Task
1	Ensure that the temporary pump is installed in the correct orientation to the system pipework and the impeller rotates in the correct direction.
2	Ensure temporary pump/s are level.
3	Ensure all gaskets are installed and sealed.
4	Ensure that all bolts are installed as per the manufacturer’s instructions.
5	Ensure temporary pumps are aligned in accordance with the manufacturer’s instructions.
6	All vibration mounts installed
7	Seismic restraints, where required, installed.
8	All components including valves and controls are labeled.
9	Ensure that the pipework and connections are the correct size and in line with the drawing.
10	Ensure the installation of the pipework will not put stress on the Pump connections or create vibrations.
11	Temporary pipework that is connected to the pump/s has been pressure tested.
12	Pumps have been primed in line with the manufacturer’s requirements.
131	The system has been bled and the air removed.
14	Pipework is insulated and vapor sealed, where required.
15	All pressure gauges installed, and display scale as per design requirements.
16	All valves/control valves are installed and incorrect direction
17	All commissioning devices are installed
18	All Strainers are installed and inspected to ensure the mesh is clean.
19	All expansion/rubber bellows are installed at least 1.5x the pipe diameter away from the pump for the inlet and the outlet.
20	A temporary cold-water main has been connected with an isolation valve for control, in line with the method statement.
21	The temporary drainage main has been connected with an isolation valve for control, in line with the method statement.
22	A temporary side stream filter has been installed and is able to operate.
23	Spare filters are available for temporary side stream filters.
24	A temporary dosing pot has been installed to allow the introduction of chemicals during the flushing process.
25	Temporary water tanks were installed and connected in line with the method statement.

Chemicals for Flushing

Ref	Inspection/Task
1	All chemicals are available as per the method statement.

Electrical General

Ref	Inspection/Task
1	Temporary pump/s and components are fully earthed in line with the manufacturer’s instructions.
2	Earthing has been tested.
3	Emergency disconnect installed for each pump in line with NFPA/local code requirements.
4	Electrical voltage from the site matches the pump required voltages.
5	All cabling is installed and connected on the correct containment and not damaged.
6	All cabling has been tested/torque tested.
7	A temporary distribution panel has been installed.
8	The temporary distribution panel has been electrically tested.
9	All electrical cabling is labeled in line with the project naming convention.

Variable Speed Drive

Ref	Inspection/Task
1	A temporary variable speed drive has been installed.
2	Temporary variable Speed Drive [VSD] has been electrically tested
3	Temporary variable speed drive has been functionally tested

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Flushing & Chemical Cleaning Pre-Works Checklist [PDF]

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Pipework Flushing & Cleaning Pre-Works Checklist [Microsoft Word]

Pipework Flushing & Cleaning Pre-Works Checklist [Microsoft Excel]

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