Operating the water pump

Recycling water in the stonemasonry workshop

Operating the water pump

• Water is needed during stonemasonry operations to – Control dust hazard– Cool cutting and grinding tools– Lubricate honing and polishing processes– Clean work area

• Recycled water is contaminated with sediment and must NOT be allowed to exit the property

you must complete an induction before using this equipment

Operating the water pump

• The pump recirculates water around the stonemasonry wet area

• The water returns to the sump

• The sump acts as a water reservoir and settlement pond for the sediment

• The sump is topped up with town water during use

• The sump is accessed by a lid

Operating the water pump

• The electrically powered pump draws water from a sump, through a foot valve inlet

• The sump holds approx. 3600 litres and requires occasional topping up

• The water level must always be above the foot valve inlet, to avoid “cavitation” (sucking air)

• The top up tap maintains the water level• Closing the top up tap after use prevents water

wastage in case of hose failure• Opening the pump outlet prevents overheating

the pump when it is running

Operating the water pump

• Water supply must be– Reliable

• Keep the sump full of water• Maintain the pump

– Clean• Clean the filters regularly• Empty sediment from the sump regularly

– Environmentally friendly• Ensure NO overflow to stormwater or sewer• Minimise water wastage

Operating the water pump

Operating the water pump

About 450

About 450

Shutting the pump down

• It’s easy – just reverse the start up order

Review

1. Why is water needed in the stonemasonry workshop?

Review

1. Why is water needed in the stonemasonry workshop?

• To cool, lubricate and clean during stonemasonry processing

• To control dust

Review

2. Why must the sump water level be maintained at near-full?

Review

2. Why must the sump water level be maintained at near-full?

• To avoid cavitation (sucking air)

Review

3. Why is it important to prevent overflow into drains?

Review

3. Why is it important to prevent overflow into drains?

• So that contaminated water does not leave the property via stormwater drain or sewer

Review

4. How is sediment removed from the water?

Review

4. How is sediment removed from the water?

• By settlement in the sump

Review

5. List the start-up procedure in correct order

Review

5. List the start-up procedure in correct order

• Open top up tap

• Open pump overflow halfway

• Switch pump on

Review

6. What must be checked before starting the pump?

Review

6. What must be checked before starting the pump?

• Check that the water level is well above the foot valve

Review

7. Why is it important to close the top up tap during shut down?

Review

7. Why is it important to close the top up tap during shut down?

• To avoid water wastage in case of hose failure

Review

8. When the pump is running, why must the pump outlet be open?

Review

8. When the pump is running, why must the pump outlet be open?

• To avoid overheating the pump

Review

9. The sump lid should be kept closed at all times – except when….

Review

9. The sump lid should be kept closed at all times – except when….

• Checking the water level

• Maintaining the pump

• Emptying the sump

Review

10.List the shut down procedure in correct order

Review

10.List the shut down procedure in correct order

• Switch pump off

• Close pump overflow

• Close top up tap