RDK
Civil/Environmental
- Jul 19, 2001
- 1,109
My client has a facility where the water supply is from a nearby town. The water supply line is 250 mm concrete and is about 6 km from the dedicated in line booster pump which feeds from the town’s domestic supply system.
After the meter pit the line becomes a 150 mm plastic, which flows 400 m to a reservoir. From the reservoir the water is re-pressurized (and chlorine added) and fed into the facilities domestic supply system. The facility has about 600 people on site during operating hours and another 200-300 people live in the attached housing area.
The existing line will not provide enough pressure to maintain domestic flows, let alone any necessary fire flows. The pumphouse has in addition to its electric domestic pressure pumps, a diesel driven fire booster pump that will provide large volumes at high pressure. (About 2,000 USGPM at 75 psi)
We also have a dedicated firewater reservoir for the main industrial part of the facility. It consists of three large diesel driven pumps and has storage capacity of 3,500 cu m and output of around 10,000 USGMP. This water is fed through a separate high-pressure loop.
We do however want to get rid of the pumphouse and have a closed loop from the town water supply.
In order to do this I am considering a series of in-line booster pumps spaced along the supply line, and increasing the size of the feed from the meter pit to the tie in points on the facility’s domestic system. If I cannot get sufficient fire flows for the domestic system I would leave the existing pumphouse and reservoir as a domestic area fire reservoir and feed it through the existing domestic system. (Simply super chlorinate the storage water and wait for a fire when the low pressure in the line would trigger start up of the booster pump.)
Does anyone have any experience in this type of conversion or any other ideas?
Thanks in advance
Rick Kitson MBA P.Eng
Construction Project Management
From conception to completion
After the meter pit the line becomes a 150 mm plastic, which flows 400 m to a reservoir. From the reservoir the water is re-pressurized (and chlorine added) and fed into the facilities domestic supply system. The facility has about 600 people on site during operating hours and another 200-300 people live in the attached housing area.
The existing line will not provide enough pressure to maintain domestic flows, let alone any necessary fire flows. The pumphouse has in addition to its electric domestic pressure pumps, a diesel driven fire booster pump that will provide large volumes at high pressure. (About 2,000 USGPM at 75 psi)
We also have a dedicated firewater reservoir for the main industrial part of the facility. It consists of three large diesel driven pumps and has storage capacity of 3,500 cu m and output of around 10,000 USGMP. This water is fed through a separate high-pressure loop.
We do however want to get rid of the pumphouse and have a closed loop from the town water supply.
In order to do this I am considering a series of in-line booster pumps spaced along the supply line, and increasing the size of the feed from the meter pit to the tie in points on the facility’s domestic system. If I cannot get sufficient fire flows for the domestic system I would leave the existing pumphouse and reservoir as a domestic area fire reservoir and feed it through the existing domestic system. (Simply super chlorinate the storage water and wait for a fire when the low pressure in the line would trigger start up of the booster pump.)
Does anyone have any experience in this type of conversion or any other ideas?
Thanks in advance
Rick Kitson MBA P.Eng
Construction Project Management
From conception to completion
