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  1. drain

    surge relief valve

    Gere's my scenario: Water transfer pump. Static head on the system is about 395 feet, which we're pumping (VFD) against to deliver water to a tank some 1.4 miles away. Using a GA Industries 4" surge relief valve, low velocity of 5 fps (1650 usgpm), to be set to discharge to waste (may...
  2. drain

    how learn prepare p+id

    Anyone have any resources on the above? My goal is to learn how to do p+ids for pumping stations, water treatment plant, etc. Thanks (also posted in water treatment discussion)
  3. drain

    how learn prepare p+id

    Anyone have any resources on the above? My goal is to learn how to do p+ids for pumping stations, water treatment plant, etc. Thanks
  4. drain

    copy column widths - Excel

    Is there any way to copy the column widths when doing a copy in Excel?
  5. drain

    how find cells requiring a linked file?

    I've changed the name of a linked spreadsheet and want to find the cell that it was calling the link. How do I do this?
  6. drain

    how date stamp only when changes occur?

    Hi folks I open a spreadsheet, leave it open for a while and later want to close it. Sometimes I make changes to it and sometimes I don't. I've got the NOW() command in a cell, so every time I go to close the sheet I'm promped if I want to save the changes. The NOW() command that is forcing the...
  7. drain

    to jockey or not to jockey

    We're designing a pump station which has both domestic supply pumps and a diesel engine fire pump, discharging into the same potable distribution network--there's no separate pipe for the fire system. There's also an important sprinklered building on site fed through the network. I suppose that...
  8. drain

    mag flow meter justifications

    Hi, Our approving authority doesn't put flow meters in their district water pump stations, and there are no residential meters either -- we all just pay a flat rate for water. I recommended a magnetic flow meter on the discharge mainfold for a pump station design because I want it for...
  9. drain

    VANE SWITCH

    Can anyone give me a supplier of a vane switch. Need for control of my potable water pump. Want to shut it down at specified flow. Tried Flocat but their switch doesn't operate in my range of flows unless I go to a 8" discharge pipe from a 4" pipe, which I'd prefer not to do. Thanks...
  10. drain

    We're pumping potable water from a

    We're pumping potable water from a tank through 2 mains into a distribution system & have separate fire flow pumps. The distribution lines are as follows: Main #4 Qmax=1160 gpm, Hmax=340 ft Main #5 Qmax=160 gpm, Hmax=110 ft We planning to use hydropneumatic tanks 10 time the size of Qmax, so...
  11. drain

    buried pipe supports steep slope

    I'm looking for references to design anchor blocks below the bell end of a pipe on a steep slope.
  12. drain

    POSTED ALSO IN SPREADSHEETS FORUM

    POSTED ALSO IN SPREADSHEETS FORUM I've a spreadsheet for plotting pump curves on one chart but the problem is in adding the abscissa (x, flow) values for the same ordinate (y, head) values. The two curves are not input with common y-values. The fastest way seems to be to plot out the two pump...
  13. drain

    graphing pumps in parallel

    I've a spreadsheet for plotting pump curves on one chart but the problem is in adding the abscissa (x, flow) values for the same ordinate (y, head) values. The two curves are not input with common y-values. The fastest way seems to be to plot out the two pump curves on one chart then create the...
  14. drain

    inlet location to tank

    Hi, 1) We're designing a 1250m3, 2-cell un-baffled rectangular ground level concrete tank, 3.6m is the TWL. We're debating the issues of inlet location with respect to water turnover and chlorine residual. We've currently got our inlet discharging through an elbow downward at TWL. Any comments...
  15. drain

    variable suction conditions

    Hi My water supply for a land development project is described below: Potable water supply from a 18 in. aqueduct For 2 weeks per year during maintenance, positive suction is 15 - 20 psi For 50 weeks per year, positive suction is 90 - 120 psi Discharge head is 160 psi, discharging directly into...
  16. drain

    well field pump sizing

    I'VE POSTED THIS ALSO IN THE PIPING FORUM. Does someone with experience in parallel pump operations, using well fields and two discharge heads have time to look over my procedure below and comment. Or direct me to resources where I can check myself. I haven't done a parallel operation with 2...
  17. drain

    well field pump sizing

    Does someone with experience in parallel pump operations, using well fields and two discharge heads have time to look over my procedure below and comment. Or direct me to resources where I can check myself. I haven't done a parallel operation with 2 discharges before and may have missed a few...

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