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  1. gibfrog

    8" NSF 61 Full (80%) Port Valve MJ

    Thanks Clifford H Laubstein FL PE 58662
  2. gibfrog

    8" NSF 61 Full (80%) Port Valve MJ

    More details - the USCOE Fort Cambell design guide recommends 2. Type V132 Resilient Seated Gate Valve 3 Inches to 20 Inches, for Buried Service: a. Iron body, resilient seat, bronze mounted, mechanical joint ends,non-rising stem, in accordance with AWWA C509, 2-inch operating nut, design...
  3. gibfrog

    8" NSF 61 Full (80%) Port Valve MJ

    Apparently a Wedge Gate valve is the answer. Any suggestions regarding full port mid-range NSF61 wedge gate valves? Clifford H Laubstein FL PE 58662
  4. gibfrog

    8" NSF 61 Full (80%) Port Valve MJ

    I am looking for an 8" NSF 61, full (or 80%) port valve, like a ball or an eccentric plug valve with Mechanical Joints. I found tons of =< 4" NSF 61 brass/bronze ball valves and tons of non NSF 61 Stainless Steel 8" ball valves. I found one 8" eccentric plug valve...
  5. gibfrog

    Looking for an NSF Pulse Multi-Jet Water Meter

    Bimr - Thank you very much. Badger has multiple potential solutions, the cheapest one is $572 plus tax. Badger Model M25, bronze meter.....................$ 62.90 Badger Model ER-10, meter mounted unit.............$509.00 I have also placed a call into Pulsafeeder Chem-Tech, their tech support...
  6. gibfrog

    Looking for an NSF Pulse Multi-Jet Water Meter

    I forgot, there are cost constraints. The Seamatics water meter is under $400. Clifford H Laubstein FL PE 58662
  7. gibfrog

    Looking for an NSF Pulse Multi-Jet Water Meter

    My design/build contractor wants to use a Seametrics MJ Series Pulse Meter on a small Non-Transient Non-Community, Public Water System, Water Treatment Plant. It is great but, it is not NSF compliant and not suitable for potable water applications per the Seametrics engineer. Here is the...
  8. gibfrog

    Pond Drawdown Time 48 Hours after event

    Did any nearby properties develop under the same stormwater criteria? How did they solve this problem. Did you ask your city stormwater engineer for advice? For public safety (ie FAA requirements), the city may be willing to modify their attenuation requirements or have a "design exception"...
  9. gibfrog

    Sta-Rite &gt; 50 gpm Submersible Well Pumps not NSF Certified

    Bimr: I should have been more specific. I have been in direct contact with the manufactor. ----------------------- I consider a pump that is marketed as "Ideal for residential, industrial, commercial, multiple housing and farm use." to be considered suitable for potable use since I will only...
  10. gibfrog

    Sta-Rite &gt; 50 gpm Submersible Well Pumps not NSF Certified

    That may be correct, but I asked in several emails, why these pumps were not NSF certified. I would assume that if it was merely cost or some administrative detail, they would have told me so. Here is a 27 page list of the many certified Sta-Rite pumps...
  11. gibfrog

    Sta-Rite &gt; 50 gpm Submersible Well Pumps not NSF Certified

    A previous engineer called for an 4", 7.5 hp 90GPM Sta-Rite L90HF75 well pump for public water system serving a small (<400 unit) residential development. The well pump was installed but never permitted with the local Health Department (a delegated agency by the FL State DEP.) I am trying to...
  12. gibfrog

    Cross slope at off-street Parking Lot

    In the "poorly drained Florida coastal flat lands", 0.5% cross slope is consideed minimum. Tolerable "bird baths" are 1/4" deep. The steeper the slope, the less "bird baths". Many "big box" retailers that nationally have a 2% minimum sople allow a 1% in the "poorly drained Florida coastal...
  13. gibfrog

    Measuring Surface Infiltration/Runoff?

    1) How thick is the gravel? Depending on the grading/Local Authority Having Jurisdiction, I assume a 30% - 40% voids volume. Once thes voids fill, the additional rainfall either percolates or runs off, depending on the underlaying soil & ammount of rainfall. 2) As CGV writes, compaction kills...
  14. gibfrog

    Sewage Pump Station throttling mechanism

    BIMR - You are also making some inncorrect assumptions. Yes, I misunderstood the plant size, it is at least 105,000 GPD. However, without more information about the reported "shock loading problems at the plant", the proper course of action is indeterminate. You understood the issue as a...
  15. gibfrog

    Sewage Pump Station throttling mechanism

    1) A WWTP has both a Hydraulic Capacity, a BOD Capacity and a Solids Capacity (here in Florida, also a denitrification capacity). For example the typical extended aeration WWTP has a 18-36 hour hydraulic retention time for the aeration basin, based upon the influent loading. The BOD capacity...
  16. gibfrog

    Sewage Pump Station throttling mechanism

    I do not think that this is an appropiate application for a VFD. Using the guidelines from 10 States Standards - Recommended Standards for Wastewater Facilities, look at page 10-6. www.broward.org/waterservices/states_standards_wastewater.pdf Here are some preliminary numbers, assuming a...
  17. gibfrog

    Accepting then declining

    I agree with GregLocock. Either your word is your bond or not. Sometimes you will "lose" money on a job or leave money on the table. Oh well...... Clifford H Laubstein FL PE 58662
  18. gibfrog

    Sewage Pump Station throttling mechanism

    Flow Equalization. A. You provide about 6,000 gallons net of flow equalization tank storage and pump your effluent out at a constant rate for 18 hours - from 6 am unitl 12 midnight. You will have septic conditions and will need to consider odor issues. or B. Convince the WWTP that they need...
  19. gibfrog

    Brick wall for flood protection

    I would follow dicksewerrat's advice. Raise the house above the flood level. The higher the better. You can have a garage and storage under your house if you raise it ~8'. 4-5 Feet of fill is almost a "no brainer" Think majestic steps leading to a front entrance way feature with columns...
  20. gibfrog

    STEP system discharge to existing MH - Gas problems?

    I forgot to mention that the septic tanks will need proper maintenance to fuction properly. If you do not maintain them, your effluent pumps will fail unless you use grinder or solids handling pumps, you will lose your primary settling volume to solids and you will lose your retention time to...

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