• RE: How can I reduce my velocities in a watermain when the source is at 293m and the fire flow demand elevation is at 248m?

    Hello Abe, You can place a PRV by selecting the valve dropdown in the layout toolbar and then choose PRV. Alternatively, you can go to the Tools menu, select Layout, then PRV. In the properties grid for the PRV, take a look at the Initial Settings…
  • WaterCAD 3D view

    Hello. Is there any way to get 3D view of WaterCAD model with pressure in every node showed as 3D cylinder or column sized depending on pressure value? It used to be in CyberNet water modelling software, but I can't find it in WaterCAD now. Thank…
  • what is the difference between ''pressure'' and ''pressure head''

    Hello, what is the difference between ''pressure'' and ''pressure head'', according WaterCAD Best regards
  • Darwin Pump Scheduler: Varying Pump Schedule

    Hi! Is there a way to instruct Darwin Scheduler to use different target pressures at different times? For example, I want to set a high pressure during day and a lower pressure target at night. Right now, I have to resort to manually tweaking the optimized…
  • Static pressure head calculation

    Hello, I am trying to find the static pressure in each node inside a network. Maybe I am not getting rigth the concept. All I have its the dynamic pressure At nodes wich is the hydraulic grade less the headloss but what i also want its the static pressure…
  • Re: Connecting Pipes with different pressures

    The connection betwen the 8 in and 12 in pipes sounds pretty straightforward. I would guess the way you have it set up in the model is fine, so long as it is a close representation of what's actually in the ground. If you have zero flow through the check…
  • Solvers - General Question - SewerGEMS

    Using: SewerGEMS V8i, Series 3, 08.11.03.83 1. I used to model lift stations with wet well with a short fat gravity pipe between the wet well and pump. Under the GVF-Convex solver, this is not longer the case. I am curious to know what is the reasoning…
  • Colour Coding Pipe Pressure in Watergems

    I am trying to create a colour coding in watergems. Similar to assigning diameter, velocity and flow colour codings to pipe elements, I would like to do the same indicating pipe pressure. I know that I can use a colour codings on nodes to do this but…
  • Culvert Failure Analysis -- Which Program?

    I am looking to model a 72-inch CMP storm drain failure due to excessive thrust I suspect. I want to simulate the pipe failure, sink hole formation, the water surfacing, and the subsequent scouring. It's a bit of a tall order and will require substantial…
  • pressure zone

    please help me with perform and understand pressure zone how
  • Hammer Analysis in Raw Water Transmission System

    I'm trying to evaluate the need for surge protection at new well locations in a raw water transmission system. I have a network of 6 wells all pumping to the water treatment plant. I'm new to Water Hammer and surge analysis so I'm just looking for some…
  • Re: HOW MODEL COMBINATION AIR VALVES?

    If someone wants to model only the cascading flow downstream of an air-valve; that is, the transitional pressure to gravity type flow that might set up in a gravity trunk main or a sewer forcemain, they should take a look at the new WaterGEMS/WaterCAD…
  • Hammer results interpretation

    Hello I have modeled a raw water pumping line from a low to a high elevation using Hammer to compute up surge and down surge. My problem is even when using a hydronumatic tank i am getting negative pressures in the pressure envelope at the tail…
  • Re: Pressure and Pressure Head, what are the differences?

    " Pressure head " is the " Pressure " divided by the specific gravity of your fluid, which you can change in the calculation options. So, they will only be equal if the specific gravity is 1.0 (using the same units for both, such as feet or meters) …
  • Hazen-williams formula

    Hello Akshaya Niraula, Thanks for your response to my previous questions, I would like o know about the coefficients applied in Hazen-williams formula by WaterGEMS, Can you pls tell about the differences of formula that WaterGEMS applies with…
  • Re: negative pressures at junctions

    If the junctions are gravity fed, Tom's suggestions are still good but you need to change hte wording a bit. If the pressures are always negative, no matter what the demand, then check the HGL of the tank that feeds the zone, and check the elevation…
  • Re: Pressure and Pressure Head, what are the differences?

    I have a slight correction to Jesse's post...pressure head is pressure divided by specific weight (not specific gravity). Specific weight of a fluid = density of the fluid x acceleration due to gravity. Pressure head is convenient because it is…
  • Re: Field pressure readings upstream and downstream of PRV. HGL or not?

    Normally the gauges will give you gauge pressure. You need to accurately measure the gauge's elevation, and add that to the pressure reading to get the HGL. Also, if the gauge measures pressure (e.g. in kPa), you will need to convert that to pressure…