Hey guys,
Thanks alot for your responses. Synopsis: solvent weld is the worst type of joint to use in sewers within earthquake zones. Gasket joints aren't too good either but perform better than solvent weld joints except in extreme earthquake events. Cool.
Allie.
Hi everyone,
I am based in the Caribbean. Can anyone tell me why ASTM D3034 and ASTM D2855 would not be applicable for this region? There are no local sewer jointing standards but the local Approval Agency seems to be against solvent joints. Is there substantial evidence that these joints...
Hello everyone,
Thanks for all of your comments. Bimr special thanks to you for the links you posted. We would prefer to go with the 10 feet separation suggested by GoldDredger but many of the roads here are too narrow for that. We seem to be heading toward 6 feet and negotiations are...
Hi guys,
Does anyone know what the setback distance between a gas line and sewer line should be? Recently, we encountered a gas line about 2 inches away from one of our sewer lines.
We know the sewer line was there before the gas line so they infringed on our space. However, we can't find...
Hi guys,
Anyone experienced with surface aerators for aerated lagoons? How do you space them?
I've heard that they should be placed at the corners and middle to prevent dead zones but Mara has warned against spacing them too close because the eddy interference leads to reduced oxygen...
gt5879c,
To answer your question directly: yes, the Hst value is still the distance from the water level in the WW to the pump centerline.
Regards,
Allie
jgailla,
On your second point, forgive me but I'm confused. If the pump is designed to overcome a static head of 20ft, how would it possibly overcome 30ft? If it does, wouldn't that reduce the design life of the pump anyway? Please explain.
On your first point, I have new info from this...
Hi guys,
I have two questions for you:
(1) Should the static head for a wet well pump be checked from the level of the 'pump-on' float switch or from the 'pump-off' float switch?
(2) If there are points along the pressure main where the pipeline elevation drops below the elevation of the...
Stanier,
Omigosh...Thanks a million! I didn't get flyps but in my search, i stumbled upon PUMP-FLO.com and this site is amazing...it has got a pump selector for every manufacturer i've ever heard of and many, many more.
So, once again, thanks for the heads-up on the free software...
I'm a new engineer who is just getting into designs.
I have to design a lift station to handle 0.127cu m/s of flow. I've calculated the horsepower requirement for the pump(s) but folks at the office think i shouldn't have. They say all i need to give the manufacturer is the flow and TDH.
Is...
Thank you Artisi (and everyone else). What I wanted to know in particular is whether you've used that TDH formula on sewage pumps as opposed to water pumps. The density of sewage is slightly higher and I wanted to know if the 3960 constant was computed taking this into consideration.
Thanks...
I'm a new engineer who is just getting into designs.
I have to design a lift station to handle 0.127cu m/s of flow. I've calculated the horsepower requirement for the pump(s) but folks at the office think i shouldn't have. They say all i need to give the manufacturer is the flow and TDH.
Is...
Hello everyone:
I work for an approval agency. We have this development comprising 140 single family units. The development was given approval for use of a double compartment septic tank, sand filter trench and chlorine contact chamber (Clayey Soils). One problem is that the lot size is...
