We beat the hydraulics to death and air lock was the only logical explanation. We advised them to fill the new tower with an existing pump station (pump around the air locked areas rather than relying strictly on the static head). Once a full tower was achieved we recommended they flush and...
thanks for the responses.
i'm not counting on a siphon to make this thing work. i was mainly curious if i could expect higher flows since the discharge is lower than the pump.
Ok, so the pump does see a reduction in static head. That aside, I still need enough to get over the hump when I lose the prime. I'm not counting on a power savings. I just wanted to make sure my logic is correct so I could calculate some operating points on the curve.
There is an...
Thanks for the response. Let me be more descriptive:
The high point is about 17’ above the pump. The FM discharge is 6’ below the pump. The FM length is about 2770 ft. It pumps up and then back down to the discharge.
It's understandable that the pump will need to overcome the high point...
howdy all.
i have a small sewer lift station where the discharge point is lower than the high point in the force main and also lower than the submersible pump.
it's understood the pump must initially overcome the high point in the FM. once the FM is full, and the system is operating steady...
good advise but flushing has been done already. it's possible that some air remains in the lines but there is no water usage in the system.
if i'm taking the point correctly, air binding would reduce pipe section and result in low flow/pressure conditions while water is moving.
in this...
Thanks for the replies.
There is no water usage on this system yet until we resolve the pressure issue. It is connected to an existing tower, all the valves are open, so the pressures should reflect the static head of the existing tower. That's the problem, it's not even close.
An...
1. What is the ground elevation at the existing tower and at the proposed tower.
Ans - They vary slightly but the overflows of both tanks are the same. The ground elevations have been verified by our surveyor to make sure we didn't have a bust.
2. What is the overflow at each point in the...
I’m experiencing a low pressure issue in a new rural system recently installed. The new expansion includes a standpipe. The pressure at the new standpipe location is reported as 5psi. The new standpipe height will be approximately 118 ft therefore requiring 51psi to fill. 5psi isn’t good...
I'm curious if anyone has experienced a strong benefit from cathodic protection in a elevated storage tower? This is as new tower and we're specifying a very good application of Tnemec paint.
I’m concerned this will become a maintenance issue for the client. Also, should we expect a...
I'm designing a 14 home water distribution system for a subdivision. It's a 50gpm well feeding into a tank house. Pressure, storage, and Cl contact time will be accomplished using two 1400 gallon pressure tanks operated in series.
I plan to inject sodium hypochlorite into the system prior...
