Syphoning effect on pipework 1

[ER_Azza]

Hi All

We had recently changed our pump (for our effluent system) from a screw pump (BLUE PUMP) to an air operated diaphragm pump. Simple setup.

When we stop the diaphragm pump, the discharge pipe maintain its syphoning effect and still pull the effluent from the suction side (due to the level in Pit 2 and RED PUMP running). We do not want to drain the effluent in Pit 1 to dry.

Most simplest option is to drill a hole (or installed a vent) at X, inside pit 2 but way above the bottom of the first pump discharge.

What's your thought?

 

[itsmoked]

Why would it matter what's in the flow if the breaker is put up above the actual flow with a few feet of pipe?

Keith Cress
kcress -

http://www.flaminsystems.com

 

[1503-44]

$hit happens ???

 

[TiCl4]

Why not put the vacuum breaker on top of a stand-pipe on the vertical section that drops down into the second tank? The height of the stand pipe can be adjusted to avoid any splashing potential. The stand pipe can be flanged to aid in removal and cleaning in the case of buildup. Locating it on the vertical down section should also mean that gravity will aid in removing any potential clogs. Lastly, if you can accept a small amount of water addition, you can put a trickle flow of water in at the top of the stand-pipe in a weir design to keep the sides of the standpipe constantly wetted, minimizing the buildup potential.

 

[bimr]

Another solution is a small diameter bleed off. When the pump stops the siphon will break if the end of the pipe is above the liquid in the first tank.

 

[LittleInch]

For waste water the small diam bleed is more likely to clog than the vacuum valve IMHO...

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[bimr]

Orenco makes effluent systems including anti-siphon valves:

Orenco

Orenco® Systems HV200AS Discharge Anti-siphon valve, 60 psi

 

[ER_Azza]

Hi All

Thanks for all the feedback and advise.

Yes, I finally put an inexpensive vacuum breaker on the line.
There is a high point on the pipe which I managed to install a 1" vacuum breaker.
That did the job.