Venting a liberty 404 ejector pump

Reply

  #1  
Old 12-25-13, 02:01 PM
T
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 2
Received 0 Votes on 0 Posts
Venting a liberty 404 ejector pump

I just got the liberty 404 ejector pump and have a question about venting.

Before installing the pump in our basement, I came to the forums to try to understand the correct way to set up the unit. From what I'm reading here is that the vent's purpose is to prevent cavitation and odors from escaping into the living area.
With the liberty pump there are actually two vents, one on top and one on the side of the unit. If I were to screw in 1.5" PVC to the top of the unit, this still leaves an opening on the side where odors are sure to escape. So what would be the purpose of putting in a vent at all?

After reading Liberty's manual, they say "Provision is made for a vent (almost making the vent sound optional) to allow for high suds conditions". While setting up and installing this unit wont be a problem, I'd be very thankful if someone would explain the logic of this vent dilemma.

Thank you in advance, Steve
 

Last edited by teeb57; 12-25-13 at 02:16 PM.
Sponsored Links
  #2  
Old 12-25-13, 02:59 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 56,979
Received 825 Votes on 775 Posts
Welcome to the forums.

I'm not the pro in this forum but I have set up those ejection pumps. There are two openings in the top and one in the side.

The side opening is for the sewage into the unit. The top openings are one for vent and a discharge line. As far as I know... the vent is for escaping gasses and has nothing to do with cavitation/suds.



Pete Name:  xmas_attach-22947.gif
Views: 987
Size:  332 Bytes
 
  #3  
Old 12-25-13, 07:43 PM
T
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 2
Received 0 Votes on 0 Posts
Actually, you're right. I miss read the discharge/vent signage on the unit. Either opening can be used for inlet or venting. Thank you for that!!

However, the manual says no AAV's are to be used. Since AAV's restrict airflow in two way movement of air to only one way movement, I can only assumed this was to prevent cavitation. The manual also says the vent is to help augment extra volume of air for high suds conditions. I have no idea why suds play into the equation. Thanks for taking the time to respond Pete and Merry Christmas to you.
 
Reply
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: