Small Ejector Pumps. - Page 2 - Plumbing Zone

**ILPlumber** · 03-01-2010, 07:13 PM

Quote:

Originally Posted by house plumber

Little Giants.

Attachment 5156

Why is the sink drain not tee'd into the vent pipe thus eliminating the s-trap?

Pipe Rat · 03-01-2010, 07:18 PM

Quote:

Originally Posted by Matt

Why is the sink drain not tee'd into the vent pipe thus eliminating the s-trap?

What he said?

TheMaster · 03-01-2010, 07:41 PM

Quote:

Originally Posted by Matt

Why is the sink drain not tee'd into the vent pipe thus eliminating the s-trap?

On those pumps the vent push's air out...thats why you cannot use a mechanical vent on those. You shouldn't make it a vent wet if it push's air out of the vent to work...you will reduce its pumping capacity. I would have used a couple of tee's and put a mechanical vent on top of them. I assume the pipe thats tied into the top of that 2" combintaion is a similar fixture on the opposing wall and they are using one pump to serve both.

TheMaster · 03-01-2010, 07:47 PM

looking at it again it seems you could have piped both fixtures into the vent portion and then used the original inlet to loop back above the highest fixtures rim and tye back into the vent making a loop and eliminating the s-trap and the mechanical vent.

**ILPlumber** · 03-01-2010, 07:54 PM

Quote:

Originally Posted by TheMaster

On those pumps the vent push's air out...thats why you cannot use a mechanical vent on those. You shouldn't make it a vent wet if it push's air out of the vent to work...you will reduce its pumping capacity. I would have used a couple of tee's and put a mechanical vent on top of them. I assume the pipe thats tied into the top of that 2" combintaion is a similar fixture on the opposing wall and they are using one pump to serve both.

Are you drunk?

The only air the vent pushes out is the air that is slowly displaced as the pit is filling.

That install would be a non-code compliant here.

[redneck voice] Whatcha need to do is get ridda that vent and stack 2 tees wiff an AAV on top of em. UH-HUH, Thas right[/redneck voice]

TheMaster · 03-01-2010, 08:01 PM

Quote:

Originally Posted by Matt

Are you drunk?

The only air the vent pushes out is the air that is slowly displaced as the pit is filling.

That install would be a non-code compliant here.

[redneck voice] Whatcha need to do is get ridda that vent and stack 2 tees wiff an AAV on top of em. UH-HUH, Thas right[/redneck voice]

You dont know what your talking about. It displaces equal air to how much water your filling it with.......and the way you want it piped its vent would be full of water when the sinks dumped....not allowing the air displacement and either not work at all or have poor pumping performance.

**ILPlumber** · 03-01-2010, 08:27 PM

Quote:

Originally Posted by TheMaster

You dont know what your talking about. It displaces equal air to how much water your filling it with.......and the way you want it piped its vent would be full of water when the sinks dumped....not allowing the air displacement and either not work at all or have poor pumping performance.

I do.

The drain pipe and the vent pipe are 2 different pipes. Look at the photo.The drain pipe shoulda had a tee in it that the p-trap outlet woulda hit. The top of this tee would have been looped back to the vent pipe. 6" above the flood rim (in the wall), of course. This job was roughed in wrong and it went downhill from there.

You know I'm right. But I will argue. I have some time. The Bachelor doesn't come on for 33 minutes.

service guy · 03-01-2010, 09:07 PM

Watchout Matt, you are arguing with the guy who argued against the law of physics in the "psi" thread, that was a hoot.

Quote:

Originally Posted by the master

100 psi in a 12" pipe is not going to move 11,000 pounds of mass. You do realize thats over 5 tons dont you?

...if you filled a 12"x6" pipe up with water and capped one end and placed a ram in the other end and on top of the ram you placed 5.5 tons of mass......what would the pressure be in the pipe? YOUR saying it would be 100 psi. I dont think so.

**ILPlumber** · 03-01-2010, 09:12 PM

Quote:

Originally Posted by service guy

Watchout Matt, you are arguing with the guy who argued against the law of physics in the "psi" thread, that was a hoot.

i had forgotten that. We need a classic threads area.

house plumber · 03-01-2010, 09:16 PM

Quote:

Originally Posted by Matt

I do.

The drain pipe and the vent pipe are 2 different pipes. Look at the photo.The drain pipe shoulda had a tee in it that the p-trap outlet woulda hit. The top of this tee would have been looped back to the vent pipe. 6" above the flood rim (in the wall), of course. This job was roughed in wrong and it went downhill from there.

You know I'm right. But I will argue. I have some time. The Bachelor doesn't come on for 33 minutes.

I'll have to find the manufacture specs. We put these in alot. It was done according to their specs.

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03-01-2010, 07:47 PM	#14
TheMaster Registered Member Join Date: Jun 2009 Posts: 6,437 My Photos	looking at it again it seems you could have piped both fixtures into the vent portion and then used the original inlet to loop back above the highest fixtures rim and tye back into the vent making a loop and eliminating the s-trap and the mechanical vent.