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sald · Nov 23, 2012, 06:55 AM

Why does the lid of my basement pump up sewer blow air out gromet for wires and lid bolts when the toilet is flushed. Toilet is located along side crock.crock has 2 in. studor vent located higher than discharge connection to main waste line. This does not happen sink or shower is used. Only when toilet is flushed. Thanks

massplumber2008 · Nov 23, 2012, 07:03 AM

Hi Sald

The simple answer is because studor vents are NOT allowed on sewage ejector systems!

If you read any sewage ejector pump manual one of the first things they present is that these ONE WAY studor vents are not allowed because these systems need to take air in and expel air out... NOT something you want to happen in your basement, huh?

This is a "health hazard" and needs to be corrected ASAP by running a dediated 2" vent up and through the roof, or some plumbing inspectors will allow you to connect this "dedicated vent" into the existing vent system just before the main plumbing vent goes through the roof.

More questions.. Let me know, OK?

Mark

sald · Nov 23, 2012, 09:06 AM

Originally Posted by massplumber2008

Hi Sald

The simple answer is because studor vents are NOT allowed on sewage ejector systems!

If you read any sewage ejector pump manual one of the first things they present is that these ONE WAY studor vents are not allowed because these systems need to take air in and expel air out....NOT something you want to happen in your basement, huh?

This is a "health hazard" and needs to be corrected ASAP by running a dediated 2" vent up and through the roof, or some plumbing inspectors will allow you to connect this "dedicated vent" into the existing vent system just before the main plumbing vent goes through the roof.

More questions...? Let me know, OK?

Mark

Thanks for the quick response. Truoble is there is 2 floors before the attic and an open floorplan above the basement on first floor. No walls line up on second floor with first floor. I guess that's why it has a studor vent. Is it just the tank that needs to tie in. the toilet does not have a vent it goes directly into tank.

massplumber2008 · Nov 23, 2012, 11:20 AM

The toilet may be WET VENTED by the sink vent... maybe? If not, you would still not connect the plumbing (toilet) vent into the ejector pit vent... need to remain separated as I presented in my first post (note exception in 1st post).

In terms of routing a vent, look to see if you can run a 2" vent up through some closets... maybe one or two line up one above the other so little patching work needs to be done. If you find some closets that line up AND keep the vents toward the front left or front right of the closet people will barely ever see them!

Worst case, you could also run the vent to the outside of the house as long as it is 10 feet from any window, door, vent, etc... This would definitely be better than NO VENT!

sald · Nov 23, 2012, 01:46 PM

Originally Posted by massplumber2008

The toilet may be WET VENTED by the sink vent....maybe? If not, you would still not connect the plumbing (toilet) vent into the ejector pit vent...need to remain separated as I presented in my first post (note exception in 1st post).

In terms of routing a vent, look to see if you can run a 2" vent up through some closets....maybe one or two line up one above the other so little patching work needs to be done. If you find some closets that line up AND keep the vents toward the front left or front right of the closet people will barely ever see them!

Worst case, you could also run the vent to the outside of the house as long as it is 10 feet from any window, door, vent, etc... This would definitely be better than NO VENT!

. Thanks again. Ng on the wet vent for sink. It has a studor vent on it as well. Is it only the tank vent that I must get outdide? Do I need to add a vent fot the toilet. If so I will be bresking up tile and slab. Ouch!

massplumber2008 · Nov 23, 2012, 01:59 PM

No, I'm going to figure that the toilet is wet vented by the sink vent (the studor vent), so probably OK there. Just install a new 2" vent for the pit and you should be all set here!

Good luck!

sald · Dec 1, 2012, 08:59 AM

Is there a max length for the 2" vent line from the pit? There will be a horizontal run of 15' in basement ceiling then a verticle run through 1st ahd 2nd floor of 20 feet, then horizontal in attic about 15' before piercing roof. Thanks AGAIN!

ma0641 · Dec 1, 2012, 09:07 AM

Originally Posted by sald

is there a max length for the 2" vent line from the pit? there will be a horizontal run of 15' in basement ceiling then a verticle run through 1st ahd 2nd floor of 20 feet, then horizontal in attic about 15' before piercing roof. thanks AGAIN!

A vent must pitch back to the main line. It cannot be truly horizontal. Why do you need a 15 ft. run in the attic?

speedball1 · Dec 1, 2012, 09:29 AM

is there a max length for the 2" vent line from the pit? There will be a horizontal run of 15' in basement ceiling then a verticle run through 1st ahd 2nd floor of 20 feet, then horizontal in attic about 15' before piercing roof.

There's no max length for the vent. However. As Brian pointed out you MUST give that vent line the same slope back to the fixture that it's venting that you would give to a drain line. 1/4" to the foot. Good luck, Tom

sald · Dec 1, 2012, 09:33 AM

Originally Posted by ma0641

A vent must pitch back to the main line. It cannot be truly horizontal. Why do you need a 15 ft. run in the attic?

Hoping I could tie in to the main vent before it goes through the roof. Some people say yes, others say no. so I went with the exyra length in case I can. If not it will reqiure about 10 feet to add roof vent on back stde of house roof. Thanks

speedball1 · Dec 1, 2012, 10:03 AM

hoping I could tie in to the main vent before it goes through the roof.

This is called reventing and is acceptable in all codes. However, there's a downside. If that line ever has to be snaked the plumber must haul his equipment up in the attic and cut the vent line. This adds quite a bit to the labor costs and is a real hassle for the plumber. Good luck, btom

sald · Dec 1, 2012, 10:36 AM

Originally Posted by speedball1

This is called reventing and is acceptable in all codes. However, there's a downside. If that line ever has to be snaked the plumber must haul his equipment up in the attic and cut the vent line. This adds quite a bit to the labor costs and is a real hassle for the plumber. Good luck, btom

I am in east fishkill New York state. Do you know if its acceptable here?

speedball1 · Dec 1, 2012, 12:15 PM

I am in east fishkill New York state. Do you know if its acceptable here?

I can only repeat my last post

This is called reventing and is acceptable in all codes.

Is there something special about Fishkill that would cause them to outlaw revents? Have I missed something here that would cause you to question my post? Back to you, Tom

mygirlsdad77 · Dec 1, 2012, 01:42 PM

Tom, the vent in question is for a sewer ejector pit. Some areas allow reventing and some don't when it comes to ejectors.