What is this "tank"?

[Michael Thomas]

"Tank" at right of picture:

1) What is it?

2) How do I inspect it?

3) Where do I learn more about it?

[Tim Connors]

This is an above floor ejector pit (no hole neccessary) for sewage. You will also see this application used for basement wet bars, washers and etc. Can also be used when basement toliets are built on a platform.

[Michael Larson]

This is an above floor ejector pit (no hole neccessary) for sewage. You will also see this application used for basement wet bars, washers and etc. Can also be used when basement toliets are built on a platform.You're right Tim.

I didn't expand the pic before posting. oops. I deleted my post.:o

[Michael Thomas]

Thanks,

I've never seen one before (other than the "Quick John" type where the front section of the tank is a raised support for the toilet) as usually a drain line below the basement floor is entering a sump.

[Jerry McCarthy]

For those in the Golden State; CPC 2007 - 710. We don't inspect, but disclaim. When they go bad it is not a pleasent sight! I also advise all to inform their clients not to use any plumbings fixtures connected to a sewage ejector system, especially a WC, should the electrical power be off. :eek:

[Jerry Peck]

West Coast Jerry,

:D Have you read what is under that drawing?

"The discharge for the pump should be 2 in. dia. min. Pipes >2 in. for discharge could prematurely wear out the pump due to increased head pressure."

I'm not quite sure on this, but ...

Isn't "2 in. dia. min." and " >2 in. " the same thing? :cool:

[David Banks]

I have also seen them not vented properly.

[Billy Stephens]

West Coast Jerry,

:D Have you read what is under that drawing?

"The discharge for the pump should be 2 in. dia. min. Pipes >2 in. for discharge could prematurely wear out the pump due to increased head pressure."

I'm not quite sure on this, but ...

Isn't "2 in. dia. min." and " >2 in. " the same thing? :cool:


Mr. Peck,

I read it as "2 in. dia. min. and a warning if 2 in. was used as the minimum install that it

could prematurely wear out the pump due to increased head pressure. :)

[Jerry Peck]

I read it as "2 in. dia. min. and a warning if 2 in. was used as the minimum install that it

could prematurely wear out the pump due to increased head pressure. :)

Billy,

Except that it says ">"2 inches, i.e., "greater than" 2 inches - not "2 inches".

I believe the symbol should have been "<" for "less than" 2 inches.

[Jerry McCarthy]

CPC 2007
Sewage Ejector Systems:
710.3.1Shall have a minimum discharge capacity of twenty (20) gallons per minute.
710.3.2In single dwelling units, the ejector or pump shall be capable of passing a one and one-half (1-1/2) inch diameter solid ball, and the discharge piping of each ejector or pump shall have a back water valve and gate valve, and be a minimum of two (2) inches in diameter.
710.3.3In other than single-dwelling units, the ejector or pump shall be capable of passing a Two (2) inch diameter solid ball, and the discharge piping of each ejector or pump shall Have a backwater valve and gate valve, and be a minimum of three (3) inches in diameter.
710.3.3.1[HCD1&HCD2]The minimum size of any pump or any discharge pipe from a sump having a water closet connected there to shall be not less than (2) inches Any pump or any discharge pipe from a sump having a water closet connected there to shall be not less than (2) inches..
710.4The discharge line from such ejector, pump, or other mechanical device shall be provided with an accessible back water or swing check valve and gate or ball valve. If the gravity drainage line to which the discharge line connects is horizontal, the method of connection shall be from the top through a wye branch fitting. The gate or ball valve shall be located on the discharge side of the back water or check valve, gate or ball valves, when installed in drainage piping, shall be full-way type with working parts of corrosion-resistant metal. Sizes four (4) inches or more in diameter shall have cast-iron bodies, and sizes less than four (4) inches, cast-iron or brass bodies

[Jim Luttrall]

OK Jerry P., Read it out loud and see if you get what I did.
Paraphrase: You must use a minimum 2" discharge pipe but If you use a pipe bigger than 2" it may wear out quicker. So just use the 2" pipe instead of a 3 or 4 or 5"...
JMHO

[Brandon Chew]

"The discharge for the pump should be 2 in. dia. min. Pipes >2 in. for discharge could prematurely wear out the pump due to increased head pressure."



I believe the symbol should have been "<" for "less than" 2 inches.

I agree. The diagram has a misprint.

The first part, which agrees with the code cite that Jerry M provided, says the pipe needs to be a minimum of 2 inches in diameter. The second part reads "Pipes greater than 2 inches for discharge..." but should read "Pipes less than 2 inches for discharge...." For any given flow rate, the head pressure is going to be higher on a smaller diameter discharge pipe than it will be on a larger one.