Combo tee vs. tee wye

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Hello ,
I'm trying to get to the bottom of what appears to be an elusive subject on code compliance and industry jargon.
Specifically, I want to know what Nibco cast DWV Tee-Wye fitting(s) (if any) will satisfy the code requirements wherever a "Tee-Wye fitting with an eight-bend, or combo fitting or other satisfactory fitting(s) ...." is called for.(for example : Nibco Long Turn Tee-Wye
PN # 812- {2"}
PN # E145150
PN # 039923504487 ) ?

There is much debate about whether a 'long sweep tee-wye' is the same rad as a 'tee-wye with an eighth-bend fitting or when a "combo" is used.
There even seems to be some disagreement about whether .79 rad meets the same criteria and code compliance as rad 1.05.
Does a Nibco long sweep Tee-Wye fulfill the code compliance for the equivalent under the Tee-Wye plus eight bend fitting or combo or similar ..." ?
If so what is the advantage or reason to use a 'Tee-Wye with an additional eight-bend fitting when the...

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24 Answers

Originally Posted by

David M

Hi All,

The drains of my two storey home drain to one point at my basement ceiling, and then vertically to the basement floor via a 3" DWV pipe to a 4" sanitary tee that horizontally provides 1) a clean-out and 2) drain to the septic out the foundation wall. The center-line of the 4" sanitary is 9" off the floor.

I wish to add a basement toilet and sink within 3 feet of the drain, and tap into the drain. I've found a wall-mount rear-drain toilet with a 3" drain whose center-line can be 10" to 14" above the floor. (Geberit pressure assist toilet with in wall tank and carrier). So, I reckon I should be safe with the toilets drain slope to the main drain line mentioned above; eighth inch of slope per horizontal foot. However, this would require replacement of the drain's sanitary tee with a double connection.

To make this work, I'll need to replace the existing 4" sanitary tee with a horizontally mounted...

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Schedule 40 PVC-DWV fitting. Required in some plumbing code areas to connect a branch line into a vertical drain pipe (stack) instead of conventional tee fitting. Also, used to connect a horizontal branch pipe approaching a horizontal drain pipe on the perpendicular. Hub x hub x hub. No. 72521: Type: Reducing Combination T & Y, Size: 2" X 2" X 1-1/2", Schedule: Schedule 40 DWV, Material: PVC, Pkg Qty: 1 No. 72531: Type: Reducing Combination T & Y, Size: 3" X 3" X 1-1/2", Schedule: Schedule 40 DWV, Material: PVC, Pkg Qty: 1 No. 72532: Type: Reducing Combination T & Y, Size: 3" X 3" X 2", Schedule: Schedule 40 DWV, Material: PVC, Pkg Qty: 1 No. 72542: Type: Reducing Combination T & Y, Size: 4" X 4" X 2", Schedule: Schedule 40 DWV, Material: PVC, Pkg Qty: 1 No. 72543: Type: Reducing Combination T & Y, Size: 4" X 4" X 3", Schedule: Schedule 40 DWV, Material: PVC, Pkg Qty:...

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Change

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A complete part number list from AMP-### to WIR-###

Use CTRL-F to search through this list.
This list is provided as a reference, be sure to verify by name/description before ordering any parts; part numbers do change from time to time.

MOTOR AMPLIFIER:
AMP-0001 = (USE AMP-0002)
AMP-0002 = (USE AMP-0016)
AMP-0003 = (USE ELE-0074)
AMP-0005 = AMPLIFIER CHASSIS/3 CARDS, GTK; VMC15 DC
AMP-0006 = AMPLIFIER CARD, SMA7377-1; GTK VMC15 DC
AMP-0007 = (USE AMP-0022)
AMP-0010 = (USE AMP-0030)
AMP-0011 = AMPLIFIER CARD, GTK; SHO
AMP-0012 = AMPLIFIER CHASSIS/3 CARDS, AMC; VMC15 DC
AMP-0013 = AMP, SERVO-COOLANT; AMC
AMP-0014 = AMPLIFIER CARD, AMC; VMC15 DC
AMP-0015 = AMPLIFIER CARD, AMC; HP DC
AMP-0016 = CAPACITOR, 13000 MFD, 200W VDC
AMP-0018 = (USE AMP-0022)
AMP-0019 = (USE AMP-0022)
AMP-0021 = AMPLIFIER CARD, 4568-1 HPCE; GTK DC
AMP-0022 =...

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