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How to install vent under sink

Oatey vent
Oatey sure vent 6 DFU
Approved to vent pipes up to 2"

Buy sure-vent air admittance valve:
1 piece vent and tubular adapter
1 piece vent and tubular adapter
Oatey sure vent 20 DFU
Oatey sure vent 20 DFU
Approved to vent pipes up to 3"

Buy sure-vent air admittance valve:
Admittance valve 20 DFU vent

Oatey sure vents are 100% closed if they fail... so never sewer gas odor

sure vent wall box
Sure vent wall box
So vent can draw air

Buy louvered access box:
Oatey sure vent wall box
Oatey access panels
tubular drain pipes
Buy Extra tubular parts
Tubular drain pipe
Flexible coupling
1-1/2 to 1-1/4 connector
Chrome flexible drain pipe

T plus 2 with applicator brush
Guarantee no leak
Buy
Rectorseal at Amazon 
Connect to tubular sink drain
Approved up to 2" drain pipe
Resource:
Oatey 6 DFU spec sheet
Glue to 1-1/2" or 2" PVC
Approved up to 3" drain pipe
Resource:
Oatey sure vent installation
Louvered access required for inside-the-wall sure vent

Sure vent requires open access to air; to draw air, and for visual inspection, and for replacement
Hard-to-find tubular parts for sink drains T plus 2 guarantees no leaking under sink
(read instructions below)

Does not dry out in can.
1/4 pint: handy size for DIYers

Do you need a vent?

Each sink, shower and bathtub must have a trap filled with water to stop sewer gas from entering home, and each trap must have a vent

Symptoms of no vent or inadequate vent:
Gurgling sound when water is draining in home
Sewer gas odor inside room


Vent stack not visible above drain (look inside attic/ and on roof)
Sinks directly in front of window often do not have vent
No vent stacks visible on roof (or in attic)

Slow drain
Drain constantly clogging
S-trap going through floor instead of P-trap going through wall

Home must have at least one 3-4" main vent stack

vent stack
Vent stack on roof. Must meet code for distance above roofing material. 6" minimum.
To use sure-vent and meet code, the home MUST have at least 1 main stack vent to roof
Oatey sure vent

Oatey sure vent / 20 DFU

Add vent to S-trap

Approved to drain pipes up to 3" diameter
Solvent weld to 1-1/2 or 2' PVC pipe

Buy sure-vent:
Oatey 20 DFU vent
Air admittance valves
Add vent to S-trap
Larger image

... Add sure-vent to S-trap

S-Trap goes through floor
Vent must be in vertical position

Buy:
P-traps and trap adapter
S-traps
Quick vent or sure-vent at Amazon
1-1/2 tubular drain pipe

PVC slip joint Tees at Amazon
PVC slip joint elbow
T plus 2 thread sealant at Amazon


Trap is full of water to stop odor from entering home
Each trap requires a vent.
Without proper vent, the trap water can siphon out and let in sewer gas
Add a plumbing vent Trap adapter
Larger image
How to solvent weld Sure-vent to PVC pipe
Use primer to clean all PVC surfaces that will be connected.
Primer has applicator. Protect floors and belongings from primer drips
Let primer dry a few minutes.
Glue 1 joint at a time. Glue has applicator.
Apply generous amount of glue over entire surface of pipe.
Immediately push the pipe into place. Push pieces together fully, and quickly.
A moment later you will not be able to move the pipe.
Glue next connection etc. Let dry for a few hours
trap adapter
Female Trap adapter
purpose: Connect tubular drain pipe to PVC.
Buy:
Female trap adapters
PVC cleanrer primer
Buy:
PVC cleaner
PVC cement
Buy solvent weld:
PVC cement at Amazon
Resource:
Selection chart for solvent weld
Oatey sure vent Oatey vent

Oatey sure vent 6 DFU

All in one vent for under sink
Approved to drain pipes up to 2"

Buy sure-vent air admittance valve:
1 piece vent and tubular adapter
1 piece vent and tubular adapter
add a vent
Larger image

... Add sure-vent to P-trap

P-trap goes through wall
Oatey meets code requirement: Minimum 4" space between horizontal pipe and vent
Oatey 3925 rated 6 DFU/ Oatey 6 DFU vent specification sheet
Vent must be located at least 2 pipe diameters away from trap weir
Buy:
Oatey sure vent with tubular adapter
Sure vent with tubular adapter
Sure vents at Amazon

Buy other parts:
P-traps and trap adapter
S-traps
Quick vent or sure-vent at Amazon
1-1/2 tubular drain pipe

PVC slip joint Tees at Amazon
PVC slip joint elbow
T plus 2 thread sealant at Amazon

'Trap weir' is the final bend in trap as water exits trap Read more

Installing vent

Take photo of pipes before starting

For ease and less strain, place cushion on floor in front of sink
Wear kneepads
Have another person available to hand items to you
Post photos on facebook for cherished memories

Black vent inside wall / 1 DUF

Black vent is adequate for 1 bathroom sink
Black vents are 1-1/2" pipe thread
Fail frequently
Not code
New black vent at my home lasted 1 month
After failure, black vent sticks open
Failed black vent lets sewer gas into home

Resource:
How to make perfect drywall repair
New S Trap
Always start by taking apart the trap
Buy 1-1/2" tubular drain parts at local hardware or home center.

1-1/2" is standard code size for kitchen drain, disposal, sink basket etc.

Buy online:

Quick vent or sure-vent at Amazon
Solvent weld adapter between Vent and tubular drain pipe
P-traps and trap adapter
S-traps
Quick vent or sure-vent at Amazon
1-1/2 tubular drain pipe

PVC slip joint Tees at Amazon
PVC slip joint elbow
T plus 2 thread sealant at Amazon

S-trap

Take apart S-Trap (or P-Trap)

Unscrew 3 nuts, and bottom side of S-trap drops loose, and other side of S-trap lifts up
Put bucket under sink to catch water.
Notice that 1 nut is captive on the S-trap and cannot be removed
This side of S-trap has beveled surface
Notice that captive nut screws down and pushes beveled surface onto 2nd side of S-trap

Notice that all other nuts have a plastic washer ... except captive nut.

All washers and beveled surfaces must be cleaned
This is so each piece fits tight when reassembled

Remove nuts and washers for cleaning

Do not move outlet tee or tailpieces at top

If outlet tee or tailpieces are moved around...
... Then they must be taken apart , cleaned, and put back.

Buy:
Outlet and tee replacement with 2 tailpieces nuts and washers
Tailpiece washer
Dishwasher tailpiece

End outlet assembly with nuts and washers
Clean parts: Nuts, washers, tubular pipes

Remove all washers and nuts
Clean outside of tubular pipe where nut and washer seat
Clean plastic washer/ do not reuse damaged or broken washer
Rubber washer must be replaced with new washer
Clean threads so nut threads onto pipe smoothly
Clean beveled surface where beveled washer seats inside pipe
Inspect/ wash out tubular pipes to remove obstructions

Tube should fit inside other tube at least 1"

Less than 1" can work, but fittings might come loose easier
Measure carefully, and buy extra parts if cut is too short

cut pipe with hack saw

How to cut tubular pipe: Plastic or metal

Tubular pipe has a thin wall, unlike water pipe and galvanized pipe that has a thick wall.
So cutting tubular pipe is different.

To make cutting it easy, and straight:
Mark all the way around pipe using marker, or scratch-mark with hacksaw
Cut through pipe at one place using hack saw
Then rotate pipe forward, and cut some more
Rotating forward is better.
Keep rotating pipe as cuts are made
Keep saw blade at angle so it is not cutting perpendicular against pipe

Tip for tubular drain:

Flat side of washer always faces the nut

sink drain

Coat washers with T plus 2

Dry fit parts
Position washer in place
Use applicator and apply generous coat that covers entire washer
Protect clothes and belongings from T plus 2... it is messy and difficult to clean off surfaces
If you have rubber washer, old one must be replaced with new washer
T plus 2 will seal the joint 100% on plastic or rubber
Do not use silicone.... joint will never come apart and silicone might mold
Buy online:
T plus 2 thread sealant at Amazon
s trap

 Tighten nuts loosely

Wait until all drain parts are together before nuts are fully tightened

sink vent

Connect center nut

Tighten all nuts firmly

Then go back and tighten all nuts a bit more


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