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FLEX Drain 4 in. Black Copolymer DMV Flexible Tee/Wye

  • Use as a wye or tee in DWV applications
  • Injection-molded copolymer construction with UV inhibitors
  • Connector has flexible construction to fit most angles
  • View More Details
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Return this item within 90 days of purchase. Read Return Policy

Product Details

The FLEX-Drain 4 in. Polypropylene DWV Flexible Tee/Wye is ideal for use as a wye or tee in DWV applications. This connector features flexible construction that can bend to fit most angles. FLEX-Drain helps you get the job done faster and easier, with professional grade durability and more versatility than traditional corrugated pipe. Flexible and expandable, FLEX-Drain easily bends around any obstacle, hold its shape during installation and with a simple snap, its integrated soil-tight fittings lock securely and stay connected during backfilling. FLEX-Drain is a complete drainage solution system that's widely compatible with virtually all traditional 3 in. and 4 in. corrugated pipe and 4 in. PVC. Technologically superior, it's made with no-break copolymers and exceeds all applicable ASTM crush standards.
  • Lightweight, durable polyethylene construction
  • Adapts to fit 3 in or 4 in corrugated pipe and 4 in PVC pipe (not included)
  • Flexes to become a wye or tee
  • For DWV applications
  • Maximum working pressure of 70 psi
  • Minimum working temperature of -50°F and a maximum working temperature of 150°F
  • Bends to fit most angles
  • Return Policy

Additional Resources

From the Manufacturer




Double Fitting Size4" x 4"Fitting 1 size4"
Fitting 2 size4"Fitting 3 size4"
Fitting Size Dimensions4" x 4" x 4"Product Length (in.)9.563 in
Single Fitting Size4"Triple Fitting Size4" x 4" x 4"


ApplicationNon-Potable WaterColor FamilyBlack
Color/FinishBlackCompatible Pipe MaterialBlack Pipe
Connection 1Press FitConnection 2Press Fit
Connection 3Press FitConnectivityPush Fit
FeaturesCorrosion Resistant, Corrugated, Flexible, Underground UseFitting or Connector TypeTee
Fitting/ Connector CollectionPolyethyleneMaterialPolypropylene
Maximum working pressure (psi)70Maximum Working Temperature (F)150
Pack Size1Pipe or Fitting Product TypePipe & Tubing
Product Weight (lb.).27 lbReducing FittingYes

Warranty / Certifications

Manufacturer WarrantyLimited Manufacturers Warranty - Free from defects in materials and workmanship

Questions & Answers

Q:Can this connect SDR35 pipes to corrugated pipes, too?
by|Mar 23, 2023
0 Answer
Answer This Question
Q:Does this require couplers to join to 4" drain pipe or is it sized to fit inside it?
by|Jul 8, 2022
1 Answer
Answer This Question

A:  Yes it does, they are right next to them in the aisle

by|Jul 14, 2022
    Q:How does this compare to Advanced Drainage Systems' HDPE Snap Wye Coupling that costs twice as much, in terms of durability?
    by|Apr 18, 2022
    0 Answer
    Answer This Question
    Q:Why are the 2 ends diff size? Is there a drop thru this? One is shorter than the other.
    by|Nov 28, 2020
    3 Answers
    Answer This Question

    A:  That's a question you need to ask the manufacturer

    by|Dec 18, 2022

    A:  The top connector is oblong, to fit the down spout. The other end is round to connect to 4" drainage pipe.

    by|Apr 9, 2023
      2 found this answer helpful

      A:  They are all the same size to fit inside the 4' pipe.

      by|Sep 29, 2021
      1 found this answer helpful
      Showing 1-4 of 12

      Customer Reviews

      4.3 out of 5
      • 4.3
        out of 161 reviews
      • 96% recommend this product
      Filter by:
      Showing 1-10 of 161 reviews
      Used the flex tee/wye to connect 2 French drain tubes together and feed the open end of the tee/wye thru a drilled hole in my retaining wall for drainage. Flexible enough to bend in a 45 degree angle at the walls’ joint. Worked well for my project.
      • Verified Purchase
          Had to trim off end to fit in pipe, too long.
            This solved a problem created by a gutter contractor trying to join a new gutter with an existing drain. He used a totally inappropriate piece of plastic ( something like: https://www.homedepot.com/p/Amerimax-Home-Products-Flex-A-Spout-55-in-Brown-Vinyl-Downspout-Extension-85019/100047958) and cut a hole into my 4" drain pipe to stick the one end in. This arrangement cut the flow rate of both drains so badly the gutters backed up. It took some effort to get this fitting on both pipes without the fitting coming out at 90 degrees from popping out. One we got it in there it has been working fine. We have had some big rain storms since and no gutter backup. We had to repair the place where he cut the 4" Pipe with heavy duty duct tape. HD would not me add a picture of this repair.
              It seems fine. I will not install it until next year. Then I will know more.
                  Didn’t lock with other pieces had to duct tape together
                    It was OK the "T" connector comes apart I had to drill some holes and use zip ties to make it stay together.
                      exactly what I needed
                        Showing 1-10 of 161 reviews

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