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Internet #205616001

Model #THD1020

Store SKU #1001091718

Store SO SKU #1001092480

1-1/4 to 1-1/2 in. ABS In-Line Sump Pump Check Valve

$16.48
  • Compatible with any 1.25 in or 1.5 in. sump pump
  • Exceptionally durable flapper ensures long-lasting performance
  • Rugged ABS construction with stainless steel clamps
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Product Details

For sump pump applications the THD1020 can be used with any 1.25 in. or 1.5 in. sump pump. The THD1020 features 1.25 in. or 1.5 in. combination rubber adapters and the industry's most durable check valve flapper. This is the world's most reliable sump pump check valve.
  • Can be used with any 1.25 in. or 1.5 in. discharge sump pump
  • 1.25 in. or 1.5 in. combination adapters
  • Fits 1.25 in. or 1.5 in. black, galvanized and DWV Sch. 40 pipe
  • Industries most durable flapper
  • All stainless steel clamps
  • Strong, durable ABS body
  • Millions in service
  • Compatible with any 1.25 in. or 1.5 in. discharge sump pump
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

55Questions
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Q:Can I install the check valve horizontally?
by|Jan 27, 2023
3 Answers
Answer This Question

A:  I would not. The valve moves with gravity and water pressure. Placing horizontally will open the valve. When the water pressure pushes on the valve with enough pressure it will likely close but less pressure may allow the valve to stay open.

by|Jan 30, 2023

    A:  No. This has been answered multiple times.

    by|Feb 3, 2023

      A:  Hello Joseph. We recommend that this check valve be installed in the vertical position.

      by|Jan 27, 2023
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        Q:Will this work as a replacement for this?
        by|Jan 1, 2023
        1 Answer
        Answer This Question

        A:  Hi Shane. We are not sure how to answer your question. Please resubmit it with more detail. Thank you.

        by|Jan 1, 2023
          caret
          Q:I?m going to buy a maintenance free battery doe it have the acid already in it?
          by|Dec 15, 2022
          1 Answer
          Answer This Question

          A:  Hello Dennis. You have asked the question of the wrong supplier.

          by|Dec 16, 2022
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            Q:Can this be installed after a ball valve in a vertical position for the purpose of draining a slop sink with a pump?
            by|Nov 5, 2022
            1 Answer
            Answer This Question

            A:  Hi RayP. This check valve is designed to be installed in the vertical position and will work in your application.

            by|Nov 5, 2022
              Showing 1-4 of 55
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              Customer Reviews

              4.6 out of 5
              (855)
              • 4.6
                out of 855 reviews
              • 92%recommend this product
              Filter by:
              Showing 1-10 of 855 reviews
              It fit snug around 1.5" PVC pipe. Needed to adjust...
              It fit snug around 1.5" PVC pipe. Needed to adjust the clamps a bit for 1.25" pipe. Adjust ALL 4 Clamps, don't rely on the placement as is. After sliding and tightening the clamps into position, there are no leaks or back flow. I'm confident this check valve will extend the life of my new sump pump!
              by
              Response from JackelJun 29, 2020
              Hello NWAtlanta. Thank you for the 5 Star Review and kind words. You are absolutely correct; one should adjust / tighten all four clamps prior to use. Thanks for the tip! Jackel
              • Verified Purchase
              1 found this review helpful
              Easy to install, works like a charm. Highly recommended.
              Easy to install, works like a charm. Highly recommended.
              by
              Response from JackelMay 16, 2020
              Hi Edgar. Thanks for the 5 Star Review and kind words! We really appreciate it. Jackel
              • Verified Purchase
              • Recommended
              1 found this review helpful
              this check valve has always worked perfectly for me as I have an active sump pump. I replace the ...
              this check valve has always worked perfectly for me as I have an active sump pump. I replace the valve only when I need to repair or replace the pump as a preventative measure. Easy to install.
              by
              Response from JackelApr 19, 2019
              Hi Husky. Thank you so much for this review. This is the highest complement this product can receive: it works. We appreciate your return business and confidence in our product! Jackel
              • Verified Purchase
              • Recommended
              5 found this review helpful
              it works!
              Easy to install as long as you tighten all 4 rings ;)
              by
              Response from JackelSep 26, 2018
              Hi Johnny. Thanks for the review. We really appreciate your business. Jackel
                • Recommended
                2 found this review helpful
                Easy to install. Works great! With some good measuring, and this easy to clamp on attachment, I...
                Easy to install. Works great! With some good measuring, and this easy to clamp on attachment, I was able to swap out pump that had been working very hard for 6 weeks for a new one, in under 4 minutes, avoiding a wet basement!
                by
                Response from JackelAug 22, 2018
                Hi Drainagesolver. Thanks for the great review! We really appreciate your kind words and your business. Jackel
                • Verified Purchase
                • Recommended
                2 found this review helpful
                Very good quality check valve. Knowing that a certain percentage of DIYers tend not read the inst...
                Very good quality check valve. Knowing that a certain percentage of DIYers tend not read the instructions, I thought I would point something out: You generally see this check valve pictured in a vertical position but that is not how it should be installed. Instead, this valve needs to be installed in the horizontal position. Also, make sure to observe the fluid flow arrow. The instructions are quite clear.
                by
                Response from JackelMar 27, 2018
                Hi WiseShopper. Thanks for the review. We appreciate your business. Jackel
                • Verified Purchase
                • Recommended
                9 found this review helpful
                Working
                Working
                by
                Response from JackelFeb 21, 2018
                Hi Jack. Thanks for the review. We really appreciate your business Jackel
                • Verified Purchase
                • Recommended
                2 found this review helpful
                I installed it on a sump pump 1 1/4" discharge pvc pipe for a backyard drain, and it worked just ...
                I installed it on a sump pump 1 1/4" discharge pvc pipe for a backyard drain, and it worked just fine.
                by
                • Verified Purchase
                • Recommended
                1 found this review helpful
                I don't have drains in my basement floor (old house) so I need a pump for my laundry discharge. M...
                I don't have drains in my basement floor (old house) so I need a pump for my laundry discharge. My old check-valve started leaking--this one replaced it perfectly and does the job.
                by
                • Verified Purchase
                • Recommended
                2 found this review helpful
                Good Check Valve
                We have installed this check valve when an additional pump was installed in order to avoid back up into the drain pipe connected the main sump pump. It works great!
                by
                • DIY
                • Verified Purchase
                • Recommended
                2 found this review helpful
                Showing 1-10 of 855 reviews

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