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The Oatey 39103 is a four-inch knock-out test cap made from ABS material. This product is essential for testing drainage systems in plumbing applications. It effectively seals pipes to prevent water flow during testing, ensuring plumbing systems are tight and effective.
This knock-out test cap is an ideal solution for plumbers to conduct reliable tests on drainage systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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