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Test for Leaks and Functionality — Test the Connection for Leaks

Beginner6 hours

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How to Connect a PVC Drain to a Cast Iron Pipe · Step 9 of 9

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Slowly turn the water supply back on at the shut-off valves. Check the supply line connections for any leaks. Run water into the sink and let it drain. While the water is running, thoroughly inspect the new drain assembly, tailpiece, and P-trap connections for any signs of dripping. Test the pop-up stopper to ensure it operates correctly, holding water when closed and draining when open.

Goal: Plumbing Pipes Repair (Leaking)

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Roger Wakefield Plumbing Education

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FAQs

What are the most important safety precautions when cutting cast iron pipe?

When cutting cast iron, always wear 3M Professional Chemical Splash/Impact Safety Goggles, MCR Safety BearKat Safety Glasses, and a 3M P100 Household Respirator to protect against dust and debris. Cast iron is heavy, so ensure the pipe is well-supported with 2 in. x 4 in. dimensional lumber before and during cutting to prevent injury or damage.

Do I need a special blade for cutting cast iron with a reciprocating saw?

Yes, a standard reciprocating saw blade will not work effectively on cast iron. You will need a Milwaukee 12 Amp SAWZALL Reciprocating Saw equipped with a DIABLO 9 in. Diamond Grit Reciprocating Saw Blade for Cast Iron Cutting. This specialized blade is designed to cut through the hard material efficiently and safely.

How do I properly support the cast iron pipe to prevent it from falling after I cut it?

Before making your cut, use 2 in. x 4 in. dimensional lumber to create temporary supports on both sides of the cut line. Secure these supports to a stable surface, ensuring they can bear the pipe's weight and prevent any movement, cracking, or collapse during the cutting process.

Why is a shielded flexible coupling recommended for connecting PVC to cast iron, and how do I install it correctly?

A shielded flexible coupling creates a durable, leak-free seal between cast iron and PVC, accommodating slight differences in pipe diameter and vibration. Ensure both pipe ends are clean and deburred before installing the coupling, then tighten the stainless steel bands evenly to the manufacturer's specified torque using a TEKTON 7/16 in. Nut Driver.

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All right, all done and cleaned up. Look at that, how nice and fresh it up it looked with a new stopper in there and everything of that. No, down, up, down, up. The new ones are magnetic. They don't have a little hook situation set up in them so you can just grab it and pull it right out if you ever need to clean it. It's got a little mag in there where you're looking at there that catches a little metal pin down inside and makes everything work just handy. There you go, down, up, down, up. All right, now this didn't turn out to be a great video because honestly I couldn't get to where I was working at actually show you really well what I was doing. So what I'm going to have to is just kind of explain it and feel bad about that. It was just turning one of those projects that didn't really work out well and sometimes it happens. And then you put it all back together and you're all done and you've got a nice clean sink to it. Look at that, works just like new. The water goes down and you even have a stopper that works again. Let me get that and integrate.

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