Assemble the New PVC Drain Section — Connect Disposal to Waste Tee

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How to Plumb a Double Kitchen Sink Drain with a Garbage Disposal · Step 4 of 8

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In this video

The plumber measures and cuts new pieces of 3-inch and 1.5-inch PVC pipe using a reciprocating saw. He then dry-fits the main component, a 3' x 3' x 1.5' x 1.5' double sanitary tee, to determine the exact lengths needed. Once measured, he applies purple PVC primer to the ends of the pipes and the inside of the fittings, followed by PVC cement. He firmly pushes the pieces together, creating the new drain assembly, including the vertical sections and the horizontal arms for the two sinks.

Goal: Plumbing Pipes Installation

Always dry-fit your PVC assembly before gluing to ensure all your measurements are correct. Once glued, it's permanent.

Used in this video

Reciprocating Saw (Tool Type: Power Tools) — Cutting PVC pipes to the required lengths.
Tape Measure (Tool Type: Measuring Tools) — Measuring the lengths of PVC pipe needed for the assembly.

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FAQs

How difficult is it to plumb a double kitchen sink with a garbage disposal for a beginner, and how long should I expect it to take?

This project is rated as beginner-friendly, but requires patience and attention to detail. For a DIY novice, plan to set aside 3-5 hours, especially if you encounter unexpected issues or need to make precise cuts. The material cost, including the disposal and plumbing parts, typically ranges from $150-$400 depending on the quality and features chosen.

Are all the listed tools, especially specialized cutters and reamers, truly essential for this plumbing project?

While basic tools like Channellock pliers and a screwdriver are essential, specialized tools like the RIDGID PTEC 3000 plastic tubing cutter and the Husky Reamer are highly recommended. They ensure clean, burr-free cuts on plastic pipes, which significantly reduces the risk of leaks and makes assembly much easier. You could use a hacksaw for cuts, but meticulous deburring would then be critical.

What are the most common mistakes that lead to leaks after installing a double sink drain and garbage disposal, and how can I prevent them?

The most common causes of leaks are improperly tightened slip-nut connections, not using plumber's putty correctly around the sink flange, and misaligned P-trap components. Always hand-tighten slip nuts first, then use your Channellock pliers for an additional half-turn, ensuring all washers are seated perfectly. Thoroughly test for leaks by running water and inspecting every connection with paper towels.

What specific safety precautions should I take when working under the sink, especially with a garbage disposal and water lines?

Safety is paramount. Always disconnect power to the garbage disposal at the circuit breaker before beginning any work on it. Turn off the water supply to the sink at the shut-off valves or main house valve. Wear safety glasses to protect your eyes from debris, and use gloves to avoid contact with old grime or chemicals.

Transcript

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inch and a half hold it into place we're going to dry fit this in place until we can get that tea in there kind of like that just we know where our bearings are three by inch and a half sanitary tea double tea so we got to kind of mock this thing out for measurements but this is pretty much ready to go for the lab to remember we've got to continue another piece over behind this pipe and stub it out for the kitchen something kind of like that measure bottom of the hub to the front hose we're going to prime one end of this we're going to glue this to the bottom of that tea that's going downwards oh come on, come on, get in there, there we go, hold it into place you can see my stuff is pointing straight out, we've got a little bit of the pitch we're going to wind up, we're going to bring this bottom boot up

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