Install a New Unit That Drains Cleanly

Garbage disposal installation service in Marble Falls for new units and replacements.

If you are replacing a failed disposal or adding one to a sink that never had a unit before, the installation needs to line up correctly with your drain assembly and provide a secure electrical connection that will not trip the breaker. Homes in Marble Falls sometimes have older drain configurations that require an adapter flange or a slightly longer tailpiece to fit the new unit without forcing the connection. You may also need a dishwasher inlet knockout removed if your dishwasher drains through the disposal, and that step has to happen before the unit is mounted or you will have to take it back down.


Marble Falls Plumbing LLC installs new garbage disposals by removing your old unit, mounting the new disposal securely to the sink flange, connecting the discharge pipe to your drain line, and wiring the unit to a switched outlet or hardwired circuit depending on how your kitchen is set up. We test the unit under running water to make sure it drains without leaking and operates quietly. Once the installation is complete, food waste goes down the drain cleanly and your sink stays clear during meal prep.


If you need a new disposal installed in Marble Falls, reach out to schedule a convenient appointment and we will handle the full setup.

Open kitchen cabinet with a dark gray garbage disposal unit.
Man installing a garbage disposal under a kitchen sink.

How We Install Your Disposal Correctly

We begin by turning off power at the breaker and disconnecting the old disposal if one is present, then remove the mounting assembly and clean the sink flange opening. In Marble Falls, we check the drain line for clogs before installing the new unit because a blocked pipe will cause immediate backup issues even if the disposal works fine. We mount the new unit using the included flange and snap ring, attach the discharge elbow, and connect the electrical wiring to match your existing setup.


After installation, you will notice the disposal runs quietly when you turn it on, water drains immediately without pooling, and there are no leaks under the sink even when the faucet is running at full flow. The unit sits firmly in place without wobbling, and the reset button stays flush against the bottom of the housing.


We do not install disposals in sinks with septic systems unless the tank is rated to handle the added organic load, and we also avoid installing units without a proper electrical ground because that creates a shock hazard. If your drain line is too narrow or corroded, we recommend addressing that before mounting a new disposal so the system drains correctly from the start.

Under-sink plumbing with a garbage disposal, drain pipes, and water filter system.

Questions People Ask Before We Install

Homeowners in Marble Falls usually want to know what size disposal they need, whether their plumbing can handle it, and how long the job will take. These are the most common questions we answer during the scheduling process.


  • What size garbage disposal should you install? Most households do well with a half-horsepower or three-quarter-horsepower unit depending on how much cooking you do and how many people live in the home. Larger families or homes that process a lot of vegetable scraps benefit from the extra grinding power.
  • How long does a garbage disposal installation take? A straightforward replacement in Marble Falls usually takes between one and two hours including removal of the old unit, mounting the new disposal, and testing the drain and electrical connections. First-time installations may take slightly longer if we need to modify the drain assembly.
  • What happens if the sink flange does not fit the new disposal? We either install a universal mounting bracket or replace the sink flange to match the disposal model you selected. Most modern disposals use a standard three-bolt mount, but older sinks may require an adapter ring to create a proper seal.
  • Why does the disposal need its own electrical circuit? Disposals draw a significant amount of current when the motor starts, and sharing a circuit with other appliances can cause breaker trips. We verify that your unit is wired to a dedicated outlet or a hardwired switch that can handle the load safely.
  • When should you avoid installing a garbage disposal? If your home uses a septic system that is not rated for food waste or if your drain line is severely corroded and prone to clogs, adding a disposal can create more problems than it solves. We inspect your setup and let you know if any changes are needed before installation.


If you need a new garbage disposal installed or want to replace a unit that no longer works, Marble Falls Plumbing LLC handles the full process including removal, mounting, drain connection, and electrical wiring. We bring the tools and fittings needed to complete the job in one visit. Contact us to schedule your installation in Marble Falls and start using a disposal that drains cleanly and operates quietly.