Parts and Tools to Have on the Counter
Buy the pieces before you open the cabinet. A half-finished install with no water in the kitchen is no fun on a Sunday evening.
- A disposal rated 1/3, 1/2 or 3/4 horsepower, with a mounting kit included.
- Plumber's putty or the gasket that comes in the box.
- A new discharge elbow and a rubber gasket, usually supplied with the unit.
- A power cord kit for a plug-in setup, or a cable clamp and wire nuts for hardwired.
- A new 1-1/2 inch tailpiece and trap adapter if the old ones are cracked.
- Slip-joint pliers, a screwdriver, a hammer and a short length of wood for the knockout.
- A bucket, rags and a flashlight.
Check the brand's instructions for the exact mounting style. Most modern units use a three-bolt ring that locks onto the sink flange with a half-turn.
Plug-In or Hardwired: Choosing the Electrical Setup
Your cabinet and your comfort with wiring decide this more than the disposal itself.
Plug-in cord
- Needs a grounded outlet inside the sink cabinet, usually switched from the wall.
- Easier to remove for service because you just unplug it.
- Check that the cord rating matches the unit and that the outlet is not under a leaky pipe.
Hardwired
- Connects to a cable through the cabinet wall with a clamp and wire nuts.
- Cleaner look and no outlet to get wet.
- Best left to a licensed plumber or electrician unless you already know how to work with live circuits.
Permits and Inspections in Crowley
Crowley Community Development, at 201 E. Main Street, takes permit and inspection questions Monday through Thursday from 7:30 a.m. to 5:30 p.m. and Friday from 7:30 a.m. to 11:30 a.m. The city also takes applications through its MyGov portal.
The city pages do not say whether a simple disposal swap needs a permit, and permit rules vary by the scope of the job. If you are only replacing a disposal in the same spot, ask the Crowley building department before you buy. If you plan to add a new drain line or move electrical, plan on a permit and an inspection.
Source: City of Crowley Community Development page
Installing the Unit, in Order
Work with the power off and the kitchen free of people. Here is the sequence a plumber follows.
Cut power and clear the cabinet.
Turn off the breaker for the disposal circuit and confirm with a tester. Unplug or disconnect the old unit, support it with one hand, and twist it off its mounting ring. Disconnect the drain trap and dishwasher hose, and keep a bucket under the trap.
Set the flange.
Remove the old mounting assembly from the sink opening, clean the old putty off, and press a rope of fresh putty under the new flange lip. Seat it from above and tighten the mounting ring from below until putty squeezes out evenly. Wipe the extra putty away.
Open the dishwasher knockout.
If a dishwasher drains into the unit, a plastic plug blocks the inlet. Set a screwdriver on the plug and tap it with a hammer until it drops inside, then fish it out. Forgetting this step causes the dishwasher to back up.
Hang the disposal and connect the drain.
Lift the unit onto the mounting ring, line up the tabs and rotate it until it locks. Attach the discharge elbow with its gasket, then connect the elbow to the trap with slip joints. The trap should slope toward the wall drain, not away from it.
Wire and test.
Connect the cord or cable, secure the cover plate and restore power. Run cold water, flip the switch and watch every joint with a flashlight and a dry paper towel for drips.
Matching Horsepower to the Household
More power grinds finer and jams less, but it also costs more and takes more cabinet space.
| Size | Good fit | Trade-off |
|---|---|---|
| 1/3 horsepower. | One or two people, light use. | Jams more often on fibrous scraps. |
| 1/2 horsepower. | Most family kitchens. | Common size and easy to find replacements. |
| 3/4 horsepower and up. | Heavy cooking, large households. | Needs more cabinet room and a firm mount. |
| Batch feed. | Homes with kids or tight sink space. | Runs only with the stopper locked in place. |
Always check the cabinet clearance and the dishwasher hose reach before choosing a size.
Where New Installs Go Wrong
Most callbacks trace to a small set of mistakes.
Missed knockout
The dishwasher drains into a blocked inlet and water sits in the tub after every cycle.
Crooked mount
If the three-bolt ring is not tightened evenly, the gasket leaks at the flange and drips down the cabinet.
Wrong trap slope
A trap that tilts the wrong way holds standing water that can smell and slow the drain.
Short dishwasher hose loop
The dishwasher hose should rise as high as the cabinet allows before dropping to the disposal. A low hose lets gray water flow back into the dishwasher.
When to Stop and Call a Plumber
Stop if the supply or drain connections look corroded, if the old flange will not release or if there is water under the cabinet. A soft cabinet floor is a sign that the leak has run for a while. Do not wire a disposal if the circuit is shared with other loads or you are unsure of the breaker label.
Keep your hands out of the disposal at all times. If it hums but will not spin, switch the power off and use the hex socket on the bottom to turn it by hand. That is a fix for a jam, not a reason to reach in. For a unit that has failed, see our garbage disposal repair page for the options.
A disposal install touches the drain and the electrical supply, so it is governed by the plumbing code and the electrical code. According to the manufacturer instructions, a plug-in or hardwired connection must match the unit.
What a Licensed Plumber Brings to the Job
A licensed plumber checks the drain slope, replaces tired tailpieces and traps, and confirms the dishwasher air gap or high loop is correct. We also test the circuit and make sure the switch is where you can reach it. You get a clear price before work starts, and many installs can fit a same-day appointment when available.
If you also want a new sink faucet or an extra fixture while the cabinet is open, our plumbing installation team can handle both together. We serve Crowley as well as Burleson and Forest Hill, and you can call (817) 601-6266 to talk through the scope.
Garbage Disposal Install Questions
The city pages we reviewed do not say, and permit rules vary by the job. Ask the Crowley building department at 817-297-2201, ext. 3000, before you buy. They can tell you if a same-spot swap qualifies.
A plug-in unit in a sink that already has a flange and a good outlet is a manageable project. Hardwiring, new drains or a corroded sink are better left to a licensed plumber.
It is a thin plastic plug inside the disposal's dishwasher inlet. You tap it out with a hammer and screwdriver, then remove it. If you leave it, your dishwasher cannot drain.
A simple swap often takes one to two hours. A new install with cabinet changes or wiring takes longer. We will give you an idea after seeing the cabinet.
A 1/2 horsepower unit suits most Crowley family kitchens. Go up to 3/4 horsepower if you cook heavily, and check the cabinet space first.
The City of Crowley report lists total hardness of 6 to 9 grains per gallon. Scale can build up in drains and traps over time, so a regular flush with hot water helps, and a worn unit may show mineral crust at the seams.