Szeto Handyman
What a replacement includes
- Tenants can open up
- A code for the dishwasher visit
- Shut off the water and power to the old unit.
- Disconnect supply, drain and power, and slide the old unit out.
- Check the supply valve, replacing it if it is stiff or leaking.
- Connect a new braided supply line with the right elbow to the new unit.
- Connect the drain hose with a high loop or air gap, and to the disposal or sink tailpiece.
- Connect power to the existing cord or junction box.
- Slide the unit in, level it, and secure it to the counter or cabinet sides.
- Run a cycle and check for leaks.
- Faucets, toilets and valves
- Traps and drain connections
- Water heaters on existing lines
- Disposals and supply lines
- Moving or adding pipe runs
- Sewer and main drain work
- Repiping and new gas lines
- Slab leaks
Drain connection details
A dishwasher drain must loop up high under the counter or pass through an air gap at the sink so dirty sink water cannot flow back into the dishwasher. If the drain connects to a disposal, the knockout plug inside the disposal inlet must be removed. We check both on every install.
- Hot-water shutoff (angle stop)
- Cold-water shutoff (angle stop)
- Supply lines to the faucet
- P-trap, which holds a water seal
- Drain line into the wall
Measuring before you buy
Most built-in dishwashers fit a standard opening, but check the height under the counter, especially if new flooring raised the floor. Some units need adjustable legs set very low. Also check if the old unit uses a hardwired junction box or a plug, and if the new one ships with a power cord.
- Wide shotThe whole fixture and the space around it.
- Close-upLabels, model numbers, the leak or break.
- ConnectionsValves, pipes, wires or brackets.
- Send itText the photos with your cross street.
Signs your dishwasher is failing
- Water left in the bottom after a cycle.
- Leaks at the door or under the unit.
- Dishes not getting clean despite clean filters.
- Error codes that keep returning.
- Rust inside the tub.
Some issues are fixable parts like a door gasket or filter. Internal pump or control failures often mean it is time to replace.
What is outside our scope
A new dishwasher where there was none, or one that needs a new outlet or circuit, is outside our scope. We can handle the swap once connections exist.
The first cycle after installation
Most dishwashers connect to the hot water line under the kitchen sink, so running the tap until it is hot before starting a cycle helps the first fill begin warm. For the first run, use an empty cycle and look under the front edge and inside the sink cabinet for drips at the supply and drain connections.
- Free price by text
- No surprises on the dishwasher
Check again after a full load, because the drain hose only fills during pump-out. Keeping the cabinet floor clear and dry makes any new drip easy to spot.
Securing and leveling
A dishwasher that is not secured tips forward when the loaded rack is pulled out. Most units fasten to the underside of the counter with brackets, or to the cabinet sides when the counter is stone.
We level the unit side to side and front to back so the door closes squarely and water drains toward the sump. A unit that is out of level can leak at the door or leave water in the tub.
Power connection
Many dishwashers are hardwired through a junction box at the front corner of the unit. Others plug into an outlet under the sink. Some new models ship without a cord or a junction box kit, so check before the install day.
We connect to the existing power supply in the same way as the old unit. If the old unit was wired with an extension cord, a damaged cord or no strain relief, we stop and leave the power off until the supply is fixed properly.
- Dishwasher
- High loop fastened under the counter
- Disposal inlet or drain tee
- Trap
- Hose through the cabinet side
- Drain outlet on the dishwasher
Water supply details
Most units connect to the hot water stop under the sink with a braided line and a 90-degree elbow on the dishwasher valve. Thread sealant goes on the elbow threads, not on compression fittings. We route the line so it does not kink when the unit slides back, and so it clears the drain hose and power cable.
Getting the most from a new unit
- Run the kitchen tap until hot before starting a cycle.
- Clean the filter regularly; many new units have a removable filter.
- Scrape plates instead of rinsing; many detergents work with some food left on.
- Use a rinse aid in hard water areas to reduce spotting.
What to send
Photos of the old unit, the space under the sink, the power connection and the new unit's model number.
Older kitchens and dishwasher space
In older kitchens, a dishwasher may have been fitted into a space that is slightly narrower or shorter than today's standard. Measure the opening at the front and the back, because cabinet sides are not always parallel. Tile or wood flooring added after the dishwasher went in can trap the old unit under the counter; in that case the legs are lowered all the way or, rarely, the counter needs shims.
- Dishwasher parts named up front
- Bring your own
We take care not to scratch the floor when sliding units out and in. Check the side panels of your new unit for mounting tabs and the location of the water inlet, which differs between brands and affects how the supply line is routed under the tub. If the old unit fed from a distant valve, such as one in the next cabinet, we check that path is still sound.
More questions
Do I need a new drain hose? New units include one. We connect it with a new clamp and check its routing.
Can you install a panel-ready unit? Yes, if the cabinet panel is supplied. We mount it to the door per the maker's template.
Water and energy
Running full loads and using the maker's eco cycle saves water and energy compared with frequent half loads. Skipping a hand pre-rinse also saves water at the sink.
- Shut it offTurn the valve under the fixture clockwise, or the main valve.
- Relieve pressureOpen a faucet nearby so the line drains.
- Contain itTowels and a bucket; unplug anything wet.
- Photo and textSnap the leak and valve, then text us.
Related guide: How to decide whether to repair or replace a faucet.
Photo checklist
- The current dishwasher and the opening around it
- Under the sink: the supply valve, drain connection and disposal
- The new dishwasher’s model number
- The outlet or wiring box under the sink
Questions we get
Do you haul away the old dishwasher?
Tell us when you ask for the quote.
Can you install a dishwasher I bought online?
Yes, if it fits the opening and existing connections.
Does the new one need a new valve?
If the existing stop is old or stiff, we recommend replacing it.
- Text (310) 628-9399
- Phone about the dishwasher in open hours
Why is there water in the bottom of my dishwasher?
Often a clogged filter or drain hose. Clean the filter first.
Can you reuse my old supply line?
We replace it. Old lines are a common leak source and a new braided line is inexpensive.
Why does the drain hose need a high loop?
It keeps dirty sink water from flowing back into the dishwasher.
- English
- Mandarin Chinese
- Cantonese
Will a new dishwasher fit my opening?
Most standard models do. We check height, width and depth first.
Do I need a new outlet?
If there is no existing outlet or circuit, that is outside what we do.
Why does my dishwasher leak at the front?
Often a worn door gasket or the unit not being level.
- Valley-wide
- Dishwasher jobs in houses and ADUs
Can a dishwasher go next to the oven?
Yes, as long as there is a cabinet panel or the maker’s required gap between them. The installation guide lists the clearances.
What comes in a dishwasher installation kit?
Usually a braided supply line, a 90-degree elbow and sometimes a power cord. Check what the model includes before buying extras.
- A wider view
- The dishwasher up close
- Nearest cross street
Get a quote for dishwasher replacement
Text a photo and your cross street. Free estimates, and most texts are answered within the hour.
Good to fix along with the dishwasher
Common add-ons: fixing a jammed disposal, ice maker, fridge and washer water lines, clogged sinks, drains and P-traps. Symptom pointing elsewhere? Try under-sink water filters or under-cabinet lighting.
Repairs related to the dishwasher
Booked across the 626, in West Covina, Covina, Baldwin Park, Azusa, Temple City, Sierra Madre, Monrovia, Duarte, Irwindale and Glendora.