Symptoms
- Water drips specifically from the side nipple, not the hose
- Crack or split visible around the nipple base
- Leak happens mainly when the dishwasher drains
- Hose clamp is tight but leak continues
Likely causes
- CommonCracked plastic nipple from over-tightening the hose clampPlastic nipples can crack if the clamp is tightened too aggressively.
- PossibleAge-related brittleness of the nipple materialPlastic components can become brittle over years of heat cycling.
- PossibleImpact damage during installation or cleaningBumping the nipple while working under the sink can crack it.
What to do
- Turn off power to the disposal and dishwasher before inspecting closely.
- Remove the hose clamp and slide the dishwasher hose off the nipple to inspect it directly.
- Look for cracks, splits, or a nipple that feels brittle or moves independently of the housing.
- If the nipple is part of a separate knockout fitting, check whether a replacement fitting is available for your model.
- If the nipple is integral to the disposal housing and damaged, the disposal itself will need to be replaced.
- When reattaching a hose to any nipple, snug the clamp firmly but avoid overtightening.
Tools and parts
- Screwdriver
- Flashlight
Garbage disposal dishwasher inlet fittingSearch: “garbage disposal dishwasher nipple replacement”
When to call a pro
If the cracked nipple is molded into the disposal body itself, a plumber can confirm whether replacement of the whole unit is needed.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.