Disposal runs but water backs up into the sink; grinding seems normal but water drains very slowly or not at all.

Safety First: Turn OFF the disposal and switch OFF power at the breaker before disassembling any plumbing.

• Step 1 – Run water and test: With the unit OFF, run cold water. If water stands in the sink, the blockage is downstream of the grinding chamber.
• Step 2 – Inspect splash guard: Remove the Astracast rubber splash guard (if removable). Clean off grease and food buildup that may be restricting flow.
• Step 3 – Remove discharge elbow: Place a bucket under the disposal outlet. Loosen the slip nut on the Astracast discharge elbow and remove the elbow. Clear any compacted food or debris using a bottle brush.
• Step 4 – Check P-trap and waste pipe: Remove the P-trap and inspect for clogs. Clean thoroughly and reassemble, ensuring all gaskets are seated correctly.
• Step 5 – Flush system: Restore power, run cold water, and briefly operate the disposal to flush remaining debris. Check for leaks at all joints.

Warning: Do not use chemical drain cleaners in an Astracast disposal; they can damage seals and metal components and pose a burn hazard during disassembly.