The Golden Rule
If it's not human waste or regular toilet paper, don't flush it.
A macerating toilet has a blade that grinds waste into a pumpable slurry. While this blade is effective at processing human waste and standard toilet paper, it is NOT a garbage disposal. Items that don't break down easily can wrap around the blade, jam the motor, or cause blockages in the small-diameter discharge pipe.
✅ Safe to Flush
| Item | Notes |
|---|---|
| Human waste | Obviously — this is what it's designed for |
| Regular toilet paper (1-ply or 2-ply) | Standard toilet paper breaks down quickly and is processed easily |
| Water | Hot water flushes help maintain the system |
❌ Never Flush
| Item | Why It's Dangerous |
|---|---|
| Wet wipes (even "flushable" ones) | Do NOT break down like toilet paper. They wrap around the blade and cause jams. This is the #1 cause of macerator clogs. |
| Sanitary pads | Far too thick for the blade; will jam instantly |
| Tampons | Can wrap around the blade shaft |
| Paper towels | Much stronger than toilet paper; don't break down |
| Facial tissues (Kleenex) | Stronger than toilet paper; can accumulate and cause blockages |
| Dental floss | Wraps around the blade and motor shaft |
| Hair | Wraps around the blade; accumulates over time |
| Cotton balls / cotton swabs | Cotton doesn't break down; clogs the pump |
| Band-aids / adhesive strips | Adhesive sticks to blade and internal components |
| Condoms | Can wrap around blade or block discharge pipe |
| Cat litter | Clumping litter is designed to absorb water and solidify — disastrous for a macerator |
| Food waste | Grease coats the blade; solids can jam it |
| Cooking oil / grease | Solidifies in the discharge pipe; coats internal components |
| Medications / pills | Chemical contamination; some don't dissolve |
| Excessive toilet paper | Normal amounts are fine; massive quantities can overwhelm the blade |
The "Flushable Wipes" Myth
We cannot stress this enough: "flushable" wipes are NOT safe for macerating toilets.
The "flushable" label on wet wipes means they will physically pass through a standard toilet's 3-4 inch drain pipe. A macerating toilet's blade and small-diameter discharge pipe (3/4" – 1") are a completely different situation. Wipes don't break down, they wrap around the blade, and they accumulate in the discharge pipe.
If you want to use wipes, put a small waste bin next to the toilet. Your macerator will thank you.
What About Toilet Paper Amount?
Standard toilet paper in normal amounts is completely fine. The blade handles it easily. The issues start when:
- Someone uses an entire roll's worth in a single flush
- Multiple flushes in quick succession with lots of paper (the macerator needs a moment between activations)
- Thick, quilted, or luxury toilet paper (3-ply and above) in large quantities
Tip: If you have guests who aren't familiar with macerating toilets, a small, polite sign in the bathroom can prevent problems. Something simple like "Please flush only toilet paper — no wipes or sanitary products."
If You've Already Flushed Something You Shouldn't Have
Don't panic. Read our guide on how to unclog a macerating toilet for safe methods to clear a blockage without causing further damage.
Protect Your Investment
Following these simple flushing rules will prevent the vast majority of macerating toilet clogs and extend the life of your unit significantly.
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