Adding a macerator tank to an existing toilet might sound like an easy way to build a new bathroom "” especially in a basement, attic, or anywhere traditional plumbing is tricky. But can a regular toilet be used with a macerator tank?
Let's break it down.
1. Why This Question Comes Up
👉 You've already got a standard toilet installed. Instead of replacing it, you're wondering: Can I just hook up a macerator pump behind it and send waste uphill or through small pipes?
This is a common scenario for homeowners looking to add a bathroom in a space without standard drainage. Unfortunately, most "œregular toilets" aren't designed to work with macerator systems, and trying to force compatibility often leads to plumbing problems, poor performance, or code violations.
2. What Counts as a "Regular" Toilet?
When we say "regular toilet," we're usually referring to models that:
- Use a floor outlet, where waste exits vertically into a flange on the floor
- Operate with a gravity-fed flush system, relying on downward force
- Are designed for standard plumbing stacks, not pressurized pumps
These are the most common toilets in North America -- great for traditional setups, but generally incompatible with macerator tanks.
3. Why Regular Toilets Don't Work with Macerator Pumps
Here's why most standard toilets don't support retrofitting with a macerator tank:
- Outlet Direction: Macerators require a rear-discharge toilet that flushes horizontally into the pump. Regular toilets flush downward.
- Height Mismatch: The pump's inlet needs to align with the toilet outlet. A floor-outlet toilet won't match the pump's height.
- Plumbing Code: Many local codes prohibit non-standard modifications, especially for permanent installations.
- Flush Incompatibility: Gravity-fed toilets aren't built to handle the back pressure or directional change a pump may cause.
💡 Quick tip: Can you convert a regular toilet?
- Technically, yes (with enough plumbing skill). But it's rarely worth the time, cost, or risk.
4. Smarter Alternatives If Your Toilet Isn't Compatible
If your current toilet setup doesn't support a macerator, here are better options:
🛠 Recommended solutions:
- Replace your toilet with a rear-discharge model, then pair it with a standalone macerator pump.
- Buy an all-in-one upflush toilet system, where the pump and toilet are designed to work together from the start.
- Contact the toilet manufacturer to ask if they offer a compatible macerator tank or retrofit kit.
These routes save time, improve reliability, and reduce the chances of installation issues.
5. Before You Buy a Macerator Tank - Checklist
📋 Still determined to make it work? Double-check these points first:
✅ Is your toilet a rear-outlet type?
✅ Does the discharge diameter match the pump inlet?
✅ Is the toilet outlet height level with or above the pump's inlet?
✅ Is there enough space behind the wall for the macerator tank "” or can you use an extension pipe?
✅ Have you consulted the manufacturer to confirm compatibility?
✅ Do you understand local plumbing codes regarding macerator use?
Skipping any of these steps can turn a simple upgrade into a costly mistake.
Final Takeaway: Know Before You Retrofit
In most cases, you can't use a regular toilet with a macerator tank. The outlet orientation, flush method, and structural layout simply don't line up. Forcing compatibility leads to leaks, clogs, or noncompliance with plumbing codes.
Instead, explore smarter options like rear-outlet toilet + pump combos, complete macerator toilet systems, or manufacturer-recommended kits.
Upgrading your setup the right way saves time, money, and a lot of mess.
📌 FAQs
Q: Can I use a two-piece toilet with a macerator tank?
Only if it has a rear outlet and is on the compatibility list for the pump. Most floor-outlet models are not supported.
Q: Are macerators legal in all areas?
No "” check your local plumbing codes. Some areas allow them only for auxiliary bathrooms, not primary ones.
Q: What is the best type of toilet for a macerator system?
A rear-discharge toilet designed to work with a specific macerator pump or a complete upflush toilet kit.
Q: Is it safe to modify my existing toilet for macerator use?
Only if the toilet is confirmed to be compatible with the pump. Most aren’t — forced retrofits can cause leaks, poor drainage, and void warranties. Always check with the manufacturer.