This repair guide will help you fix your garbage disposal.
Need a Replacement Garbage Disposal?
InSinkErator Badger 5 Garbage Disposal, Standard Series 1/2 HP Continuous Feed Food Waste Disposer, Black, Set of 1
Price: $114.00
Common Symptoms & Causes
If you’re noticing any of the following symptoms, you might have a Universal Xpress Mount leak on your Moen Host Series GXS75C garbage disposal.
🔨 Pro Tip from Dave
On the GXS75C, I’ve seen a common error where technicians only replace the upper sink flange gasket while ignoring the three-bolt mount assembly cushion ring beneath it. This cushion ring, part of the Moen Xpress Mount Kit, hardens and distorts over time, which is often the real source of the leak. Make sure to inspect and reseat all three mounting tabs evenly. An uneven mount leads to persistent dripping, even with a new gasket installed.
- Water pooling directly beneath the sink flange where the disposal mounts
- Visible dripping from the top ring of the GXS75C unit during or after running water
- Dampness or water stains forming on the cabinet floor under the sink
- Loose or shifting disposal unit that rocks when touched at the mounting assembly
Typically, this issue arises from a worn or deteriorated sink flange gasket, a failed plumber’s putty seal, or a cracked Universal Xpress Mount ring that has loosened over time.
How Much Does This Repair Cost?
| Repair route | Typical cost |
|---|---|
| Do it yourself | $10–$40 (parts) |
| Professional repair | $150–$300 (parts and labor) |
If you’re planning to replace the Universal Xpress Mount on your Moen Host Series GXS75C yourself, expect parts to run you about $10–$40. A professional plumber or appliance technician, on the other hand, will likely charge between $150–$300 for a service call that includes labor and parts. By tackling this repair yourself, you could save over $100 and restore your disposal to full working order.
Frequently Asked Questions
How do I know if my Moen Host Series GXS75C has a Universal Xpress Mount leak?
Check for water pooling beneath the mounting area or moisture around the base of the unit. A loose or deteriorated Xpress Mount seal is usually at fault.
Can I fix the Universal Xpress Mount leak myself without a plumber?
Absolutely! Most homeowners can handle this repair with basic tools. Just follow the steps in this guide, and you’ll have the mount reseated or replaced properly.
What replacement parts do I need for this repair?
You’ll likely need a compatible Xpress Mount gasket or seal kit designed specifically for the Moen GXS75C. Checking Moen’s official parts catalog will ensure you have the correct part number.
Recommended Products
Here are the parts and tools I recommend for this repair, based on compatibility and customer reviews:
- Waste King EZ Mount Garbage Disposal Sink Flange Kit
- 8Pcs/Set Garbage Disposal Mount Sink Flange Kit and Stopper for Waste King, Garbage Disposal Drain Assembly Kit, Rubber Flange and Drain Lock Nut for Waste King, Whirlaway Parts (114mm) Model : 1030
- Garbage Disposal Drain Elbow Replacement for Moen Garbage Disposal Drain And Gasket Kit, with 1.5″ Elbow, Flange, Gasket, and Two Screws
The Sink Flange Kit That Stops the Universal Xpress Mount Leak
If you’ve got water pooling under your sink on a GXS75C, there’s a good chance the sink flange gasket has compressed or the mount assembly itself has shifted. This kit is the first one to try to replace both without the hassle of tearing down the entire disposal.
What works
- The flange gasket is thicker than the OEM version on older GXS75C units, providing better compression longevity before you find yourself back under the sink.
- Snap ring seats consistently into the mount groove, preventing the slipping that leads to those annoying slow drips while you’re loading the dishwasher upstairs.
- Installation takes about 20 minutes if you’ve already disconnected the disposal—there’s no need to pull the entire unit and start from scratch.
What doesn’t
- This kit is designed for Waste King-compatible mounts, so double-check that your GXS75C flange diameter matches the 114mm spec—some early production models had slightly different measurements.
- If your leak is actually coming from a cracked sink flange itself (it’s rare, but I’ve seen it), this kit won’t do the trick—you’ll need to replace the sink rim.
There was a time I ordered an aftermarket flange, thinking the gasket was the only issue, only to discover the snap ring was cracked, causing the entire assembly to rock. That wasted a trip and a day’s service call. Make sure to inspect both components under the sink before you order, then grab Waste King EZ Mount Garbage Disposal Sink Flange Kit to ensure you have everything you need on hand.
About This Article
Written by Dave Holt. I have been taking apart and fixing household appliances since I was a teenager who couldn't leave a broken one alone. Eighteen years later, after fixing things for neighbors, friends, and anyone who'd let me, I have seen almost every failure mode there is — and misdiagnosed my share along the way. I am self-taught, with no formal training or certifications. When I write a repair guide here, it is based on the actual job, not a manufacturer overview. More about this site.
Scope and limits. Dave is a self-taught repairer, not a certified appliance technician. Unplug before you open anything, and leave sealed refrigeration systems, gas connections, and hardwired circuits to a qualified technician.
