Mansfield M210 Plumb Pak PP835-88 Water Saver Flush Valve Review

Tired of constantly repairing or replacing inefficient flush valves in your commercial restroom? You’re not alone. Facility managers and building owners often struggle with high water bills, frequent maintenance calls, and outdated plumbing components. The Mansfield M210 Plumb Pak PP835-88 Water Saver Flush Valve offers a smart, long-term solution—combining water efficiency, reliability, and compliance with modern plumbing standards. In this guide, we’ll break down everything you need to know about this trusted flush valve, so you can make an informed decision for your property.

What Is the Mansfield M210 Plumb Pak PP835-88 Water Saver Flush Valve?

The Mansfield M210 Plumb Pak PP835-88 Water Saver Flush Valve is a high-performance, commercial-grade flushometer designed for urinals and toilets in high-traffic environments like office buildings, schools, airports, and restaurants. It’s part of Mansfield’s Plumb Pak line—a trusted brand in commercial plumbing for over 60 years.

This specific model (PP835-88) is engineered to deliver 1.0 gallon per flush (GPF) for urinals and 1.28 GPF for toilets, well below the U.S. EPA’s WaterSense standard of 1.6 GPF. That means significant water savings without sacrificing performance.

💡 Did You Know?
According to the U.S. Environmental Protection Agency (EPA) , commercial buildings can reduce indoor water use by up to 30% simply by upgrading to WaterSense-labeled fixtures like the Mansfield M210.

Why Choose the Mansfield M210 Over Other Flush Valves?

Many facility managers ask: “What makes the M210 stand out?” Here’s a quick comparison:

Key Advantages:

• Water Savings: Reduces water consumption by up to 40% compared to older models.
• Durability: Brass construction resists corrosion and withstands heavy use.
• Easy Maintenance: Modular design allows quick diaphragm or control stop replacement—no need to shut off main water supply.
• Code Compliance: Meets ASME, IAPMO, and local plumbing codes across all 50 states.

How Does the Mansfield M210 Water Saver Valve Work?

Unlike traditional flush valves that rely on gravity or simple mechanical triggers, the M210 uses a balanced pressure diaphragm system. Here’s how it works in 4 steps:

1. User Activation: Pressing the handle opens the control stop.
2. Pressure Equalization: Water flows into the upper chamber, equalizing pressure on both sides of the diaphragm.
3. Flush Initiation: Once pressure equalizes, the diaphragm lifts, allowing a full, powerful flush.
4. Automatic Shut-Off: After the preset volume (1.0 or 1.28 gallons), the chamber refills, pressure re-balances, and the diaphragm seals shut.

This design ensures consistent flush volume regardless of water pressure fluctuations—a common issue in older buildings.

Installation & Maintenance Guide (Step-by-Step)

Installing or replacing the Mansfield M210 is straightforward for licensed plumbers. Here’s a simplified guide:

Tools Needed:

• Adjustable wrench
• Screwdriver
• Teflon tape
• Replacement diaphragm kit (Mansfield part # PP835-88-KIT)

Steps:

1. Turn off water supply to the fixture.
2. Relieve pressure by flushing the valve until empty.
3. Unscrew the cap (usually 4–6 set screws) using a screwdriver.
4. Remove old diaphragm and control stop.
5. Inspect the valve body for debris or corrosion; clean if needed.
6. Install new diaphragm and control stop from the PP835-88-KIT.
7. Reassemble the cap, tightening screws evenly in a crisscross pattern.
8. Turn water back on and test flush 2–3 times.

✅ Pro Tip: Replace the diaphragm every 2–3 years in high-traffic areas to prevent leaks and maintain efficiency.

Common Problems & Troubleshooting

Even reliable valves like the M210 can develop issues. Here are the top 3 problems and fixes:

If problems persist after basic troubleshooting, consult a licensed plumber—especially if your building uses non-standard water pressure systems.

Mansfield M210 vs. Sloan Royal vs. Zurn AquaFlush

How does the M210 stack up against other leading commercial flush valves?

While Sloan and Zurn offer premium features, the Mansfield M210 delivers 90% of the performance at a lower cost, making it ideal for schools, municipal buildings, and small businesses.

FAQ Section

Q1: Is the Mansfield M210 PP835-88 Water Saver Flush Valve WaterSense certified?

A: Yes. It meets EPA WaterSense criteria for high-efficiency fixtures, using ≤1.28 GPF for toilets and ≤1.0 GPF for urinals.

Q2: Can I install this valve myself?

A: While DIY installation is possible for experienced users, we recommend a licensed plumber—especially in commercial settings where code compliance is critical.

Q3: What’s the difference between PP835-88 and PP835-87?

A: The PP835-88 is designed for water-saving applications (1.0–1.28 GPF), while the PP835-87 is a standard 1.6 GPF model. Always verify your local plumbing code before purchasing.

Q4: How long does the diaphragm last?

A: In average-use settings (50–100 flushes/day), the diaphragm lasts 2–4 years. In high-traffic restrooms (300+ flushes/day), replace every 12–18 months.

Q5: Is this valve compatible with older Mansfield fixtures?

A: Yes. The M210 series is backward-compatible with most Mansfield commercial toilets and urinals installed since the 1990s.

Q6: Where can I buy genuine replacement parts?

A: Purchase directly from Mansfield Plumbing Products, authorized distributors like Ferguson or SupplyHouse.com, or verified sellers on Amazon (look for “Ships from/Sold by Mansfield”).

Conclusion

The Mansfield M210 Plumb Pak PP835-88 Water Saver Flush Valve is a smart investment for any commercial property looking to cut water costs, reduce maintenance headaches, and meet sustainability goals. With its durable brass construction, precise water control, and easy servicing, it outperforms many competitors at a fraction of the price.

If you manage a building with aging plumbing, upgrading to the M210 isn’t just practical—it’s financially savvy. Over 10 years, a single valve can save over 50,000 gallons of water and hundreds in utility bills.

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Have questions about installation or compatibility? Drop a comment below—we’re happy to help.