Watts FP-WP100 Flowmatic Winterizing By Pass Plate Review

This is What Happened When I Used the Watts FP-WP100 Flowmatic Winterizing By Pass Plate

When the mercury plummets and winter’s icy grip threatens the integrity of essential plumbing, the thought of draining every water line can be a dreaded chore. For years, my workshop has dealt with this annually, and the usual method involved a rather messy and time-consuming process of using antifreeze. This year, however, I was on the hunt for a more efficient, cleaner solution. That’s when I stumbled upon the Watts FP-WP100 Flowmatic Winterizing By Pass Plate, a seemingly simple yet ingenious device from Watts designed to simplify winterization. This stainless steel plate promised to eliminate the need for gallons of potable water antifreeze, a prospect that immediately piqued my interest given the sheer volume of housing units I service.

The annual ritual of winterizing often felt like a compromise between effectiveness and environmental responsibility, not to mention the sheer physical labor. Draining tanks, blowing out lines, and then introducing potentially taste-altering antifreeze into systems that would soon be used for drinking water was always a point of contention. I’d previously looked at a few bypass kits, but most seemed overly complex or prohibitively expensive for the simple task at hand. This particular model, however, caught my eye with its minimalist design and straightforward promise. Initial impressions upon holding the unit were that it felt robust; the stainless steel construction felt solid and well-made, giving me immediate confidence in its longevity. My only previous encounter with similar winterizing aids was a cheap plastic adapter that warped after a single season, so this metallic build was a welcome change. The immediate thought upon unboxing was one of practicality and efficiency, a welcome relief from the usual winter prep anxieties.


Real-World Testing: Putting Watts FP-WP100 Flowmatic Winterizing By Pass Plate to the Test

First Use Experience

My first deployment of the Watts Flowmatic Winterizing By-Pass Plate occurred at a small cabin frequently used throughout the year but susceptible to hard freezes when unoccupied. The existing setup was a standard 10-inch whole-house filter housing. The process was remarkably straightforward: unscrew the filter housing lid, drop in the plate and its accompanying gasket, and then screw the lid back on tightly. It genuinely took less than a minute.

No tools were required beyond what was already integrated into the housing, which was a significant departure from the fiddling with wrenches and hoses I was accustomed to. The plate sat perfectly within the housing, creating a secure seal without any fuss. Performance in this initial application was immediate; by bypassing the filter housing entirely, I could now directly connect my air compressor or antifreeze pump to the inlet and outlet lines without them filling the empty filter housing. This meant less waste and a much quicker turnaround for winterizing the cabin.

Extended Use & Reliability

Over the past few months, I’ve utilized this bypass plate on a variety of 10-inch and even a few 5-inch housings across multiple job sites. Its consistency has been impressive. I intentionally left one installed in a semi-permanent setup at my workshop’s auxiliary water station for about two months, exposed to varying workshop humidity and temperature fluctuations. There were no signs of corrosion, no stiffness in the seal, and no degradation of performance.

The durability of the stainless steel is evident; it doesn’t seem susceptible to the minor impacts or abrasions that often plague plastic components in a workshop environment. Cleaning is as simple as rinsing it off with water, and if it ever did get truly grimy, a quick scrub with a mild abrasive would likely restore it to near-new condition. Compared to the disposable antifreeze jugs and the labor involved, this stainless plate is proving to be an exceptional long-term investment. It doesn’t require replacement parts or special solvents, just a little occasional rinse.

Breaking Down the Features of Watts FP-WP100 Flowmatic Winterizing By Pass Plate

Specifications

The Watts FP-WP100 Flowmatic Winterizing By Pass Plate is engineered with a primary goal: to create a watertight seal within standard filter housings, effectively bypassing the filter element itself. Its core specification is its compatibility with all standard 10-inch and 5-inch filter housings. This broad compatibility is a significant advantage, meaning it can be used across a wide range of plumbing setups.

The plate itself has a 3-5/8 inch diameter, allowing it to fit snugly inside the larger diameter of typical filter housings. Constructed from economical stainless steel, the material is chosen for its inherent resistance to corrosion and its ability to withstand pressure and temperature variations common in water systems. This material choice directly translates to its promised longevity, suggesting it won’t need replacement anytime soon. The package also includes a gasket, essential for creating the tight seal necessary to prevent leaks.

Performance & Functionality

The primary function of this bypass plate is elegantly simple: to plug the void left by removing the filter cartridge, thereby allowing water or antifreeze to flow directly from the inlet to the outlet of the housing. In practice, it performs this task flawlessly. The seal created is robust, preventing any leakage even under the moderate pressures encountered during winterizing procedures.

Its main strength lies in its efficiency in winterizing. By eliminating the need to fill the filter housing with antifreeze, it significantly reduces the amount of winterizing fluid required, which translates to cost savings and less environmental impact. Furthermore, it drastically simplifies the process, making it faster and less labor-intensive. Its biggest drawback, if one can call it that, is its singular purpose; it’s not a multi-functional tool, but for its intended application, it’s exceptionally effective.

Design & Ergonomics

The design of the Watts Flowmatic Winterizing By-Pass Plate is a testament to functional simplicity. It’s a flat, circular plate made of what feels like a substantial gauge of stainless steel. There are no complex mechanisms or moving parts, which is a key factor in its reliability.

The inclusion of a well-fitting gasket is crucial for its ergonomic performance; it ensures a good grip and a tight seal without requiring excessive force. Installation and removal are designed to be as user-friendly as possible. The no tools needed aspect is a significant ergonomic win, as it means the user can complete the entire bypass swap in mere moments, even with cold or gloved hands. The smooth finish of the stainless steel also means it won’t snag on anything or create burrs during handling.

Durability & Maintenance

The economical stainless plate construction is the hallmark of this unit’s durability. Stainless steel is inherently resistant to rust and corrosion, which are common enemies of plumbing components. In my testing, even after repeated exposure to water and varying workshop conditions, there has been no indication of wear or tear.

Maintenance is virtually non-existent beyond a simple rinse with water to remove any debris. Given its solid construction, it’s highly unlikely to break or crack. The gasket, while a separate component, appears to be made of a durable rubber or silicone material that should also withstand regular use without significant degradation. Potential failure points are minimal, likely limited to the long-term integrity of the gasket, but even that seems robust.

Accessories and Customization Options

The Watts FP-WP100 Flowmatic Winterizing By Pass Plate comes with its essential accessory: a pre-fitted gasket. This gasket is crucial for ensuring a leak-proof seal and is designed to work in conjunction with the stainless plate.

Beyond this, there are no other accessories included, nor are there specific customization options for the plate itself. Its design is purpose-built and standardized. However, its compatibility with standard filter housing sizes means it integrates seamlessly into existing plumbing systems without requiring any modification to the housing itself. The true “customization” comes in its application – how it allows you to customize your winterizing process by bypassing the filter housing.

Pros and Cons of Watts FP-WP100 Flowmatic Winterizing By Pass Plate

Pros

  • Eliminates antifreeze use in filter housings: This is the primary benefit, saving money and simplifying the process.
  • Fits all standard 10-inch & 5-inch housings: Broad compatibility makes it a versatile tool for various setups.
  • Economical stainless plate lasts forever: The stainless steel construction ensures exceptional durability and longevity.
  • No tools needed for installation/removal: The tool-free design makes winterizing significantly faster and easier.
  • Simple and effective design: It does exactly what it’s supposed to do with no unnecessary complexity.

Cons

  • Single-purpose item: It is solely for bypassing filter housings during winterization and has no other function.
  • Gasket is a wear item: While durable, the gasket will eventually degrade and require replacement, unlike the plate itself.


Who Should Buy Watts FP-WP100 Flowmatic Winterizing By Pass Plate?

This bypass plate is an absolute must-have for any plumber, HVAC technician, or DIY homeowner who regularly deals with winterizing water systems in areas prone to freezing. If you service properties with whole-house water filters, or if you maintain your own seasonal cabins, RVs, or vacation homes, this product will streamline your workflow immeasurably. It’s particularly beneficial for those who want to minimize the use of potable water antifreeze, either for cost savings or environmental reasons.

However, if your winterizing tasks do not involve standard filter housings, or if you primarily work with systems that have integrated bypass valves or different winterizing methods, this specific plate won’t be of much use. It is also not intended for systems requiring medical-grade sterility where specialized, single-use components are mandatory. For those who do need it, I’d recommend stocking a spare gasket, as while durable, it is the most likely component to eventually wear out over many years of use.

Conclusion on Watts FP-WP100 Flowmatic Winterizing By Pass Plate

The Watts FP-WP100 Flowmatic Winterizing By Pass Plate is a prime example of a product that excels through its elegant simplicity and robust construction. It directly addresses a common pain point in winterizing plumbing systems, offering a clean, efficient, and cost-effective solution. The economical stainless steel build guarantees a long lifespan, and the tool-free installation makes it a joy to use, saving precious time and effort.

Considering its $39.29 price point and the savings it offers by reducing antifreeze consumption, its value proposition is incredibly strong. It’s a small investment that pays for itself quickly, especially for professionals or frequent users. I wholeheartedly recommend this bypass plate to anyone looking to simplify their winterization process and eliminate unnecessary antifreeze waste. It’s a reliable, durable, and highly effective piece of equipment that simply gets the job done.

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