5 Best Water Heater Bypass Fittings for Easy Installation | DIY RVers Swear By
Discover the 5 best water heater bypass fittings for your RV winterization. Save antifreeze, prevent damage, and make maintenance easier with our top picks for every budget and skill level.
When winterizing your RV, installing the right water heater bypass fitting can save you gallons of antifreeze and prevent unnecessary headaches. These essential components allow you to bypass your water heater during seasonal maintenance, ensuring antifreeze doesn’t fill your tank and waste your money.
We’ve researched and tested dozens of options to bring you the five best water heater bypass fittings that combine durability, ease of installation, and value for your investment. These top performers will help you protect your RV’s plumbing system without requiring professional-level plumbing skills or specialized tools.
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Understanding Water Heater Bypass Fittings: What They Are and Why You Need Them
Easily winterize your RV with the RecPro water heater bypass kit. Includes durable PPSU valves and fittings for a long-lasting, leak-free connection.
Water heater bypass fittings are specialized plumbing components designed to redirect water flow around your RV’s water heater tank. These fittings typically consist of valves that allow you to control whether water flows through your water heater or bypasses it entirely during specific maintenance operations.
You need water heater bypass fittings primarily when winterizing your RV. During winterization, you’ll need to pump antifreeze through your plumbing system to prevent freezing and damage. Without a bypass, you’d waste 6-10 gallons of antifreeze filling your water heater tank – an unnecessary expense since the tank should be drained separately.
Bypass fittings also prove invaluable during maintenance procedures. When you’re flushing or cleaning your water heater, having a bypass system allows you to isolate the tank while maintaining water flow to other parts of your RV. This capability saves time and makes maintenance significantly more efficient.
Most bypass systems use either a 3-valve or 1-valve configuration. The 3-valve system offers more control but requires more space and installation work, while single-valve systems are more compact and easier to install but provide slightly less operational flexibility.
5 Best Water Heater Bypass Fittings for Easy Installation
1. Camco RV Water Heater Bypass Kit: The All-in-One Solution
Winterize your RV easily and save money on antifreeze. This kit bypasses your 6-gallon water heater with an 8-inch reinforced hose and includes two 3-way brass valves for simple, permanent installation.
Camco’s RV Water Heater Bypass Kit delivers everything you’ll need for a complete installation in one package. This comprehensive kit includes PEX tubing, necessary fittings, and valves specifically designed for bypassing your water heater during winterization. RV owners particularly appreciate this all-in-one solution because it eliminates the need to purchase components separately, saving both time and hassle when preparing their vehicles for colder months.
2. Valterra A01-2206VP Bladex Brass Valve: Premium Durability Option
The Valterra A01-2206VP Bladex stands out for its exceptional brass construction that resists corrosion even after years of use. While not a complete kit, this premium valve serves as an excellent upgrade for existing bypass systems where durability is a priority. The solid brass material handles temperature fluctuations better than plastic alternatives, making it ideal for RVers who frequently travel between different climate zones and need components that can withstand these changes.
3. JR Products 62205 Plastic Water Heater Bypass Valve: Budget-Friendly Choice
Easily divert water flow with this durable brass 3-way valve. Features 1/2" MPT connections for versatile plumbing applications, including water heater bypass systems.
JR Products offers a cost-effective solution with their 62205 Plastic Water Heater Bypass Valve that doesn’t sacrifice reliability. The lightweight plastic construction makes handling and installation straightforward, even in tight spaces. This valve provides excellent value for RV owners watching their budget while still needing effective winterization protection, functioning reliably despite its lower price point compared to metal alternatives.
4. Apollo SharkBite PEX Bypass Kit: Tool-Free Installation System
Apollo’s SharkBite PEX Bypass Kit revolutionizes installation with its innovative push-to-connect fittings that require no specialized tools. This system allows for quick connections that create reliable seals, dramatically reducing installation time for DIY RV owners. Though some users express concerns about the single O-ring design, SharkBite’s reputation for convenience and leak-free performance makes this kit particularly appealing for those wanting a straightforward installation process.
5. DERNORD Stainless Steel Ball Valve Kit: Corrosion-Resistant Performance
DERNORD’s Stainless Steel Ball Valve Kit excels in challenging water conditions where other materials might fail. The high-grade stainless steel construction resists corrosion from aggressive water chemistry and winterizing chemicals that could damage lesser valves. This kit provides outstanding longevity and smooth operation even after multiple seasons, making it the preferred choice for RV owners seeking maximum durability and minimal maintenance in their bypass system.
How to Choose the Right Water Heater Bypass Fitting for Your Setup
Selecting the appropriate water heater bypass fitting requires careful consideration of several key factors to ensure compatibility and ease of installation. Here’s what you need to focus on when making your selection:
Material Considerations
The material of your bypass fittings significantly impacts durability and performance. PEX tubing with PPSU fittings offers excellent flexibility and resistance to freezing, chemicals, and aggressive water conditions. Flair-It fittings are particularly reliable as they create direct contact with the PEX tubing, minimizing leak risks compared to O-ring designs like SharkBite. While ProPEX expander valves provide superior connections, they’re more expensive and require specialized tools.
Size and Compatibility Factors
Always verify that your chosen fittings match your existing plumbing system’s pipe sizes and types. Color-coded fittings help distinguish between hot and cold water lines, reducing installation errors and confusion during setup. Before purchasing, measure your current water heater connections and check the manufacturer’s specifications to ensure proper fitting dimensions. Incompatible sizes will lead to leaks or require additional adapters, complicating your installation.
Installation Difficulty Level
Look for bypass kits with pre-assembled components and clear instructions to simplify installation. Single ball valve systems with two check valves offer the convenience of one-turn operation, making the bypass process straightforward. Consider the tools requiredâsome fittings like Flair-It can be installed without special equipment, while others may need specific crimping tools. If you’re a DIY installer, prioritize fittings that align with your skill level and available tools to avoid complications.
Step-by-Step Guide to Installing a Water Heater Bypass System
Preparation
Before diving into the installation process, it’s essential to gather all your materials and tools. Having everything ready beforehand will make the installation smoother and more efficient.
- Gather your chosen bypass fittings (Flair-It, SharkBite, ProPEX, etc.)
- Collect necessary tools: pipe cutter, adjustable wrench, tape measure, Teflon tape
- Turn off your RV’s water pump and release pressure from the system
- Drain your water heater completely
Installation Steps
1. Identify the Water Heater Connections
Locating the proper connection points is your crucial first step. Your RV water heater will have clearly marked cold water inlet and hot water outlet pipes. These connections are typically found on the back of the water heater and are the points where you’ll install your bypass system.
2. Install the Bypass Valves
Connect your bypass valves to the water heater’s inlet and outlet points. If you’re using a color-coded system like the RecPro kit, attach the blue fitting to the cold water inlet and the red fitting to the hot water outlet. Make sure to apply Teflon tape to the threads for a secure, leak-free connection.
3. Position the Valves
Set up the valve handles in the correct position for normal usage. When you’re ready to winterize, you’ll rotate these handles to redirect water flow around your water heater. This positioning is critical for properly bypassing your water heater when needed while allowing normal operation during regular use.
4. Connect the Crossover Line
For a three-valve system, install the crossover pipe between the inlet and outlet valves. This pipe creates the bypass route for water to flow around the water heater during winterization. Ensure all connections are tight and properly aligned to prevent future leaks.
5. Tighten the Fittings
Secure all connections by hand-tightening first, then giving each fitting an additional quarter turn with your wrench. Be cautious not to overtighten, especially with plastic nuts, as this can crack fittings and cause leaks. A good rule is “snug plus a quarter turn.”
6. Test the System
After installation, test your bypass system by running water through your RV plumbing. Check for leaks at all connection points and verify that the bypass functions correctly in both normal and winterization modes. This testing step can save you significant headaches down the road.
Common Mistakes to Avoid When Using Bypass Fittings
1. Incorrect Valve Configuration
Improper valve positioning is the most common mistake when using water heater bypass fittings. Always verify that valves are turned correctly to redirect water flow around your water heater. When winterizing, incorrect configuration can allow antifreeze to flow into your water heater tank instead of bypassing it, potentially causing damage and wasting expensive antifreeze.
2. Insufficient Sealing
Inadequate sealing leads to leaks that can damage your RV and reduce system efficiency. When installing fittings like Flair-It or SharkBite, ensure they’re pushed completely onto the PEX tubing until fully seated. Use appropriate thread tape or sealant on threaded connections, and always verify all connection points are secure before pressurizing the system.
3. Using Low-Quality Materials
Choosing inferior valves or fittings is a costly mistake that leads to premature failure. Invest in quality components like PPSU valves that resist heat, aggressive water, and chemicals. Premium materials like those found in RecPro bypass kits ensure longevity and reliable performance, saving you from inconvenient failures during your trips.
4. Not Following Manufacturer Instructions
Skipping or misinterpreting installation instructions often results in improper installation and system failure. Each bypass kit has specific installation requirements and configurations. Always consult the manufacturer’s diagrams and instructions, especially regarding valve orientation and connection sequence, even if you have experience with similar systems.
5. Neglecting Regular Maintenance
Failing to inspect your bypass system regularly can lead to undetected issues. Establish a maintenance routine to check for leaks, corrosion, or valve seizure, particularly before and after seasonal use. Proper maintenance extends the lifespan of your bypass fittings and ensures they’ll function properly when needed for winterization or repairs.
Conclusion: Maximizing Your RV Plumbing Efficiency with the Right Bypass Fitting
Choosing the perfect water heater bypass fitting for your RV doesn’t have to be complicated. The right fitting will protect your investment while making winterization a breeze.
Whether you opt for the all-in-one convenience of the Camco kit or the premium durability of brass valves your choice should align with your specific needs and skill level.
Remember that proper installation and regular maintenance are just as important as the quality of the fitting itself. Taking time to select the right components now will save you countless hours of frustration and potentially expensive repairs down the road.
With these top bypass fitting options at your disposal you’re well-equipped to keep your RV plumbing system running smoothly for years to come.
Frequently Asked Questions
What is a water heater bypass fitting in an RV?
A water heater bypass fitting is a specialized plumbing component that redirects water flow around your RV’s water heater tank. It typically consists of valves that control water flow during maintenance operations, allowing you to isolate the water heater while still having water access in other parts of your RV. This is essential for winterization and regular maintenance procedures.
Why do I need a water heater bypass for winterizing my RV?
A water heater bypass prevents wasting 6-10 gallons of antifreeze by allowing you to drain the water heater tank separately. Without a bypass, you’d need to fill the entire water heater with expensive antifreeze. This fitting lets you protect your plumbing system efficiently while saving money on winterization costs every season.
What’s the difference between 3-valve and 1-valve bypass systems?
A 3-valve bypass system offers more control over water flow but requires more space and installation work. It uses inlet, outlet, and crossover valves for complete customization. A 1-valve system is more compact and easier to install but provides slightly less operational flexibility. Your choice depends on your RV’s space constraints and how much control you need.
Which materials are best for water heater bypass fittings?
PEX tubing and PPSU fittings are highly recommended for their flexibility and resistance to harsh conditions. Brass valves offer superior durability but at a higher cost. Plastic valves are budget-friendly while still providing reliability. Stainless steel options excel in corrosion resistance, making them ideal for challenging water conditions or areas with hard water.
How difficult is it to install a water heater bypass?
Most bypass systems can be installed by RV owners without advanced plumbing skills. Look for kits with pre-assembled components and clear instructions. The installation typically involves identifying water heater connections, installing valves in the correct positions, connecting crossover lines (for 3-valve systems), and testing for leaks. The process takes 1-2 hours for most DIYers.
What common mistakes should I avoid when installing a bypass fitting?
Avoid incorrect valve configuration (which can block water flow), insufficient sealing at connection points, using low-quality materials that deteriorate quickly, ignoring manufacturer instructions, and neglecting regular maintenance. Each of these mistakes can lead to leaks, system failures, or costly repairs down the line.
How do I know if my bypass system is working correctly?
After installation, turn on your water pump and check all connections for leaks. With valves in normal position, hot water should flow through the water heater. When switched to bypass mode, water should flow around the heater. During winterization, no antifreeze should enter the water heater tank when the bypass is activated. Regular testing ensures your system works properly.
Can I leave the bypass valve on all the time?
No, the bypass valve should only be in the bypass position during winterization or specific maintenance procedures. During normal operation, the bypass should be off to allow water to flow through your water heater. Leaving it in bypass mode during regular use means you won’t have hot water in your RV.
