Is Your Outdoor Faucet Leaking? Here’s the Simple Fix You Need
There is nothing more frustrating for a US homeowner than discovering a dripping outdoor faucet, especially when winter is approaching and you risk frozen pipes. Often, the culprit isn’t the entire hydrant but a small, worn-out internal component known as the check valve. The Arrowhead Brass & Plumbing PK2016 420 Springless Check Valve is the specific, high-quality replacement part designed to stop backflow and leaks in your Arrowhead 420 series frost-proof wall hydrants . In this comprehensive guide, we will walk you through exactly what this part does, why the “springless” design matters, and how you can install it yourself in under 30 minutes to save hundreds on plumber fees.
What Exactly Is the Arrowhead PK2016 Springless Check Valve?
The Arrowhead Brass PK2016 is a specialized brass check assembly engineered specifically for the Arrowhead 420 series of frost-proof wall hydrants . Unlike standard check valves that rely on a metal spring to close the water passage, this unit utilizes a “springless” design, meaning it depends on water pressure and gravity to seal the valve when the water is turned off .
This component is critical for two main reasons:
- Backflow Prevention: It ensures water flows only out of your hydrant and never siphons back into your home’s potable water supply, which is a vital health safety feature.
- Leak Elimination: When the rubber seal on the old valve wears out or the mechanism fails, water drips from the spout or leaks internally; replacing it with the PK2016 restores a watertight seal .
According to manufacturer specifications, the PK2016 is a compact assembly measuring approximately 1 x 0.5 x 0.5 inches and weighs merely 0.1 lbs, making it a lightweight yet durable solution for residential plumbing . It is constructed from high-grade brass and rubber, materials chosen for their resistance to corrosion and ability to withstand fluctuating outdoor temperatures year-round .
Why “Springless”? Understanding the Design Advantage
You might wonder why a valve would be designed without a spring. In the context of frost-proof hydrants installed after 1999, the springless design was adopted to reduce mechanical failure points . Springs can corrode, lose tension over time, or break entirely, leading to immediate valve failure. By eliminating the spring, the PK2016 springless check valve reduces the number of parts that can wear out, offering a more reliable long-term solution for specific hydrant models .
However, it is crucial to note that this part is not universal. It is compatible only with Arrowhead 420 series hydrants that originally came with a springless assembly . If your older hydrant uses a spring-loaded check, this part will not function correctly, and you would need a different replacement kit.
How to Identify if You Need the PK2016 Replacement
Before purchasing parts, accurate diagnosis is key to a successful repair. Not every leaky hydrant needs the PK2016, and installing the wrong part can waste your time and money.
Signs Your Check Valve Has Failed
- Constant Dripping: Water continues to drip from the spout even when the handle is fully closed.
- Internal Leaking: You notice water pooling around the base of the hydrant inside your basement or crawl space.
- Age of Hydrant: Your Arrowhead hydrant was installed after 1999, as models from this era typically utilize the springless design .
- Visual Inspection: Upon removing the stem, you see the existing check assembly lacks a visible coil spring.
The Critical Distinction: PK2016 vs. PK6026
A common point of confusion in the plumbing community is the difference between part numbers PK2016 and PK6026. Recent updates from Arrowhead Brass indicate that the PK2016 has been discontinued and replaced by the PK6026 model . While they serve the same function, the PK6026 is the modern equivalent often found in stores today. If you cannot find the PK2016, the PK6026 is the correct direct replacement for the 420 series springless assembly . Always check the packaging to ensure compatibility with the “420 Series” and “Springless” description.
| Feature | PK2016 (Legacy) | PK6026 (Current Replacement) |
|---|---|---|
| Compatibility | Arrowhead 420 Series (Post-1999) | Arrowhead 420 Series (Post-1999) |
| Design Type | Springless Check Assembly | Springless Check Assembly |
| Availability | Discontinued / Limited Stock | Widely Available |
| Material | Brass & Rubber | Brass & Rubber |
| Function | Prevents Backflow & Leaks | Prevents Backflow & Leaks |
Note: Data compiled from manufacturer discontinuation notices and product catalogs .
Step-by-Step Installation Guide: Replacing Your Check Valve
Replacing the Arrowhead Brass & Plumbing PK2016 420 Springless Check Valve is a straightforward DIY project if you follow the correct steps. You do not need to dig up your yard or replace the entire hydrant.
Tools Required:
- Adjustable wrench or channel locks
- Screwdriver (flathead or Phillips, depending on handle screw)
- Replacement PK2016 (or PK6026) valve assembly
- Plumber’s grease (silicone-based recommended)
- A bucket or towel to catch residual water
Step 1: Shut Off the Water Supply
Locate the shut-off valve for your outdoor hydrant. This is usually found inside your home, in the basement or crawl space, on the pipe leading to the exterior wall. Turn the valve clockwise until it is fully closed. Open the outdoor hydrant handle to drain any remaining water and relieve pressure in the line.
Step 2: Remove the Hydrant Handle
Use your screwdriver to remove the screw securing the handle to the stem. Once the screw is out, pull the handle straight off the stem. If it is stuck due to corrosion, gently wiggle it or use a handle puller tool, but avoid excessive force that could damage the stem.
Step 3: Extract the Stem Assembly
Using your adjustable wrench, loosen the packing nut located just behind the handle area. Once loose, you can unscrew the entire stem assembly from the hydrant body by turning it counter-clockwise . Pull the stem out slowly; some water may drip out, so have your towel ready.
Step 4: Replace the Check Valve
Inspect the bottom of the removed stem. You will see the old check valve assembly secured by a screw or a retaining clip.
- Remove the retaining screw/clip.
- Take out the old, worn check valve.
- Clean the cavity of any debris or mineral buildup.
- Insert the new PK2016 springless check valve into the slot, ensuring it is oriented correctly (the rubber seal should face the direction of water flow closure) .
- Secure it with the original screw or clip.
Step 5: Reassemble and Test
Apply a thin layer of plumber’s grease to the stem O-rings to ensure smooth operation and a good seal. Insert the stem back into the hydrant body and screw it in clockwise until tight. Reattach the packing nut and the handle. Turn the water supply back on slowly and test the hydrant. Check for any leaks at the spout and the base. If no water drips when closed, your repair is successful!
For more detailed technical diagrams, you can refer to the official Arrowhead Brass Repair Guide which provides visual aids for the 420 series .
Springless vs. Spring-Loaded: Which Do You Have?
Understanding the difference between these two valve types is essential for ordering the right part.
Spring-Loaded Check Valves: These use a coiled metal spring to force the valve shut immediately when water flow stops. They are known for closing quickly, which helps prevent “water hammer” (a loud banging noise in pipes) . These are typically found in older hydrant models or different series like the Arrowhead 400 series.
Springless Check Valves (PK2016): As mentioned, these rely on the cessation of water pressure and gravity to close the seal. They have fewer moving parts, which theoretically means less chance of mechanical breakage due to spring fatigue . However, they may close slightly slower than spring-loaded versions. The Arrowhead 420 series specifically transitioned to this design for units manufactured after 1999 .
Comparison Table:
| Feature | Spring-Loaded | Springless (PK2016) |
|---|---|---|
| Closing Mechanism | Metal Spring | Water Pressure/Gravity |
| Closure Speed | Fast (Prevents Water Hammer) | Moderate |
| Failure Points | Spring corrosion/breakage | Rubber seal wear |
| Typical Use | Older models, High-pressure apps | Arrowhead 420 (Post-1999) |
| Replacement Part | Varies (e.g., PK2015) | PK2016 / PK6026 |
If you are unsure which one you have, the safest bet is to remove the stem first and visually inspect the old part before ordering.
Frequently Asked Questions (FAQ)
1. Can I use the PK2016 on an older Arrowhead hydrant installed before 1999?
No, you should not. Hydrants installed before 1999 typically use a spring-loaded check assembly, and the PK2016 is designed specifically for the springless configuration found in newer models . Using the wrong type can result in continued leaking or improper sealing.
2. Is the PK2016 still available, or has it been discontinued?
The original PK2016 part number has been discontinued by Arrowhead Brass and is now replaced by the PK6026 model . The PK6026 is functionally identical and is the correct part to purchase for repairs today. Many retailers still list it as compatible with PK2016 applications .
3. How often should I replace my hydrant check valve?
There is no fixed schedule, but check valves typically last 5–10 years depending on water quality and usage frequency. If you notice dripping, mineral buildup, or difficulty closing the valve, it is time to inspect and likely replace the assembly . Regular maintenance before winter is highly recommended in freezing climates.
4. Do I need to drain my pipes before replacing the PK2016?
Yes, absolutely. You must shut off the water supply to the hydrant and open the faucet to drain residual water before removing the stem assembly . Failing to do so will result in water spraying out when you remove the stem, potentially causing water damage to your interior walls or foundation.
5. What if I replace the valve and it still leaks?
If the new PK2016 springless check valve does not stop the leak, the issue might be with the stem seat inside the hydrant body, damaged O-rings on the stem, or a cracked hydrant body. In such cases, replacing the entire stem assembly (e.g., PK2004-PK2014) or the whole hydrant might be necessary .
6. Is the PK2016 made in the USA?
While Arrowhead Brass is a US-based company, specific components like the PK2016 valve assembly have been noted as manufactured in China in some product listings . However, they are designed to meet US plumbing standards and specifications for frost-proof hydrants.
Conclusion: Save Money and Protect Your Home Today
Dealing with a leaky outdoor faucet doesn’t have to be a costly ordeal requiring a professional plumber. By identifying the problem early and using the correct replacement part like the Arrowhead Brass & Plumbing PK2016 420 Springless Check Valve (or its successor PK6026), you can restore your hydrant’s functionality in less than an hour. This simple repair not only saves you money on water bills but also protects your home from the devastating effects of frozen pipes during harsh US winters.
Remember, a small drip today can become a burst pipe tomorrow. Take action now, gather your tools, and follow our step-by-step guide to secure your plumbing system.
Found this guide helpful? Share it with your neighbors on Facebook or Twitter to help them fix their leaky hydrants before the next freeze hits! Together, we can keep our homes safe and dry.
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