3/8-Inch Blue UberFlex Car Wash Bay Drop Hose - 18 Feet

Upgrade the hose connected to your boom in your self-serve car wash bays with the UberFlex 646200618 drop hose. Made with a proprietary matte-textured thermoplastic cover and textile-braid reinforcement, this 3/8-inch hose withstands serious abrasion and daily use in self-serve car wash bays. Thanks to its unique patented construction, it is up to 30% lighter than equivalent rubber counterparts and super flexible. It handles like an extension cord. This makes it easier for your customers to move the boom, hose, and spray gun assembly around the vehicle. The thermoplastic cover is also resistant to UV, ozone, and car wash chemicals. This helps to increase the longevity of your hoses, reduces bay downtime, and lowers long-term equipment replacement costs.

Please note that this hose is rated strictly for cold-water applications and is not designed for applications above 140°F or steam systems.

Benefits:

• Extreme Abrasion Resistance: ProPulse's proprietary matte-textured cover is five times more abrasion-resistant than standard rubber covers, preventing premature wear from customers dragging them across bay floors.
• Lightweight Design: Weighing up to 30% less than traditional alternatives, this hose is easier to handle and reduces user fatigue for a more comfortable experience in the bay for your customers. It is also a comfortable option for attendants who prep vehicles before they enter the tunnel.
• Non-Marking Cover Material: The specialized thermoplastic cover won't leave marks on customer vehicles or bay floors and walls.
• Handles Like an Extension Cord: Highly resistant to permanent kinking and snagging, which prevents a common cause of premature hose failure. This helps customers move around vehicles more freely without the limits of standard hoses or kinks.
• Durable, Chemical-Resistant Construction: Engineered and constructed with materials to withstand harsh wash environments, offering unmatched resistance to UV, ozone, and car wash chemicals.
• Proven Longevity: Rated and tested by ProPulse for 200,000+ impulse cycles, handling constant on-off trigger use by customers throughout the day without premature failure.

Specifications:

• Manufacturer Product Number: 646200618
• KR Product Number: HUF186BL
• Inner Diameter: 3/8"
• Working Pressure (Max): 4000 PSI
• Burst Pressure (Min): 3:1 Working Pressure
• Temperature Rating (Max): 140°F (Cold-Water Only)
• Connectors: SOLxSOL (Solid by Solid)
• Threading: 3/8" MNPT
• Color: Matte Blue (BL)
• Length: 18'
• Impulse Life: 200,000+
• Reinforcement: Textile Braid
• Cover Material: Matte Textured Thermoplastic

How the Pretzel Test Shows UberFlex Hose Performance

ProPulse developed a creative way to showcase the exceptional flexibility and durability of UberFlex hoses. They call it the "Pretzel Test." Try to form a pretzel twist with many common pressure washer hoses, and you'll notice they snag, kink, and stick to themselves almost immediately. This happens because many standard hoses use stiff materials and tacky outer covers that reduce flexibility and make handling harder. Here is where the UberFlex hose shines. It moves smoothly and resists tangling, making it far easier to maneuver. If you want to try this test, see the instructions below.

Pretzel Test Instructions

1. Take a piece of PVC pressure washing hose and place your hands near the ends of the hose.
2. Cross the ends and make a loop.
3. Position your hands to fold the top end beneath the bottom end, then guide it through the loop.
4. Grip the hose firmly at both ends and pull. Notice how it catches and resists movement.
5. Now try the same thing with the UberFlex hose if you have one or once you get one on hand.

Notice the difference?

UberFlex Maximizes In-Bay Hose Performance

Running a profitable self-serve car wash depends on reliable equipment that withstands constant use, harsh wash conditions, and is easy for customers to use. The hoses connected to your ceiling booms and spray guns are handled by every single customer who enters your bays. Inferior hoses create a poor experience by being heavy, stiff, or difficult to maneuver around vehicles.

UberFlex hoses are engineered to solve these operational challenges. By significantly reducing the weight of the hose assembly, customers can navigate around their vehicles with ease and minimal drag. This overall ease of handling directly translates to reduced customer frustration and higher customer satisfaction. Additionally, the superior flexibility and friction reduction of UberFlex's thermoplastic cover ensures that the fluid line naturally follows the user as they maneuver around their vehicle, mitigating the risk of the hose snagging on mirrors, bumpers, or license plates.

Advanced Thermoplastic vs. Rubber Construction

Cover material directly impacts the service life of hoses used in car washes or by professional pressure washers. Standard rubber hoses can wear quickly when dragged across abrasive concrete, asphalt, brick, and rocky surfaces. As the outer cover wears down, the reinforcement becomes exposed, which can lead to leaks or hose failure.

The ProPulse UberFlex uses a durable thermoplastic cover built for bay wash use. This cover is five times more abrasion-resistant than standard rubberized covers and up to 30% lighter than comparable rubber hose. Its low-friction matte-textured surface helps the hose move across the floor with less dragging and cover wear.

This thermoplastic cover also resists the conditions common in self-serve bays. It resists chemicals, UV exposure, and ozone to help prevent the drying, cracking, and weakening that often shorten the life of standard rubber hoses when used outdoors. The hose stays flexible and is easier to handle in daily use.

Thermoplastic is also truly non-marking. It will not leave black streaks on vehicle panels if the hose contacts the surface during a wash. It also won't mark your bay floors and walls. Additionally, the matte-textured thermoplastic cover helps pressure-wash professionals prevent surface marks and protect their hose from abrasion as they drag it through job sites.

Hose Diameter and Impact on Flow Rates:

When outfitting wash bays, owners often evaluate various hose specifications. Selecting the correct inner diameter is a critical specification because it directly impacts flow rate. A common question among newer operators is whether a 3/8-inch or 1/4-inch hose is the better choice for their specific application.

In commercial self-serve car wash bays, the 3/8-inch diameter is the industry standard. A 1/4-inch hose restricts the volume of water (Gallons Per Minute, or GPM) that can pass through the line. While a smaller diameter might maintain pressure, the restricted flow limits the flushing action needed to rinse heavy soils, soaps, and road grime off a vehicle.

Installation Instructions

Correct installation is essential to maximize the service life of your new equipment. The ProPulse UberFlex drop hose comes equipped with SOLxSOL (Solid by Solid) connectors. Installs like a standard car wash hose and connects easily to compatible systems.

1. De-pressurize the System: Always turn off the pump and squeeze the trigger gun to relieve pressure in the line before starting any work. Follow Lockout/Tagout to ensure the safety of the person performing the hose change.
2. Remove the Existing Hose: Detach the old hose from the ceiling boom and the trigger gun. Inspect the boom fittings and gun inlet for damaged threads or excessive scale buildup, and clean the threads when necessary.
3. Prepare the Threads: Apply a high-quality PTFE thread seal tape or liquid thread sealant to the male threads of your boom's outlet and gun's inlet connection. Ensure the sealant does not overlap the end of the fitting, which could introduce debris into the water stream and clog the spray nozzle.
4. Attach the Hose to the Boom: Thread one end of the hose onto the ceiling boom. Use two wrenches—one to hold the boom fitting steady and one to tighten the hose connection. Avoid over-torquing, as this can strip the threads or crack the fitting.
5. Attach to the Spray Gun: Because this hose utilizes SOLxSOL fittings, installing a high-pressure inline swivel between the hose and the trigger gun is highly recommended. A swivel allows the gun to rotate freely. This prevents the hose from twisting during use, helping it last longer. Attach the swivel to the gun first and then connect the hose.
6. Test the Connection: Turn on the pump system, pressurize the line, and inspect both connection points for leaks. Verify that the hose hangs naturally without tight coils or severe bends.

Increase Longevity with Preventative Maintenance

While the ProPulse UberFlex drop hose is manufactured to be extremely durable. You can maximize the lifespan by implementing a routine inspection schedule. This prevents unexpected bay downtime and helps to ensure customer safety.

One of the most impressive technical specifications of this 3/8" hose is its 200,000+ impulse life rating. Impulse life refers to a hose's ability to withstand repeated pressure cycling every time a trigger gun is pulled and released. A rating of over 200,000 cycles means this hose is built for the constant, rapid on-off use by customers in busy commercial car wash bays. This helps differentiate this hose as a high-quality option designed for these commercial applications.

To maximize the lifespan of this ProPulse hose, technicians should inspect it weekly. Look for signs of severe abrasion where the hose might be repeatedly rubbing against a sharp concrete edge, metal boom bracket, or other surface that is cutting into it.

If you notice severe damage or leaks, do not attempt to repair your hose. The fix may work for a very short time, but it will always fail. We always recommend purchasing a replacement hose. Need more detail? Read why replacing a pressure washer hose is the safer option.

Ensure that bend restrictors (if utilized in your setup) are properly seated to prevent the hose from bending beyond its minimum bend radius at the connection points. Check that swivels on your equipment rotate freely; a seized swivel forces the hose to absorb rotational stress, which can lead to premature wear and failure over time.

Since this hose is for cold-water applications, not hot, ensure your water heating systems (if applicable) are correctly regulated so that water entering this hose never exceeds its maximum temperature rating of 140°F. Exceeding this limit is not recommended by the manufacturer and may lead to hose damage or failure.

Frequently Asked Questions

Who makes UberFlex pressure washer hose?

UberFlex hoses are manufactured by ProPulse, a Schieffer Company. This is a highly respected company known for engineering advanced hoses that undergo rigorous testing. ProPulse specifically designs the UberFlex line utilizing patented thermoplastic technology to serve the demanding needs of the commercial cleaning and car wash industries.

What is an SOL connection?

SOL is ProPulse shorthand for “solid.” A SOL fitting is rigid, which means the hose end does not swivel. Knowing what this connector style means will help you pick the correct hose configuration before ordering or installation.

Which pressure washer hose is better, UberFlex or Flexzilla?

Both brands manufacture flexible hoses, but they serve different primary functions. This 3/8" UberFlex pressure drop hose is engineered specifically for use in car wash bays. It is rated up to 4000 PSI and utilizes a proprietary matte-textured thermoplastic cover that is highly abrasion-resistant and non-marking. It is the preferred choice for commercial car wash bays due to its durability, chemical resistance, and extreme impulse life rating. Flexzilla is well-known for air hoses and garden hoses, and while they do produce pressure washer products, UberFlex drop hose 646200618 is specifically built for the rigors of a professional car wash environment.

Will any pressure washer hose fit any pressure washer or car wash pump?

No. Hose compatibility depends on four key specifications: thread size, working pressure, maximum temperature, and the maximum flow rate produced by the pump on your pressure washer or car wash system. You cannot attach a low-pressure or garden hose to a high-pressure commercial pump. The hose will burst. Nor should you use a cold-water hose on a steam system. Avoid using a hose with an inner diameter that is too small, because it will restrict fluid flow. Always verify your equipment specifications before purchasing replacement parts. 

You can usually connect a hose to a pump from any reputable commercial car wash pump manufacturer as long as the hose size, pressure rating, and end connections match the pump specifications. This includes brands such as CAT Pumps, General Pump, Giant Pump, Comet, Udor, Arimitsu, and AR North America. For a 3/8" hose, confirm that the fittings, working PSI, and application requirements line up before installation.

If the connections do not match, adapters can be used to make the hose and pump compatible. That said, using the correct hose and pump with the correct connection combination is the better option in most cases. Adapters add another connection point, which can increase the chance of leaks or failure over time.

If you need help picking the perfect replacement pressure washer hose, read our professional guide for clear, practical details on hose size, PSI rating, fittings, flexibility, and safety considerations.

Note: We cannot guarantee compatibility with every pressure washer, hose reel, gun, wand, or fitting.

Where can I buy UberFlex hose?

You can purchase UberFlex hose from us at Kleen-Rite. We stock multiple models of these 3/8" drop hoses for your car wash bays. Available lengths include 12', 15', and 18', with matte black and matte blue options for different bay setups or to match your branding.

Why Order from Us at Kleen-Rite?

Get your order fast! Our strategically located warehouses help us ensure orders with delivery addresses in the lower 48 states receive their deliveries within 3 days. Plus, we have a generous rewards program that helps you save on shipping and rewards you with Kleen-Kash that can be redeemed to lower the cost of your orders.

Note: These delivery times may be impacted by order submission time cutoff, inclement weather, and other extenuating circumstances.

Returns and Exchange Policies

Due to the wide range of manufacturers we support, warranty coverage and return policies can vary by manufacturer and product. For official details, please review our warranty information and returns policy.

Ways to Save on Shipping and Earn Rewards

Explore the Kleen-Rite Loyalty Rewards program and find out all the ways you can earn points and get rewards to ship your supplies for free. We also have special free shipping options during the year. For example, we include a code for free shipping in our Kleen-Scene magazine published twice a year (February and August).

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm (For more information go to www.p65warnings.ca.gov).