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Valterra Hydroflush Reverse Flush Adapter for RV Holding Tanks and Sewer Hoses - 45-Degree

Valterra Hydroflush Reverse Flush Adapter for RV Holding Tanks and Sewer Hoses - 45-Degree

Item # F02-4100
Our Price: $26.19
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RV Waste Valves
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Shipping Weight: 0.73 lbs
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45-Degree flush adapter lets you to rinse out your wastewater tanks and flush out your sewer hose, breaking up clogs and cleaning tank sensors. Built-in backflow preventer keeps water source contaminant-free. Clear barrel shows when tanks are clean. Great Prices for the best rv waste valves from Valterra. Valterra Hydroflush Reverse Flush Adapter for RV Holding Tanks and Sewer Hoses - 45-Degree part number F02-4100 can be ordered online at or call 1-800-940-8924 for expert service.
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Valterra RV Waste Valves - F02-4100

  • Flush Valves
  • Stationary Valve
  • Valterra

45-Degree flush adapter lets you to rinse out your wastewater tanks and flush out your sewer hose, breaking up clogs and cleaning tank sensors. Built-in backflow preventer keeps water source contaminant-free. Clear barrel shows when tanks are clean.


  • Flush adapter allows you to force fresh water through your holding tanks and sewer hose from outside of your RV
    • Breaks up clogs in plumbing lines
    • Cleans tank probes to help prevent false readings on monitors
    • Eliminates the need to use tank wands and rinsers
  • Built-in backflow preventer keeps water source free from contaminants
  • Clear barrel lets you see when your tanks are clean
  • Blue knob allows you to direct the flow of water
    • "Tank" backflushes your black-water and gray-water tanks
    • "Hose" rinses your sewer hose
    • "Off" stops the flow of water
  • Simple installation and removal - no tools required
    • Easily refill and flush tanks at any height or bend of plumbing
    • Bayonet fitting secures to standard 3" lug fitting on RV's waste valve
    • 3" Lug fitting allows you to connect to sewer hose
    • Rinse hose (sold separately) connects to the female coupling on barrel

45-Degree Hydroflush attached to flush valve

The bayonet fitting on the 45-degree Hydroflush twists onto a standard 3" lug fitting on an RV waste valve. The seal inside the fitting helps prevent leakage at the connection point.

F02-4100 Valterra RV Hydro Flush Reverse Flush Valve Adapter for Motorhome Holding Tanks and Drain Hose - 45-Degree

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Customer Satisfaction Score:

Customer Reviews

Valterra Hydroflush Reverse Flush Adapter for RV Holding Tanks and Sewer Hoses - 45-Degree - F02-4100

Average Customer Rating:  4.6 out of 5 stars   (56 Customer Reviews)

45-Degree flush adapter lets you to rinse out your wastewater tanks and flush out your sewer hose, breaking up clogs and cleaning tank sensors. Built-in backflow preventer keeps water source contaminant-free. Clear barrel shows when tanks are clean.


The quality of all the products and accessories I have bought at e-trailer for my trailer conversion project is great:
EZ Coupler RV Sewer Hose Kit w/ Swivel Fittings and 4-in-1 Clear Adapter - (2) 10' Long Hoses - D04-0115: Great Hose and couplers!
Valterra Hydroflush Reverse Flush Adapter for RV Holding Tanks and Sewer Hoses - 45-Degree - F02-4100: Awesome solution to clean up the tanks thoroughly!
Valterra Waste Valve for RV Black Water Tank - 3" Spigot to 3" Lug - T50A: Great valves so far!
Scissor Stabilizer Jack - 18-3/4" Travel - 2,500 lbs - Qty 1 - TJSC-24: Great product, performing as expected.


I have to say at the outset that I use this with another gadget that attaches to it. The second gadget is a valve that allows me to stop the flow down the sewage line. Together, they accomplish two separate things.

If the plumbing really gets jammed, closing the valve, and running water into the Hydroflush, forces the jam back into the tank, thus loosening it. DON'T DO THIS IF YOUR TANK IS FULL, UNLESS YOU WANT A REAL MESS IN YOUR BATHROOM, OR WANT TO BLOW UP A TANK.

The second useful thing you can do with this rig is open and drain your sewage (black water) tank, then close the valve on the gadget. Finally, with this valve closed and the black water valve still open, open your gray water valve. Gray water will try to get down the sewage line, and be blocked by the gadget's valve. Then it will flow backwards into your black water tank. After a couple of minutes, open the gadget's valve and watch all the gunk flow out of your "emptied" black water tank. This is a great way to help keep that tank cleaner and flowing well.

Of course you could do this by connecting a water hose to the Hydroflush, but it's more work.

The Hydroflush is a great, and well made product. It also lets you see what is really going on with your system.


I had this Valterra Hydroflush on my previous camper but thought I’d give a similar Campco product a try. The Campco did not provide the rinse force needed to do a good job rinsing my holding tanks. So back to the Valterra which has the necessary pressure. Highly Recommended.

After a year working fine with no leaks.
Victor - 06/12/2019


I’ve now placed my 3rd order with etrailer; each order has been promptly filled and has arrived sooner than my expectations! etrailer has now become my “go to” company for my RV needs.
Additionally, their prices are some of the most competitive around.


As described !!!!!!!


Nice product and thoughtful design. However, on mine, a little plastic part at the top that serves no obvious function other than perhaps to add a holding strap was broken. It does not affect the use of the connector but it is upsetting to get something new with a broken piece.


The concept of the product is overall good, but the piece where the nozzle goes into the adapter is a little problematic. It has to go in there just right or it could be damaged. I wish the manufacturer would address this possible problem, and make that area of the adapter beefier


units works great. Helps to identify when the tanks are running clear. I would recommend this unit.


etrailer gave great support and service. I would recommend them to anyone!
Received the products on time.


It took a littler long to get here but have to consider the state of our country i have ordered thing from her a few time and i love there products and services and have already referred others thank you


fast free delivery. I have not used this particular product yet but have had one in the past it really helped to keep the black tank clean. You can actually see the debris as it comes out so you know the product is cleaning out left over debris and sewage.


I have a long drain approach, and this items is very hand in cleaning out the line itself.


Very satisfied with everything we purchased from etrailer!


This thing works a little to well. It cleaned the black water tank great. It made the gage work again. I wouls highly suggest this product. It works awesome.


I have not had the opportunity to use this yet. It is very solidly constructed and was shipped super fast.


would give it 5 stars but haven't used it yet I believe its just what I need to clean out the tank at the dump station plus with it being clear will be able to see when tank is clean!


I prefer this product to the type that that advertises both hose & tank clean out. I get a much better tank clean out, and I can put a cap on it and rinse the hose as well.


We like the clear connection and the added rinse/flush power when using built in tank flush on our TT


My order arrived promptly, but I have not had time yet to use it. My Friend Ron swears by it. I will add a more complete review when I use it.


Prompt shipping; products were as described. Looking forward to using it!


Works good

Still works great
Jack R - 03/22/2019


Received everything promptly and still using today. +A


works well



shipped fast just as i ordered

Show More Reviews

See what our Experts say about this Valterra RV Waste Valves

  • Can Valterra 45-Degree RV Hydroflush # F02-4100 Be Used with Standard Garden Hose
    You can use a standard garden hose with the Valterra 45-Degree RV Hydroflush # F02-4100. It is not necessary to use a specialized type of hose, nor a high-pressure hose. I confirmed this with my contact at Valterra.
    view full answer...
  • What Does Valterra Hydroflush Fit Onto?
    The bayonet fitting of the Valterra Hydroflush Reverse Flush Adapter # F02-4100 will twist onto the standard 3 inch lug fitting on your RV waste valve. It also contains a seal inside to stop any type of leakage. I have attached a link to a video review of this product for you to take a look at.
    view full answer...
  • Can Valterra Hydroflush Reverse Flush Adapter Stay Installed
    You can leave the Valterra Hydroflush Reverse Flush Adapter # F02-4100 installed all the time if you wish, but that just means there is more likely of a chance that this could get damaged depending on how low or far out it will be sitting. If you are asking about whether or not to just leave the waste valve open all the time then I guess that could be okay as long as you have a dump station dedicated to your camping location.
    view full answer...
  • Should I Get the Hydroflush with a 45 or 90 Degree Bend
    The 45 degree, part # F02-4100, and the 90 degree, part # F02-4110, Hydroflush Reverse Flush Adapters are the same product other than the bend in the line. Which is beter for you depends on your specific application. Most people seem to prefer the 45 degree angle works better for them because of where the waste valve is located on their RV. For some the waste valve is very low and close to the ground so the 90 degree makes it easier.
    view full answer...
  • Flushing the Gray Water Tank on an RV
    What I recommend to flush your gray water tank is the Tornado 360-Degree RV Holding Tank Rinser # CAM40126. Install this into the tank, connect a hose, and flush out the tank! I have included a link to a video review of this product for you.
    view full answer...
  • Does the Valterra Hydroflush Reverse Flush Adapter # F02-4100 Have a Quick Disconnect
    The Valterra Hydroflush Reverse Flush Adapter # F02-4100 itself does not have a quick disconnect fitting for your hose but one can simply be added. We have the Camco Quick Hose Connect # CAM20135 that you can install on the reverse flush adapter to quickly connect and disconnect your water hose. This features an automatic shut off when it is disconnected which prevents you from getting sprayed with water as the fittings are disconnected. I have attached some review videos for you to check...
    view full answer...
  • Will Waste Master RV Sewer Hose # LC359724 Work with Dump Station Connection at 45 Degree Angle
    Since the mobile home park's dump station has a connection that is at an angle you may have to hold the business end of Waste Master RV Sewer Hose # LC359724 in place so it won't fall out. Other than that possibility it will still work. If your RV does not have a connection for a hose to clean out the tank and hose you might consider adding something, such as # F02-4100, so you can get all of the stuff out of the sewer hose.
    view full answer...
  • Recommended Flushing Hose to Use with Valterra Hydroflush Adapter # F02-4100
    Yes, the Valterra Hydroflush Reverse Flush Adapter # F02-4100 referenced in your question is designed to fit with and will work perfectly with your 15 Foot Long Flushing Hose # W01-4180. The bayonet fitting will then secure to a standard 3 inch lug fitting on the RV's waste valve and the 3 inch lug fitting allows you to connect a sewer hose. I have attached a short video demonstration on this product that you can also take a look at.
    view full answer...
  • Is the Anti-Siphon Piece for Valterra Hydroflush Reverse Flush Adapter # F02-4100 Available
    The anti-siphon piece that comes with the Valterra Hydroflush Reverse Flush Adapter # F02-4100 is available as a replacement part. You can find it listed as part # A01-0141VP on our site. This will keep you from having to purchase the whole kit for that one piece.
    view full answer...
  • Garden Hose Adapter for Valterra HydroFlush / Flush King
    The only replacement part we sell for the Valterra # F02-4100 flush valve is the Valterra # A01-0141VP anti siphon valve.
    view full answer...
  • Trunk Bike Rack Recommendation for 2018 Kia Sorento with Spoiler
    For your 2018 Kia Sorento the Hollywood Racks Over the Top part # HRF2-3 would be a great option. It's a confirmed fit for your vehicle and is specifically designed to fit over spoilers like what you have so it would be a great option. If you plan on carrying any womens or alternative framed bikes without horizontal top tubes you may also be interested in purchasing a Kuat Bike Frame Adapter Bar # UB01 to provide a horizontal top tube on your bikes to provide an attachment point. I attached...
    view full answer...
  • Are Any Additional Fittings Needed for the Valterra Hydroflush # F02-4100
    The Valterra Hydroflush # F02-4100 has the bayonet male and female ends so it will sit directly in between the waste valve on your 1983 Shasta and your sewer hose. Your standard hose, like the Valterra Flushing Hose # W01-4180 then connects to the Anti-Siphon Valve # A01-0141VP (which is included) which, in turn, connects to the Hydroflush. The only time you would need an adapter on one of your hoses is if they already have some sort of adapter on them, but you could most likely remove...
    view full answer...
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  • Recommended Hose to Use with the Valterra Hydroflush Reverse Flush Adapter # F02-4100
    We do have some hoses that you can use with the Valterra Hydroflush Reverse Flush Adapter # F02-4100. You will just need to choose one that is best for your application. I recommend going with a Valterra Flushing Hose for your RV sewer system. This is available in 15 feet, part # W01-4180, and 25 feet, part # W01-4300. I also recommend using a quick disconnect like the Camco part # CAM20135 to make clean up quicker.
    view full answer...
  • Recommendations For Replacing RV Water System Components
    I drew up a little diagram of how RV water systems are typically designed and attached it below to make it easier for you to see each component. I believe what you're referring to is simply just the fresh water tank drain, which you could use part # CAM22243 to tie into your tank and allow it to drain. The Anti-Siphon valve # A01-0141VP you were looking at simply connects to a Valterra Hydroflush # F02-4100 for you to hook up a garden hose and clean out your black tank. For the fresh...
    view full answer...
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