--- product_id: 3250276 title: "Flush King™ 45 Degree Reverse Flush Valve Attachment for RV, Camper, Trailer | Clear body shows when water runs clean, anti-siphon backflow preventer, 360 degree swivel bayonet fittings, leak-proof" brand: "valterra" price: "¥15378" currency: JPY in_stock: true reviews_count: 13 category: "Valterra" url: https://www.desertcart.jp/products/3250276-flush-king-45-degree-reverse-flush-valve-attachment-for-rv store_origin: JP region: Japan --- # 45° reverse flush angle clear walls for visual flow check 360° swivel leak-proof bayonet Flush King™ 45 Degree Reverse Flush Valve Attachment for RV, Camper, Trailer | Clear body shows when water runs clean, anti-siphon backflow preventer, 360 degree swivel bayonet fittings, leak-proof **Brand:** valterra **Price:** ¥15378 **Availability:** ✅ In Stock ## Summary > 🚐 Flush like a pro, hit the road with confidence! ## Quick Answers - **What is this?** Flush King™ 45 Degree Reverse Flush Valve Attachment for RV, Camper, Trailer | Clear body shows when water runs clean, anti-siphon backflow preventer, 360 degree swivel bayonet fittings, leak-proof by valterra - **How much does it cost?** ¥15378 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/3250276-flush-king-45-degree-reverse-flush-valve-attachment-for-rv) ## Best For - valterra enthusiasts ## Why This Product - Trusted valterra brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-in-One Tank & Hose Rinse:** Powerful water flow breaks up clogs and cleans tanks, pipes, valves, and hoses in one go - • **Crystal Clear Flow Monitoring:** Transparent construction lets you see when rinse water runs clean - • **Effortless 45° Reverse Flush:** Engineered angle for seamless tank draining and pipe clearing - • **Built-In Anti-Siphon Protection:** Safeguards your fresh water supply from backflow contamination - • **Leak-Proof 360° Swivel Bayonet:** Secure, twist-lock fittings prevent leaks and simplify connections ## Overview The Valterra Flush King™ is a universal-fit, 45-degree angled reverse flush valve attachment designed for RVs, campers, and trailers. Featuring clear ABS construction for visual confirmation of clean water flow, a leak-proof 360-degree swivel bayonet connection, and an anti-siphon valve to protect fresh water supplies, it efficiently breaks up clogs and rinses tanks, pipes, valves, and hoses in a single operation—making maintenance faster and hassle-free for the modern road warrior. ## Description Drain your RV with ease with the Valterra Flush King™ Reverse RV Flush Valve! This sewer hose attachment features bayonet fittings to ensure a leak-proof draining experience. The clear construction allows you to see when the water runs clear. With an anti-siphon valve, you can protect your fresh water supply from possible backflow. The water flow from this valve helps break up plugged pipes tanks and cleans the tank, pipe, valve, and drain hose. With the Valterra Flush King™, you can flush and rinse both your tank and hose in one operation, saving you time so you can get back on the road. Review: Ideal Tool to Have - Perfect product for its purpose; shoot water into tanks and flush until clean. It absolutely works. I have flush valves in my Black Water Tank but using this valve helps to flood and flush your black and Grey tanks. I flushed the black then the Grey. I was concerned by the leaking videos and complaints, I used Teflon tape both valve and hose connections; no leaks, no issues. I'm hoping to upload a video for everyone to see. Cheers..... Review: Easy to hook up and use, does the job! - I've had this for 2 plus weeks and been procrastinating. But today, I am "alone" with no neighbors to my left, right, front or back so my best shot at first time with no witnesses :) . Naturally, no issues. As a solo, with no one inside to check things and not wanting to leave outside, I was cautious. My black tank is 22 gallons so 80% would be 17 but I started with 2, then 4, etc. At 8 gallons, I was getting all clear, but went to 12 and still clear. Similar with gray except I only went to 8 of 34 as it was clear and no suds. I had no issues, but new to me RV. Previous owner said they didn't use toilet, but ??? I use no chem, just lots of water and no paper in toilet. No smells and no issues, but I want to keep it that way. This is far easier than the Sani-flush! ## Features - SEWER TANK RINSER: Breaks up plugged tanks pipes and cleans tank, pipe, valve, drain hose.Fit Type: Universal Fit - FUNCTIONAL: Anti-siphon valve with internal backflow preventer protects the fresh water supply from possible backflow - CLEAR CONSTRUCTION: Clear walls allow you to see when water is running clear - 45 DEGREE ANGLE: Ideal angled shape allows for easy draining - LEAK-PROOF: Tight bayonet attachments with 360-degree swivel and pre-installed fittings ensure a leak-proof connection ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B008O9DV78 | | Best Sellers Rank | #6,544 in Automotive ( See Top 100 in Automotive ) #20 in RV Freshwater Hoses & Fittings | | Brand | Valterra | | Brand Name | Valterra | | Connector Type | Bayonet | | Customer Reviews | 4.7 out of 5 stars 4,579 Reviews | | Global Trade Identification Number | 00019079243508 | | Included Components | Valterra F02-4350 Flush King Reverse RV Flush Valve | | Inlet Connection Type | Barb | | Item Dimensions | 10.75 x 5 x 7.37 inches | | Item Type Name | Valterra F02-4350 Flush King Reverse RV Flush Valve | | Item Weight | 16 ounces | | Item dimensions L x W x H | 10.75 x 5 x 7.37 inches | | Manufacturer | Valterra | | Manufacturer Part Number | F02-4350 | | Manufacturer Warranty Description | 1 year | | Material | ABS | | Material Type | ABS | | Model Number | F02-4350 | | Number of Items | 1 | | Outlet Connection Type | Barb | | Size | (Pack of 1) | | UPC | 019079243508 | | Unit Count | 1 Count | | Valve Type | Flush Valve | ## Images ![Flush King™ 45 Degree Reverse Flush Valve Attachment for RV, Camper, Trailer | Clear body shows when water runs clean, anti-siphon backflow preventer, 360 degree swivel bayonet fittings, leak-proof - Image 1](https://m.media-amazon.com/images/I/71Nj9TTKtoL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: how does it install?** A: P.S. BEFORE you turn the fresh water on, make sure either the black or gray valve on your unit is open after you close the valve on the flush king . If you turn on the fresh water and ALL the valves are closed, the pressure can easily cause the unit to disconnect and break off some of the plastic hooks that hold the flush king in place. **Q: My sewer hose stays connected to the rv. If I buy another sewer hose to connect to black side, can I connect the clear side to the other hose?** A: The clear end - with the four locking 'ears' - is designed to lock onto the four pins on the end of the rigid drain pipe of your RV. If you have a flexible hose attached to the end of the rigid pipe you likely can attach the Reverse RV Flush valve assembly to the end of the hose, but as most hoses have the four ear bayonet mount on only ONE end of the hose, and no connecting fitting on the discharge end of the hose, you'll likely need another four pin hose end like that available in a kit such as the Camco 39543 RV Twist Connect Kit Sewer Fitting from Amazon - http://www.amazon.com/Camco-39543-Twist-Connect-Fitting/dp/B000BQR8TE/ref=sr_1_27?s=automotive&ie=UTF8&qid=1393204739&sr=1-27&keywords=camco - if you wish to install the RV Flush Valve between two flexible hoses. (Not certain why you'd want to go this route... I find it much easier to attach the RV Flush Valve directly to the RV's rigid pipe, then attach flexible hose(s) to it to reach the sewage tank, but I don't leave any of the items attached permanently.) Remember - this is designed to do TWO different tasks. #1 - allows fresh water to flow backwards through the rigid drain pipe, thus allowing water to flow into both the grey and black water tanks, which then are emptied - perhaps more than once. (Many newer RVs have built-in 'sprinkler' type devices inside their holding tanks to allow fresh water to flush the tanks, but for older RVs like mine this Flush Valve does a fantastic job. #2 - fresh water discharged from the holding tanks flush out the valve and drain hose(s). **Q: Is it me or should the hose inlet be facing the black water tank to help flush the tank?** A: All trailers are different angle pipes so it can't be made like that. The design of this is not to spray a water jet up the pipe but to back up fresh water into the tank to flush it out (rather than stand on the peddle of the toilet for 10 minutes). Because of how easy it is to do, I will flush it in the middle of the camping trip if i get bored and keep the smell down that way. Anyway, there are flushers designed to shoot a jet up the black water pipe, but they have very poor reviews because you only get one angle which most likely wont reach the tank because of trailers all being made with different angle pipes. **Q: Would this work with a 2004 170p roadtrek class b camping van rv? i'm a newbie rver. don't quite understand the concept...** A: It appears you have a macerater pump on your unit that pumps the waste out thru a small hose. The f02-4350 is for a different system (gravity) with a three inch hose. It is so you can hook a garden hose to it and add water to the holding tanks to flush out. No it will not work on your system. They do make a sprayer that can be installed to the side of the tank to rinse it out. Hope this helps you. I like the gravity system as there is less to go wrong. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Ideal Tool to Have *by E***A on June 25, 2026* Perfect product for its purpose; shoot water into tanks and flush until clean. It absolutely works. I have flush valves in my Black Water Tank but using this valve helps to flood and flush your black and Grey tanks. I flushed the black then the Grey. I was concerned by the leaking videos and complaints, I used Teflon tape both valve and hose connections; no leaks, no issues. I'm hoping to upload a video for everyone to see. Cheers..... ### ⭐⭐⭐⭐⭐ Easy to hook up and use, does the job! *by E***S on August 9, 2026* I've had this for 2 plus weeks and been procrastinating. But today, I am "alone" with no neighbors to my left, right, front or back so my best shot at first time with no witnesses :) . Naturally, no issues. As a solo, with no one inside to check things and not wanting to leave outside, I was cautious. My black tank is 22 gallons so 80% would be 17 but I started with 2, then 4, etc. At 8 gallons, I was getting all clear, but went to 12 and still clear. Similar with gray except I only went to 8 of 34 as it was clear and no suds. I had no issues, but new to me RV. Previous owner said they didn't use toilet, but ??? I use no chem, just lots of water and no paper in toilet. No smells and no issues, but I want to keep it that way. This is far easier than the Sani-flush! ### ⭐⭐⭐⭐⭐ CLEAN AND EZ *by J***D on August 12, 2026* THIS IS A MUST HAVE FOR ANY RV'ER. GOT A 10FT WATER HOSE I LEAVE ON IT, ALONG WITH SEW HOSE! SO FAST SO CLEAN SOOOOO NICE!!! THE CLEAR WINDOW MAKE IT EZ TO SEE WHAT YOU'VE BEEN MISSING. YOU'LL BE HAPPY YOU GOT IT. OTHER CAMPERS WILL ASK YOU ALL ABOUT IT SAYING THEY HAVE TO GOT ONE. ## Frequently Bought Together - Valterra Flush King™ 45 Degree Reverse Flush Valve Attachment for RV, Camper, Trailer - Save A Drop Water Flow Meter | Measure Gallon Usage from an Outdoor Garden Hose | Helps Conserve Water - Calgon Ageless Bath Series Renewing Pearls, 16 oz. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/3250276-flush-king-45-degree-reverse-flush-valve-attachment-for-rv](https://www.desertcart.jp/products/3250276-flush-king-45-degree-reverse-flush-valve-attachment-for-rv) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-19*