Click to enlarge, hover over image to zoom

Flush King

(163 Reviews) Add A Review
Catalog Item # 20522
This Item is In-Stock and Ready to Ship
Internet SALE 
$49.99 SAVE $17.00

Reg $66.99

Have A Question About This Product?
1 Question | 1 Answer
Read All Q&A | Ask a Question | Answer a Question

Like this product?
Share it!

Add Camping World item to Wish List


Flush King Reverse RV flush valve provides you with the quickest and most effective way to fill, rinse and remove residue from your black or gray holding tanks.
Flush King rapidly refills the holding tank no matter what height of tank or angles in plumbing. Unique design eliminates messy wands and hoses inside the RV by allowing you to reverse flush your tanks from the outside. Powerful performance removes clogs in drain pipes and improves sensor performance for more accurate readings. Four locking hooks provide a tighter seal to guard against leakage. For your convenience, the handle swivels 360 degrees to make hook up and operation easier. The innovative clear barrel allows you to see when the tanks are completely clean of residue, so there is no guess work.

Flush King fits all Trailers and 5th Wheels and most Motor Homes and is not a permanent attachment. Twist on and off, how easy does it get! Connect the Flush King to your RV's sewer pipe and your sewer hose to the valve. Now you are ready to dump, rinse or clean your tanks in one easy operation! When you are finished, simply remove the Flush King and store it away.


  • Removes remaining residue in the gray and black tank after dumping
  • Improves sensor performance
  • Eliminates messy wands and hoses inside the RV
  • Works on Motorhomes, Trailers and 5th Wheel RVs
  • Clear barrel allows you to see the cleaning in action
  • Sanitary and efficient, no other product on the market does a complete job like the Flush King
  • Fills tanks at any height or angle of plumbing
  • Backflow preventer included
  • Non permanent attachment
  • Easy to use and connect

Technical Specs

Tech Specs

Weight: 2.7 lbs.

Manufacturer: Valterra Products Llc

Mfg Part #: FK-01

Related Items

Items Selected: (0)


Flush King: Customer Reviews

Camper's Choice Rating

(5 Based on 163 Reviews)

Reviewed by 163 customers



0 out of 0 people found this review helpful.
June 24, 2014
I was wondering about making my own flush system. Being an ex submariner, I know how important it is to have a system to flush the tanks and the system. Heavy waste will cause issues and you will need to back flush and keep the tanks clean to reduce issues and smells. This thing is well worth it. I am glad I found it and purchased it. Simple to use and it works like a champ and it does matter and saves time and keeps the hoses and the tanks clean. Buy it! Henry
Was this review helpful? Yes / No

Works great!

8 out of 14 people found this review helpful.
June 12, 2010
After reading all the reviews about this product thought I would give it a try. Been using it for months now and found this product really makes a difference. You do need to be cautious when putting it on. Just like anything made of plastic you can break the teeth off. My brother saw how well it worked and got one for him. Easy to use. I allow plenty of time in the morning before leaving campground to clean tank out good. Don't want to be rude at the dump station. No problems with sensors showing partially full.
Was this review helpful? Yes / No

Q & A

Product Question & Answer

1 questions : 1 answers
Expand All
How does this attach to the sewer lines on the trailer?
1 answer(s)

Stay Connected
See Camping World Reviews at