I decided to install a built in gray water flush system on our tank similar to what is used on our black water tank. Prior there was no way to truly get a good cleaning in the gray water tank before I did this modification, you could only drain the tank and that's it.

What's different about my modification compared to how others do it is you can hook your water hose to one water inlet on the side of the RV and be able to flush both the black & gray tanks separately using a 3 way ball valve located near your waste dump valves.

This modification is easy and quick to do as you can see in the video.

NOTE: If you don't have any type of way to flush either of your Black or Gray tanks you might consider installing this system on both your tanks to get a better cleaning.

Here's a link to my video on how I replaced my black and gray tank level probes    • Horst Miracle Probes  My Travel Trai...  

Note: Products I used and links to them are provided below.

Check out my other YouTube videos by clicking this link
   / michaelbracewellthetraveltrailerguy  

Michael Bracewell "The Travel Trailer Guy" is a Amazon Associate, I earn a small commission from qualifying Amazon purchases by you using the Amazon links below at no additional cost to you. Thank you

12 Pack 3/4 Inch Stainless Steel Cable Clamp, Rubber Cushioned Insulated Clamp
https://amzn.to/3FFDQMB

ParBarb Nylon Male Connector Fitting, 1/2" Hose Barb x 1/2" Male NPT, White
https://amzn.to/3lzu0Ux

Barb Nylon Union Elbow Fitting, 90 Degree Angle, 1/2" Hose Barb x 1/2" Hose Barb, White
https://amzn.to/3DEB2xv

10 Piece Hose Clamp Box (Micro Size 6), silver
https://amzn.to/2YJZoqb

Metals Brass Garden Hose Fitting, Connector, 1/2" Barb x 3/4" Male Hose
https://amzn.to/3ACwTbc

3 Way (LPort) 1/2'' Female Valve Brass Ball Valve AntiRust Forged Brass Valve Fitting with Lever Handle (Note: I could not find this valve in local hardware stores)
https://amzn.to/3BAaz3y

Rigid Pipe Strap Clamp Hanger, 2 Holes, Galvanized or PVC Pipes, IMC Conduit (10, 3/4 Inch)
https://amzn.to/3iYegZp

Valterra A010169LFVP Black Plastic LeadFree Flange Water Inlet
https://amzn.to/3lvcOPT

Rhino Blaster Sewer Tank Rinser
https://amzn.to/3mGbAR6

Valterra A70 NoFuss Flush with Check Valve
https://amzn.to/3FGrhRa

Valterra A71 NoFuss Flush Accessory Kit
https://amzn.to/3au7qGD

1/2" ID x 5/8" OD High Pressure Braided PVC Tubing, Heavy Duty Clear PVC Flexible Tube Vinyl Hose Water Oil (10Ft length)
https://amzn.to/3DEGh09

Lexel Adhesive Caulk, 10.5Ounce
https://amzn.to/3lA8i2x

1 inch Hole Saw with Arbor
https://amzn.to/3DDfp0f

DEWALT Right Angle Attachment, Impact Ready
https://amzn.to/2YNnXTI

Right Angle Drill 105 Degree Right Angle Screwdriver set Drill Hex Bit Socket Adapter,360°Rotatable 3Pcs 1/4" 3/8" 1/2" CrV Hex Shank Impact Grade Driver Socket Adapter
https://amzn.to/3BBSfaa

Camco 40126 Tornado Rotary Tank Rinser with Hose (I did not use these but its another option)
https://amzn.to/3ABw6as
https://amzn.to/3lCk1hj

We use this to clean our toilet and to put in our black tank:
TST UltraConcentrate Orange Scent RV Toilet Treatment
https://amzn.to/3qcULjr

DISCLAIMER
The opinions expressed in our videos are our own or from a contributor. Before taking on any project or making a large purchase, we recommend you do your own research and consult a professional for advice. We are NOT liable for any damage to your RV or injury incurred as a result of following our tips, advice or instructions. We are not RV professionals or certified technicians. We are simply RV owners who work on our own RVs and have a desire to share what we learn with others. Be responsible and know your limits.