7 Reasons Truck Owners Are Flushing Their Frames Before Winter
By the BT crew · Springville, Utah · Updated November 2026
You wash your truck. You even pay for the undercarriage spray. Then you run a hose through the frame for the first time, and the water comes out brown.
Here is why truck owners are flushing their frames before the salt trucks roll.
1.The water comes out brown
Hook up the hose and watch what pours out of the drain holes. Mud. Sand. Road salt. It has been sitting inside your frame since last winter.
Most guys do not believe it until they see it.
2.Your frame is hollow
The rails under your truck are steel boxes with holes in them. Everything the road throws up goes in through those holes and stays there.
Salt sitting on bare steel is how a frame rots from the inside out. You will not see it until it is bad.
3.The car wash only hits the outside
An undercarriage spray rinses what it can reach. It can not get inside a closed rail. The outside looks clean. The inside is still packed.
4.This goes in through the drain holes
The BT flusher sprays six ways at once. It shoots through the factory drain holes and washes down the inside of the rail.
Soap goes in the built-in dispenser, so you are flushing with more than water.
Get the kit — $37.50Black Friday sale · normally $59.99
5.Magnets hold it. You just move it down the frame.
Eight magnets lock it onto the steel. No drilling. No tools. It screws onto a standard 3/4 inch garden hose.
Snap it on, turn on the water, and work your way down the frame. It fits every truck, Jeep, SUV and off-road rig.
6.It is $37.50, not $100
Other frame flushers run $100 and up. Ours is normally $59.99.
For Black Friday it is $37.50. That is over 30% off, for a limited time.
7.Use it for 30 days. Send it back if you want.
Run it on your truck. If you are not happy, send it back within 30 days for a full refund, even used.
It ships from our shop in Springville, Utah, packed by our own crew. 487 truck owners rate it 4.9 out of 5.
BT Chassis Flushing Kit
Over 30% off · limited time
Get the kit — $37.5030-day money back, even used · Ships from Springville, Utah
How you use it
- Snap the magnetic mount onto your frame rail.
- Turn on the hose. The jets flush soap and water through the inside of the rail.
- Work it down the frame. Once after winter, once in fall.
Before you ask
Yes. It fits every truck, Jeep, SUV and off-road rig. The magnets grab any steel frame.
Any standard 3/4 inch garden hose. No pressure washer.
Once after winter and once in fall.
Send it back within 30 days for a full refund, even used.
Every kit ships from Springville, Utah. Once shipped, it arrives in 3 to 5 days.
Do not let this winter’s salt sit on top of last winter’s
Your frame is hollow. Flush it out, and see what comes out for yourself.
Get the kit — $37.50Black Friday sale · over 30% off · limited time