Skip to main content ↑ ↓
Topic: Black and Gray tank sensor? (Read 548 times) previous topic - next topic

Black and Gray tank sensor?

Can anyone tell me what these are....the white fittings in the tank outflow elbows with the 3 wires?  There's one on each tank?  2001 U320...looks unmolested/original.  I'm stumped.

Just discovered the fiddly bits this week whilst installing Tornado tank flushers.  Lots of gymnastics (and cussing) while working around/underneath/behind the slide room support truss.
2001 4010 U320 build #5865 "Bluto-d-Bus" since 09/18
2006 Honda Element ESP Toad
Full timing since 2016 in Western MT
Copilot: Sitka
1975 GMC 260 Avion: sold

Re: Black and Gray tank sensor?

Reply #1 –
They look like sensors and may tell you if tanks are empty as they are before the valve's. I have electronic valve gates with sensors to let you know when they are open or closed but have not seen the ones you have before.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Black and Gray tank sensor?

Reply #2 –
Agree with John - probably some type of hydrostatic pressure/level sensors.

Where is the display panel for your tank levels?  Do you have the OEM factory system, or a after-market system?

https://www.youtube.com/watch?v=T2OPoEod_jM&vl=en
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Black and Gray tank sensor?

Reply #3 –
They are the sensors for your black and gray tanks. You also should have one for the fresh water tank, on the other side of coach where your water pump is. I've had success in cleaning them when they weren't reading correctly. They areOEM and believe FOT parts still carry them.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Black and Gray tank sensor?

Reply #4 –
Thanks for clearing this up guys.  Had no idea hydrostatic sensors were used...always thought it was capacitance tapes in there.  And sure enough, in my manual under Audit diagram it shows the sensors clearly.  I'm glad FOT has the parts if one of em craters.  My Javelina tank monitor portion is still working...knock on wood...but I've bypassed the camera and tossed the roof compass unit.  Thanks again.
2001 4010 U320 build #5865 "Bluto-d-Bus" since 09/18
2006 Honda Element ESP Toad
Full timing since 2016 in Western MT
Copilot: Sitka
1975 GMC 260 Avion: sold

Re: Black and Gray tank sensor?

Reply #5 –
Quote from: rbark –
They are the sensors for your black and gray tanks. You also should have one for the fresh water tank, on the other side of coach where your water pump is. I've had success in cleaning them when they weren't reading correctly. They areOEM and believe FOT parts still carry them.
Thanks, Now I know where these are. FOT upgraded our system to a "Sensatank RV100" but has not been reading well (go figure) I'll look into replacement sensors.
Prior 2003 U295  40ft  400Hp -Sold
2020 F350 Tremor - Sold
2021 Bundutec Roadrunner - Sold
2017 Airstream Classic - Sold that POS
2017 F250 - Sold
2019 Sprinter Van - Sold
2022 Winnebago Revel 4x4


Army Airborne Vet.