Reply
 
Thread Tools Display Modes
Old 06-27-2019, 02:02 PM   #1
Junior Member
 
Join Date: Dec 2018
Posts: 20
Leaking gray water tank

2017 Coachman Pursuit, 27KB.
Does anyone know if there is an 'overflow' opening of some sort, on the gray tank ? When our indicator says our tank is +/- 2 thirds full, it starts leaking into the lower compartment on the passenger side. Thanks for any thoughts.
__________________

the thing is offline   Reply With Quote
Old 06-27-2019, 02:07 PM   #2
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 11,916
I have personally never seen a gray tank overflow in 40+ years..

I have seen tanks where the vent pipe wasn't sealed at the tank and caused a leak when full.
__________________

__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=83
5picker is offline   Reply With Quote
Old 06-27-2019, 02:14 PM   #3
Senior Member
 
Join Date: Jun 2018
Posts: 165
I suspect that the indicator isn’t working properly and the tank is full.

Has it ever showed full? If it as never indicated full there is probably a wiring issue with that individual sensor.

Bob
__________________
2018 Rockwood Ultra Lite 2902WS Travel Trailer
HappyTrav is offline   Reply With Quote
Old 06-27-2019, 02:17 PM   #4
Junior Member
 
Join Date: Dec 2018
Posts: 20
Thank you. Maybe that's where I'll try to start investigating. There's not much room between the top of the tank and the underside of the floor but I'll see what I can find.
the thing is offline   Reply With Quote
Old 06-27-2019, 02:25 PM   #5
Junior Member
 
Join Date: Dec 2018
Posts: 20
Thanks Bob. It seems like it starts leaking when the indicator is flickering between two thirds and full. I'm under the impression that the gray tank needs to be full before dumping the black tank. Maybe I need to pay more attention to how full the gray tank is.
the thing is offline   Reply With Quote
Old 06-27-2019, 02:30 PM   #6
Senior Member
 
Join Date: Jun 2018
Posts: 165
Quote:
Originally Posted by the thing View Post
Thank you. Maybe that's where I'll try to start investigating. There's not much room between the top of the tank and the underside of the floor but I'll see what I can find.
There are three sensors in the side of the tank. One for 1/3, 2/3, and full. When the tank is full it will overflow in the shower as it is the lowest point.

Before I started taking anything apart I would fill the grey tank and see if it ever shows full.

Bob
HappyTrav is offline   Reply With Quote
Old 06-27-2019, 02:33 PM   #7
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 11,916
Quote:
Originally Posted by the thing View Post
Thanks Bob. It seems like it starts leaking when the indicator is flickering between two thirds and full. I'm under the impression that the gray tank needs to be full before dumping the black tank. Maybe I need to pay more attention to how full the gray tank is.
No, the grey tank doesn't need to be full before dumping the black tank.

Most recommend there be 'some' in the grey tank to use to flush the hose and connections after dumping the black tank but it certainly does not need to be full.

Keep in mind the 2/3 sensor will show 2/3 right up to the moment the tank gets full. There may not be anything wrong with your sensors.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=83
5picker is offline   Reply With Quote
Old 06-27-2019, 02:35 PM   #8
Senior Member
 
Join Date: Jun 2018
Posts: 165
Quote:
Originally Posted by the thing View Post
Thanks Bob. It seems like it starts leaking when the indicator is flickering between two thirds and full. I'm under the impression that the gray tank needs to be full before dumping the black tank. Maybe I need to pay more attention to how full the gray tank is.
It just sounds like the sensor is off. Iím general they are notoriously inaccurate.


It doesnít need to be full. You just want to be able to rinse out your sewer hose after dumping the black tank.

I leave my grey dump valve open until the night before we leave. Then I close it and the morning showers are sufficient to rinse the sewer hose and fittings
HappyTrav is offline   Reply With Quote
Old 06-28-2019, 04:57 PM   #9
Senior Member
 
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 2,676
A bit more...

Quote:
Originally Posted by HappyTrav View Post
It just sounds like the sensor is off. Iím general they are notoriously inaccurate.
You can define it a little more closely than that.

One common source of error is level of the RV. These sensors are mounted in a wall of the tank. If the RV is parked with that side of the tank down, the tank will indicate fuller than it is. If it's the high side, it will indicate lower. It is possible to make an indicator which is independent of tank orientation, but the sensor has to be mounted in the center (side-to-side and fore-and-aft) of the tank. Nobody does this.

The indicator might indicate that the tank is emptier than it is, if a wire from one of the sensors fell off. This is rare, and if it were any but the highest sensor, there would only be a gap in measurements; i.e., jumping from botto two lights on to the bottom two plus the top one, with third light out.

The notorious problem is indicating that the tank is fuller than it is. The sensors are measuring the low current conducted by waste water when they are submerged by it. If damp paper or humid salty waste is on the sensor, the same current could flow, even if not submerged.

Larry
Larry-NC is offline   Reply With Quote
Old 06-28-2019, 09:50 PM   #10
Jack of All Trades
 
RJHuser's Avatar
 
Join Date: Oct 2010
Location: Williston, Florida
Posts: 313
Yíall need to read the OPís original comment again!
He says the water is leaking into the lower compartment, not out of the shower drain.
There is NO overflow on a gray (or black) tank. These tanks have an inlet connection, a vent connection, and a discharge connection.
If water is coming out of anywhere except the discharge connection, there is a BIG problem. A cracked tank or a inlet or vent connection leaking/not connected.
There have been several reports of the vent or inlet pipe has pulled out of the tank (itís generally a slip joint).
You, or your dealer, is going to have pull the bottom cover and inspect where the water is coming from. The tank may have be dropped to find/repair the problem.

Rick
__________________
Rick & Debbie; Brandy Schnoodle & Bucky (Dexter & Fritz R.I.P.) the Doxie "Kids"
2015 Jayco Pinnacle 36RSQS 5'er
2018 GMC Sierra Denali 3500HD, 6.6L Diesel Dually; B&W Companion 5'er hitch
ScanGauge, TST 507 TPMS
RJHuser is offline   Reply With Quote
Old 06-29-2019, 08:00 AM   #11
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 11,916
Quote:
Originally Posted by RJHuser View Post
Yíall need to read the OPís original comment again!
He says the water is leaking into the lower compartment, not out of the shower drain.
There is NO overflow on a gray (or black) tank.
These tanks have an inlet connection, a vent connection, and a discharge connection.
If water is coming out of anywhere except the discharge connection, there is a BIG problem. A cracked tank or a inlet or vent connection leaking/not connected.
There have been several reports of the vent or inlet pipe has pulled out of the tank (itís generally a slip joint).
You, or your dealer, is going to have pull the bottom cover and inspect where the water is coming from. The tank may have be dropped to find/repair the problem.

Rick
I guess you didn't read my post # 2.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=83
5picker is offline   Reply With Quote
Old 06-29-2019, 11:49 PM   #12
Jack of All Trades
 
RJHuser's Avatar
 
Join Date: Oct 2010
Location: Williston, Florida
Posts: 313
Quote:
Originally Posted by 5picker View Post
I guess you didn't read my post # 2.
No, I read it, I was replying the OP in post #1.

Rick
__________________
Rick & Debbie; Brandy Schnoodle & Bucky (Dexter & Fritz R.I.P.) the Doxie "Kids"
2015 Jayco Pinnacle 36RSQS 5'er
2018 GMC Sierra Denali 3500HD, 6.6L Diesel Dually; B&W Companion 5'er hitch
ScanGauge, TST 507 TPMS
RJHuser is offline   Reply With Quote
Old 07-04-2019, 04:12 PM   #13
Senior Member
 
Witch Doctor's Avatar
 
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 10,143
I have a coachmen, donít trust the lights, the best way has been posted. If your tank is full and your shower or sink is on it , it will not drain, you can tell if they hold water the shower is best being lower. If itís filling up your vent pipe might be the problem at the collar. When you see it leaking run water in the shower and see if it drains if not it is full and coming out the vent collar. Donít trust the idiot lights. It happened to mind but I learned how to deal with it. Hope this helps
__________________

__________________
Coachmen M/H
Concord
2018 / 300 DSC

Witch Doctor is online now   Reply With Quote
Reply

Tags
leak, tank, water, water tank

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 03:24 PM.


×