I have a Crossroads Cruiser CF30BH. After a long weekend of boondocking, the forward gray tank (1 of 2) was quite full. When I pulled the handle to drain it, I got the familiar rush of water sound as it drained. Then is slowly tapered off, and I thought it was empty. When I closed the valve, I could hear a glug-glug-glug sound as it drew in air thru the valve, and could tell there was still a lot of water in it. After a couple minutes, I repeated this process with the same results.
Are gray tanks not vented? Is this a unique situation to my 5er? What can I do so it drains fast until empty? It took about 15 min to empty. (luckily no one waiting for the dump station)
Chances are you do have a vent pipe and maybe some little critters decided to build themselves a home in the pipe. I'd climb up on top, remove the vent cap and clean things out. You also might want to go to the crossroads forum and check with the friendly folks over there.
2001 F250 7.3L PSD, air lifts, 4" pipes, 6637 mod, Husky sliderhitch
2005 Crossroads Cruiser CF29CK (with all the goodies)
If it were me, I'd do the following. Check and see if you have round vent caps on the roof. The caps should be about the size of a hockey puck (maybe a little larger)and should be just shoved down over the vent pipes. Should be at least 2, one for grey and one for black. Positioning of the roof vents may dictate which is which. Fill the grey tank full. The less air in the tank, the better. Hit the roof and pull the caps off. Have someone open the grey drain. Yeah, it's gonna drain in the yard, but it's only soapy water. Place your hand over the vents and see if you can tell if one is pulling air. You may be able to hear it. If not, you either have a blockage in the vent (might be able to see down them with a flashlight) or a blockage in the grey tank itself.
If you or see or suspect vent blockage, then disconnect the drain trap under the sink or bathroom sink and see if the water drains a little better. If not, I would almost suspect drain blockage.
Sometimes when the hole is cut for the drain nipple, the piece cut out is "lost" in the tank. When the water runs out, especially when the level gets low, that piece will settle over the hole and block the drain. I would guess the only way to see and/or remove it would be to disconnect the drain at the tank and try to look up of feel up inside. I would expect the nipple to be short enough to at least get a finger up inside.
Mike and Sue
2006 Silverado 2500 Long bed
2005 Nash 27F
3 kids - 2 dogs & 2 grandsons (23 mos and 20 mos) and a B E A utiful granddaughter, now 6 mos old.
2 dogs - Cocoa, Copper
If you closed the drane valve before the tank was empty and you still had water in the drane hose it will go glug glug, you have closed the vent in the gray tank so your hose has no vent now unless you open the other tank valve, and if it was open then I have to agree there is a blockage in the second gray tank vent.
Don & Georgia
AKA: Trailer Trash 2
Real trucks don't have spark plugs.
1996 Ford F-350,Clydesdale, 7.3 Turbo W/Banks
Pulling a Super Fine Montana 2980RL
The vent stacks for the gray tanks are usually located under the sinks. Check in your cabinets and see if they are there and functioning as designed.
Pickle at Pickldom.
Wife, Deb; Daughters: Brenna(13), Alysson(12)
Dog: Chocolate Chip (English Springer Spaniel) "Okay, in or out, but don't keep pawing at the door!"
03' Dodge, 2500, Long Bed, 4x4, HO Cummins Diesel.
2004 29BHBP Wildcat by Forest River.
Pickle2 wrote: The vent stacks for the gray tanks are usually located under the sinks. Check in your cabinets and see if they are there and functioning as designed.
That is where the vent is for our kitchen sink. I found it there when I was adding some shelving under it.
* This post was
edited 06/18/08 10:43am by Hamops *
Helen & George VE3INB and Max (Bichon Frise) 06 Silverado LT 2500HD D/A 2006 Crossroads Cruiser CF30SK
Prodigy Brake Controller
16K Reese Slider with a Bedsaver
Pickle2 wrote: The vent stacks for the gray tanks are usually located under the sinks. Check in your cabinets and see if they are there and functioning as designed.
The under sink vent is a one way valve and lets in air to prevent sucking the water out of the trap as the water drains down the pipe. The tank still has to have a roof vent to let air out of the tank as water enters.
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