Grey Tank and Galley Tank

alboy wrote:
Just for info sake your black tank sprayer has a check valve at the inlet that can fail and the tank will leak as it gets full.

Black tank would have to get REALLY FULL....so full that level would have to be starting to go up vent pipe

You see there is this 'anti-siphon vacuum device' installed HIGH up on that flush system to prevent/stop any backflow from tank.

If it actually did occur (high level..go thru spray nozzle then up 2' to anti-siphon vacuum device) it would leak inside RV where 'device is located'---typically under bathroom sink or even in a closet

azjeffh wrote:

Old-Biscuit wrote:

azjeffh wrote:
On our previous 5er (2005 HR Savoy), the galley had an overflow but the shower did not (separate tanks). Our current 5er doesn't have one.

Check to see if you have a vent near your galley. Ours was on the side of the trailer.

Are you confusing an 'Air Admittance Valve' for an overflow ??

Perhaps it was an 'Air Admittance' of some sort. However it was vented from the outside. I can also say if the galley was over filled, it would release water. After 11.5 years and more than 140 trips, I do feel that I knew the trailer well.

Picture attached shows the location of the vent.

THAT would be 'vent' for galley tank and sink drain line due to microwave exterior venting ----so no roof vent for galley.
And I would imagine it would dump water when galley tank was OVERFULL but that was NOT it's purpose.

alboy wrote:
Just for info sake your black tank sprayer has a check valve at the inlet that can fail and the tank will leak as it gets full.

Generally, that would be on the street (driver's) side of the rig, not where azjeffh indicated...a$$uming that's what you were referring to. IMO, it's a real strange place for =any= plumbing vent, though. :-)

Lyle

Dtank wrote:

Old-Biscuit wrote:

azjeffh wrote:
On our previous 5er (2005 HR Savoy), the galley had an overflow but the shower did not (separate tanks). Our current 5er doesn't have one.

Check to see if you have a vent near your galley. Ours was on the side of the trailer.

Are you confusing an 'Air Admittance Valve' for an overflow ??

Can't imagine ANY RV Mfg. installing an overflow in a waste tank and accepting the EPA Liability that would go with that install.
Especially galley tank with food particles, greases/oils etc.

It's a Bio-Hazard.

The "liability" will (also) fall to the RV owner the first time he/she accidentally overflows sewage or gray water in a campground which has state, county, or city haz-mat regulations and an enforcement agency (like the local Fire Dept Haz-Mat unit).

Depending on the amount (even small) - the RV owner may be held responsible for mitigation by a certified private disposal company at his/her expense - and a citation.

Some locations will be out-of-sight and slip under the radar....
others -like the city beach parking lot used as a campground during the off-season- will be very obvious.

Once the enforcement agency is involved - the RV owner is between a serious rock and a hard spot.

Frankly, I think it would be hard to prove that dumping a grey tank while boondocking is any worse that wandering off behind a bush and taking a leak or dump. Out here in the West, the forests NEED the water and a bit of extra nutrients from the grey tank can't be at all bad. Now, dumping in a CG or on the street, that's a whole 'nother ball game, for sure. Black tanks; verboten.

Lyle

Just for info sake your black tank sprayer has a check valve at the inlet that can fail and the tank will leak as it gets full.

Old-Biscuit wrote:

azjeffh wrote:
On our previous 5er (2005 HR Savoy), the galley had an overflow but the shower did not (separate tanks). Our current 5er doesn't have one.

Check to see if you have a vent near your galley. Ours was on the side of the trailer.

Are you confusing an 'Air Admittance Valve' for an overflow ??

Perhaps it was an 'Air Admittance' of some sort. However it was vented from the outside. I can also say if the galley was over filled, it would release water. After 11.5 years and more than 140 trips, I do feel that I knew the trailer well.

Picture attached shows the location of the vent.

Old-Biscuit wrote:

azjeffh wrote:
On our previous 5er (2005 HR Savoy), the galley had an overflow but the shower did not (separate tanks). Our current 5er doesn't have one.

Check to see if you have a vent near your galley. Ours was on the side of the trailer.

Are you confusing an 'Air Admittance Valve' for an overflow ??

Can't imagine ANY RV Mfg. installing an overflow in a waste tank and accepting the EPA Liability that would go with that install.
Especially galley tank with food particles, greases/oils etc.

It's a Bio-Hazard.

The "liability" will (also) fall to the RV owner the first time he/she accidentally overflows sewage or gray water in a campground which has state, county, or city haz-mat regulations and an enforcement agency (like the local Fire Dept Haz-Mat unit).

Depending on the amount (even small) - the RV owner may be held responsible for mitigation by a certified private disposal company at his/her expense - and a citation.

Some locations will be out-of-sight and slip under the radar....
others -like the city beach parking lot used as a campground during the off-season- will be very obvious.

Once the enforcement agency is involved - the RV owner is between a serious rock and a hard spot.

azjeffh wrote:
On our previous 5er (2005 HR Savoy), the galley had an overflow but the shower did not (separate tanks). Our current 5er doesn't have one.

Check to see if you have a vent near your galley. Ours was on the side of the trailer.

Are you confusing an 'Air Admittance Valve' for an overflow ??

Can't imagine ANY RV Mfg. installing an overflow in a waste tank and accepting the EPA Liability that would go with that install.
Especially galley tank with food particles, greases/oils etc.

On our previous 5er (2005 HR Savoy), the galley had an overflow but the shower did not (separate tanks). Our current 5er doesn't have one.

Check to see if you have a vent near your galley. Ours was on the side of the trailer.

NO waste tank be it black of grey (galley is border line black/grey) have overflows.

One would not want overflows spewing waste water out onto ground.


Drain lines from sinks/showers go into top of tank......2 methods used
Pipe is glued to fitting glued into tank'
OR
Pipe goes thru a grommet that is installed in cutout of tank

Any leaking from a waste tank indicates a cracked/broken line/tank or coming out via grommet