When camped at camp grounds do you

[blue_trawler]

Leave your gray or black water valve open? I always leave black tank closed and grey water open until we are going to leave. Meaning a day or two in the grey water tank to flush out after draining black water tank.

Thanks

Bruce

[Old-Biscuit]

Closed.....have to go out an dump black so only going to make one trip.

Don't see reason for leaving grey open.....have to remember to close it in time so grey can build up then go back out to dump it when dumping black.

One trip...once a week. Got other things to do then be messing around with dump valves/waste tanks.

[RAS43]

Lantley wrote:
Both closed until they are full enough to dump. Leaving valves open exposes tanks to fumes critters, and insects which may live in sewer lines.

X2-from a 30+ year RV'er. The extra grey water will flush out the hose better also.

[Racine96]

Lantley wrote:

Both closed until they are full enough to dump. Leaving valves open exposes tanks to fumes critters, and insects which may live in sewer lines.

I do the same.

[Acampingwewillg]

Closed until needed to dump....both.

[RCMAN46]

Lantley wrote:
Both closed until they are full enough to dump. Leaving valves open exposes tanks to fumes critters, and insects which may live in sewer lines.

X2

I have found a couple sewer system under a slight pressure. That means the sewer system will vent via your holding tanks.

Once I noticed water coming out of the neighbors trailer. There was a major sewer problem where the sewer was backing up into trailers that had their valves open.
I was sure glad mine was closed!

[Bird_Freak]

After having a problem with sewer flies before all my valves are closed until time to dump.

[Home_Skillet]

blue trawler wrote:
Another thing I do, is fill the black tank full ( 50 gallons) with water after dumping and then drain again!

Bruce

I think that would be wasting the camp ground's water.:E

I leave my black tank valve closed. There's not enough water in the toilet to flush the waste all the way down the sewer hose.

[2stepn]

sch911 wrote:
I keep the gray open until just before the black needs to be dumped. Then allow the gray to fill some and use that to wash the hose out after dumping the black. Our black requires dumping about twice a week.

This is the way I do it as well.

[blue_trawler]

Another thing I do, is fill the black tank full ( 50 gallons) with water after dumping and then drain again! May be over kill but who knows!

Bruce

[rockhillmanor]

path1 wrote:
(Obviously your talking dumping with hook ups. Just wanted to add that in case thread turns into a dumping post with some peoples fascination with poop)

I leave both of them closed until I dump. When we used to leave gray valve open but every so often depending on the site we would get a few odors up thru shower drain. To avoid that I keep both valves closed and give the gray tank handle a pull every morning. The black tank valve we always keep closed until we dump.

Ditto X2.
I never leave any tanks open leading into a sewer/septic hookup. Leaving the gray open just lets all the sewer gas go right into your tank. And as mentioned above its best left closed to fill and dump after you have dumped your black to flush y pipe and hose.

[Scott_85]

I kelp the black closed and the gray stays open until the after the last night showers and then it gets closed. The day that we leave I spend about an hour flushing the black and after the morning showers and cleaning the camper the gray tanks have become full so after the black tank is running clear water I close that value and dump the gray. After the gray I clean the sewer hose and everything is stored in a tote till next time.

[avvidclif1]

Black closed and both grays open until day of departure. When ready to leave or needing to dump black tank I dump the black, close and fill tank for 4 min (figured for my tank) using San T Flush. Empty and repeat as needed. Usually 2-3 times will show clear water thru the clear elbow. Dump Gray tanks. Flush slinky with gray water hose.

[DutchmenSport]

All stay closed. Black and gray are joined together. So I use a 3rd sleeve, knife blade type valve with a 6 inch clear section. Then I dump the black first, close off the 3rd valve, and then let the gray back flush into the black for about 10 seconds, then close off the gray and open the 3 rd valve again. I repeat this at least twice and it pulls a LOT more out of the black tank. I then close off the black and let the gray wash the sewer hose. I then connect to the galley tank and let it drain last. This cleans the hose pretty good.

If you've never tried the back-flush process between your black and gray, try it. You'll be amazed how much more comes out when you back flush like that, and ... it does not take extra water to clean the tank out.

[Bull_Rider]

Both closed until ready to dump, and slinky stowed until ready to dump. Just the way we've always done it.

[J_R2]

Lantley wrote:
Both closed until they are full enough to dump. Leaving valves open exposes tanks to fumes critters, and insects which may live in sewer lines.

ditto. food particals ect, will also accumulate at bottom of tank.