Gray water tank not draining

[Pau de Leon]

looking for a safe product to us in a gray water to unplug it paul

[mhbell]

Originally Posted by Pau de Leon

looking for a safe product to us in a gray water to unplug it paul

Are you sure it is the gray tank and not the black? if in fact it is the gray tank is the valve not opening? Please be more specific about the problem. There are several safe products to help clean all of the tanks. Include the make and model of your RV.
Mel

[Old-Biscuit]

1 1/2" drain line is tough to plug up on a grey tank.
Weight and volume of water will push most things right on out

Grey tank not draining could be drain valve slide not opening ---handle moves but slide doesn't
OR cut out disc got left in tank during install/assembly and can get jammed in tank out

If issue is kitchen sink not draining then check 'p' traps ...they can get clogged


What makes you think grey tank is plugged/not draining?
Symptoms ????

[LarrytheBear]

Could be a plugged vent for the gray tank. It may drain if you leave the black valve open when you open the gray valve so that it vents through the black tank.

[windsorbill]

Originally Posted by Pau de Leon

looking for a safe product to us in a gray water to unplug it paul

There should not be anything in a grey tank to clog it. As mentioned, it might be a plastic plug or other foreign object that dropped in when mfg was drilling holes for vents or sensors.

Please give us a little more info so we can help diagnosis your problem/solution

[Pau de Leon]

Originally Posted by Pau de Leon

looking for a safe product to us in a gray water to unplug it paul

times I would dump it before it would start off slow and black then would dump Think it is a greaese build up and looking a product to clean tank Paul

[LarrytheBear]

If it's grease then hot water with a cup of good dish detergent, such as Dawn, go for a ride and then dump.

[TANDD]

We had an issue with the grey tank not draining; bought a new valve. When changing the valve, I found a clog of COFFEE GROUNDS right behind the valve, probably had other stuff to help coagulate. We have never actually dumped the grounds in the sink, but apparently rinsed too much out of the filter etc. over the week or so prior to attempting dump.

[awol50]

Originally Posted by Pau de Leon

looking for a safe product to us in a gray water to unplug it paul

If you think it is just grease buildup, and you are at your house and have a decent place to drain the water like onto your yard or into a storm sewer drain, here is what I would do.
Run a garden hose directly from your house hot water heater into the shower stall and turn on full blast. Fill the grey water tank about half way, turn off, pull slide valve and quickly drain. Repeat a few times if necessary. The hotter the water, the faster and more thorough it will clean the gunk out. If that don't do it, you got other issues other than grease blockage.

[TonyMac]

SNAKE! oPEN THE VALVE AND snake THAT THANG.

[meddiver]

Originally Posted by TonyMac

SNAKE! oPEN THE VALVE AND snake THAT THANG.

I have to snake mine every couple of months. I do not know what our issue is as we are very careful about what goes down our drain. We also use those nasty chemicals and bacteria regularly. I changed the valves out as well, and it still clogs. We bought our MH used so I can only guess what was pout down the sink prior. We have had ours for over a year and it still clogs occasionally. I keep a snake in my compartment and snake it out from the flush side. I usually get some nasty stuff.
Good luck!

[okmunky]

If you don't have one of these in every sink and shower drain I highly recommend them. Walmart sells them for $4, but Amazon had a better picture. They keep all sorts of crud out of the gray tank.

https://www.amazon.com/Camco-42273-A.../dp/B000T9YO5E