Blocked grey water tank (1 Viewer)

Nov 29, 2022
72
14
Funster No
92,679
MH
Laika ecovip i400
Hi everyone!

Our grey water tank is blocked. Went to empty it this morning and nothing came out. Just a slight trickle. Fill the sink up and it keeps trickling.

I don't know if it's a blockage, or could the release valve not be working?

I don't know how I would go about checking the valve.

Have put two bottles of drain unblocked through it to no avail...

Any help appreciated
 
Apr 6, 2019
3,808
7,559
Eye, Peterborough, UK
Funster No
59,702
MH
RV
Exp
FourWinds Windsport 6.8L V10
I have used a long thin flexible pipe and pushed into waste tank from outflow end and sure enough there was a ball of slime/gunk just enough to block the tap outlet. Be careful with choice of cleaning rod as you don't want to tear holes where the pipes bend etc.... If you feel a resistance where the valve/tap is then you have found a faulty valve etc...
 
OP
OP
lukebolger
Nov 29, 2022
72
14
Funster No
92,679
MH
Laika ecovip i400
I have used a long thin flexible pipe and pushed into waste tank from outflow end and sure enough there was a ball of slime/gunk just enough to block the tap outlet. Be careful with choice of cleaning rod as you don't want to tear holes where the pipes bend etc.... If you feel a resistance where the valve/tap is then you have found a faulty valve etc...
Thanks man. On my Laika there's a lot of guttering, about ten foot worth before it goes to the tank, I shall see if I can remove it!
 

Kannon Fodda

LIFE MEMBER
Feb 26, 2019
2,636
8,118
Seek and Ye May Find
Funster No
58,768
MH
Autotrail V-line 540
Exp
I Make Schoolboy Errors!
Quite possible that the outlet from the tank into the drain pipe has bunged up. My PVC grey tank is underneath the van with a corrugated 22mm hose type thing suspended from the bottom side edge of the tank running out to a drain cock on the side of the van. I can often find only a trickle of water out of the drain cock, yet know the tank is full, and even pulling off the drain cock itself (it is simply push fit) makes no difference.

I suspect the mounting into my tank isn't that cleanly finished and over time the gunk in the tank snags and builds up leading to blockage. Once blocked it is too late for drain cleaner type stuff that never reaches.

I now carry a drain cleaning coil brush thing I can poke up from the drain cock end.

Try to avoid getting too much fatty waste into the drain system and I periodically tip a little tank cleaning solution down the wastes when driving off from somewhere so it can slosh around and hopefully release some deposits.
 
Jan 25, 2018
133
59
Leicester, England
Funster No
52,113
MH
Coachbuilt
Exp
2017
I have used a long thin flexible pipe and pushed into waste tank from outflow end and sure enough there was a ball of slime/gunk just enough to block the tap outlet. Be careful with choice of cleaning rod as you don't want to tear holes where the pipes bend etc.... If you feel a resistance where the valve/tap is then you have found a faulty valve etc...
 
Jan 28, 2008
10,137
18,421
Dovercourt, Harwich, UK
Funster No
1,353
MH
Renalt burstner
Exp
7 years campers before that
If youve put drain unblocker in be carefull when you realease the contents it will probably be highly corrosive
 
Jun 7, 2014
253
742
Cleethorpes
Funster No
31,869
MH
C class
Exp
2012
My experience, unless you are quick and agile you will be covered in gunk. My waste tank was blocked at it's outlet and removing the outlet pipe from the tank made no difference. Judicial probing with a screwdriver gave a little flow and then the floodgates opened, tried to roll out of the way but not as quick as I used to be. šŸ«£
 

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