Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Display Modes
Old 07-25-2011, 03:56 PM   #1
Bus Nut
Join Date: Sep 2008
Posts: 446
Year: 89
Coachwork: thomas
Engine: 7.3 diesel
Re: hacking a grey water tank

I used a 55 gallon plastic tank in a concession trailer one time. It worked great, I even had a pump to pump the water out, used a regular household hose..

see my conversion at
putterspitt is offline   Reply With Quote
Old 07-27-2011, 08:57 AM   #2
Bus Geek
lornaschinske's Avatar
Join Date: Jun 2004
Location: Roswell, NM
Posts: 3,588
Year: 1986
Coachwork: BlueBird
Chassis: 40 ft All American FE
Engine: 8.2LTA Fuel Pincher DD V8
Rated Cap: 89
Re: hacking a grey water tank

Originally Posted by kouka
Cool, thanks. What's a concession trailer?

I'm guessing a garden hose won't work with gravity emptying...
I'm guessing FOOD concession. Food vendor. Even been to the fair? With a tank of that size (55 gallon) I would say it was a "big boy" trailer.

The smallest pipe I would use for drainlines would be the size you see under a bathroom sink (about 1 1/2" I think). Use standard household piping and you can replace pretty much anywhere. The BIG garden hoses will work but you can't have any food particles clogging up the hose. So you would need a hose with the biggest interior dimensions you can buy PLUS all the fittings would have to be the same (mans you are using PVC plumbing fittings not standard garden hose fittings.

You can get away with a non baffled tank IF you don't travel with more than a couple of gallons of waste in it. Depends on how you travel.

You need to read Phred's Poop Sheets and look at Marks Water Page
This post is my opinion. It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Fulltime since 2006
The goal of life is living in agreement with nature. Zeno (335BC-264BC)
lornaschinske is offline   Reply With Quote
Old 08-17-2012, 10:13 AM   #3
Bus Crazy
Join Date: Mar 2011
Location: Oregon/Philippines
Posts: 1,660
Re: hacking a grey water tank

As suggested, you need to read basic plumbing construction. Normally size for inlets is around 1/2 inch, and Drains 1 1/4 to 1 1/2 or a mixture of both, as many bathroom drains are the 1 1/4 and the kitchen 1 1/2 . Either size will work well in an RV. You also need to consider buying a 12v pump to between your fresh water tank and the sinks.
The grey water tank discharge should probably be at least 2 inch or so. If you are going to have both a black and grey tank, you really should either go buy a used "T" set up that connects the grey and black tanks together with shut off valves for each side, and plumb up both of the discharge in these systems with 3 inch plastic pipe, as that is what the RV's use. These parts can also be bought new, or sawed off of a rv in a wrecking yard..(hopefully the tanks are empty)

So you need: fresh water tank, pump, maybe hot water heater, something like pex pipe, sinks, shower, toilet and connections, grey and black water tanks, as well as all those fittings. You will also need to vent all of the tanks, and sinks...
Jesus Christ... Conversion in progress.
chev49 is offline   Reply With Quote
Old 08-17-2012, 10:29 AM   #4
crazycal's Avatar
Join Date: Feb 2007
Location: NUNYA
Posts: 4,236
Year: 1995
Coachwork: Thomas
Chassis: 3800
Engine: DT408, AT545
Rated Cap: 23 500 gvw
Re: hacking a grey water tank

Aren't you a busy beaver dragging up posts fromthe dead?
I'm hungry!

You Gotta Let Me Fly
crazycal is offline   Reply With Quote
Old 08-18-2012, 11:15 PM   #5
Bus Crazy
Join Date: Mar 2011
Location: Oregon/Philippines
Posts: 1,660
Re: hacking a grey water tank

Haha... someone finally noticed...
Jesus Christ... Conversion in progress.
chev49 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
help on black water and grey water hookups heath692 Plumbing, Water and Waste 8 04-18-2015 05:57 PM
One Tank or Two? (Grey/Black) Hex Plumbing, Water and Waste 13 06-29-2011 06:30 PM
Fresh, grey, and black water tank size. what do you have? Jerry Campbell Plumbing, Water and Waste 3 10-31-2008 09:56 AM
grey water tanks bocephus Everything Else | General Skoolie Discussions 1 12-23-2005 11:21 AM
Grey water tank skyhorse Conversion General Discussions 2 10-06-2004 08:26 PM

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:52 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.