Posted 2012-06-18 7:56 AM (#144921) Subject: mounting a gray water holding tank
Regular
Posts: 55
Thank you everyone for your information on saw and blade types for drilling holes in the side of and the floor of my trailer for plumbing. I found a 16 gal. holding tank from a company that Gard suggested that will fit in between the joists of my trailer. I was hoping some of you who have done this could walk me through where to have the company put the opening on the top for the gray water to enter and how far back to set the tank to give room to open and close to drain to empty. I will call, but I'm assuming that these come with an open, close valve with a handle on them. Also, can I plumb so that my sink and shower will flow into the same tank? I believe after the P-trap on the sink I could run the pipe down and over to the shower which are side by side and drain into the tank placed under the shower which would be in the slant wall corner. Where would my drain hole in the shower pan have to be located for this? My joists under the trailer are 12" from 1 to the other. The holding tank I'm looking at is 63"Lx10"Wx 8"H. Perfect for fitting up in there I believe. A picture of how to put it all together or a website to show how would be wonderfully helpful since I'm clueless but willing to work on it and get it right. Thank you for reading my long thread.
Posted 2012-06-19 9:22 AM (#144951 - in reply to #144921) Subject: RE: mounting a gray water holding tank
Expert
Posts: 5870 Location: western PA
If you bought an ABS tank, you will have an easier time installing it in your trailer. The drain fitting will be mounted on the bottom of the widest part of the wedge. The valve will be attached to the flange and plumbed with ells to where you want it to end. It will be terminated with a coupling and cap.
Be prepared to mount and remove the tank a few times until it is finally secured into place for use.
It is very difficult to predict exactly where the supply fittings will be located until the tank is in its place under the floor. Then you can arrange your indoor plumbing, and know exactly where it will terminate above the tank. Marking the floor, and later drilling a pilot hole through the floor into the tank will give you an exact reference point, for the stack vent, drain lines, and toilet flange if this is a black water tank.
Each installation is different. I would suggest taking a camera to a trailer sales or friend's house and photographing their tank's installation. It's easier to see the final results than try to describe how it's fabricated.
mounting a gray water holding tank
