Home » Public Forums » GMCnet » Black Tank Replacement
| Black Tank Replacement [message #239170] |
Sat, 08 February 2014 08:11  |
mickey szilagyi
Messages: 273
Registered: January 2013
Karma:
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Senior Member |
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We have removed the single black tank system on our 77 Kingsley and have discovered too many cracks and issues to try and repair it. So, we're planning to replace it. We are also putting on a macerator while we're at it. Thanks to a bunch of you and your photos we have a pretty good plan on the macerator installation however we have some questions and would appreciate any help/suggestions you may offer.
We're trying to figure out the best way to establish the locations of the three holes we will have to drill in the top of the new tank. We need a 1.5, 2, and 3 inch. We're thinking of using the old tank as a template to make another template out of cardboard and make sure everything lines up properly.
We think we have the 3 inch toilet nipple pipe installation figured out - screw it into the new tank fitting and then hold the tank up to the bottom of the coach and screw the toilet flange until it rests on the shower floor and the screw holes line up with the holes through which the screws go to hold the flange to the plywood underneath.
We don't know how the other two tank drains attach to the respective drains that are protruding through the coach floor. The drains coming from above must go inside the drains coming up from the tank. But how do they seal or what is the trick to get them sealed? The PO made kind of a mess with the old setup. This is the part we really need help on.
And, how do we glue or attach the new fittings to the new tank once we have the holes drilled? Is there a special adhesive/caulk to do this? Do they screw into the tank or just set inside the new holes? We've read that ABS is difficult to glue to. Or do we just use the stuff that comes in a can that is used to attach two pieces of ABS pipe together?
Any think else about this installation you may wish to comment on please do...
Thank you all in advance for your input.
Mickey
1977 Kingsley, 403, Lansing, MI
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