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All
information and images provided are for guidance only, please
obtain full manufacturer technical manuals before proceeding
with any installation and/or repair.
If you feel you cannot
manage with plumbing your bathroom, please call a professional
recommended plumber to do the job correctly for you. |
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Most Common
Mistakes
- Violating or ignoring code restrictions,
- Not installing D/W/V with at least a 1/4"
slope per one foot pipe,
- Not properly venting or trapping all
fixtures,
- Attaching too many fixtures to a drain or
vent pipe,
- Using pipes that are too small,
- Not providing enough cleanouts or not
providing cleanouts at the prescribed places,
- Venting the fixture too far from the
fixture's trap,
- Not properly aligning tubing into fittings
or stop valves. (Forcing the nut onto the compression ring at an
angle when the tubing is at an angle will cause a leak.)
- Using a fitting in a wrong position,
- Installing rough plumbing in the wrong
location,
- Reducing pipe size as the pipes run
downstream,
- Cutting pipe too long and not allowing for
the ridge in the fittings, and
- Forcing the trap and waste arm fittings out
of alignment and putting too much stress on the nuts and washers in
the tubing.
- Make certain the compression tubing is put
in the fittings so that it is evenly tightened
Installing Drain Waste Vent Pipe
Running the pipe can be tricky. All different
kinds of fittings are available to turn in different and receive
different sizes of pipe at various angles. One fitting may need 3
opening ports, all accommodating a size pipe. You will have to plan
your runs and buy the necessary fittings (always get a few extra).
Keep in mind that codes may regulate how fittings can be used* (i.e.
sanitary tees may not be used in a vertical to horizontal
connections long sweep connection must be used here). You will need
to know the diameter of your pipes, their angles, the code and their
direction to determine each fitting.
While planning may take some time and study,
the cutting and assembly of plastic pipe is very simple
1. Using a back saw or a fine toothed saw, cut
the pipe the required length, remembering that the pipe fits into
the fitting a prescribed distance for each diameter of pipe.
2. Use a small knife or rough sandpaper to
remove the "burr" off the freshly cut pipe.
3. With a rag and some cleaning solvent, clean
the ends of the pipe and the inside of fitting where the pipe will
join. (ABS does not need this solvent or primer. It can be wiped
clean with a damp rag.)
4. The glue will dry almost immediately and
you can never get it unglued. To change the connection you must cut
out the fitting and start over. Because of this, you want to be sure
you have it right the first time. This is very easy in some cases,
but often you will have a number of pipes coming into a fitting from
several different angles. All of these must meet correctly once they
are permanently glued. To assure this, "dry fit" the fittings and
pipe by cutting and assembling everything without glue to assure it
all fits at the correct angles and dimensions.
5. Make marks across fittings and pipe so that
once the pipes are removed and the glue is spread, you will know
exactly how to realign everything when the pipes are inserted
permanently into the fitting. (Be sure the marks or lines are long
enough on the pipe so that they will not be covered by the glue you
will spread on the pipe.)
6. Spread a generous amount of the required
pipe glue around the end of the pipe and on the inside of the
fitting with a dobber.
7. Insert the pipe into the fitting until it
"bottoms out" and give it a little twist to be sure that the glue is
spread evenly.
One of the most difficult parts about running
drain waste vent pipes is drilling the large (2-3") holes necessary
to run the pipe. You will need to purchase, borrow or rent special
heavy duty plumbers' bits that are notched to fit 1 1/2", 2" and 2
1/2" pipe. The cheaper hole saw is just too difficult when you are
doing a large project. You will also need a heavy duty 1/2" or 3/4"
drill (preferably a right angle drill or one with a right angle
attachment). Be careful, as drilling with these large bits often
causes the bit to bind and the drill to spin.
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