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Author:
clesnick
I need to support 2" PVC vent pipe. There is a 10 foot vertical length inside a finished wall that joins another 10 feet running horizontally between two floor joists (in the middle of the bay).
What is the best way to support the horizontal pipe? Plastic J-hook hangers, zipstick hangers, notched wood with plastic tape, or something else?
How should I support the vertical length? I can only access the top and bottom of the pipe. There's a quarter bend at the bottom of the pipe that joins the horizontal run. Will a hanger on the horizontal run close to the bend be sufficient to hold the vertical pipe? Is there a hanger or clamp designed for vertical PVC?
Thanks for your help.
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Author:
royboy (SC)
I use perforated metal strap with a 3/4" screw to hold it to to flooring above and a 1/4" bolt and nut to hold the pipe. On the verticle, cut a 1X4 board to span between studs and the perforated strap and screws to secure it.
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Author:
packy (MA)
there are lots of different style pvc hangers on the market. what is important is that the hanger must be wide enough so as not to cut into the softer pvc over the years. in other words, no wire hook type hangers. i think mass code says 3/4" wide minimum.
if you want to use a hanger in the middle of a vertical run, clix hangers are nice.
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Author:
trev7615 (PA)
I use stack clamps set on the beams in the attic or 2nd floor these are designed to go around the pipe and bolt together. If i dont have enough hanger to go from beam to beam i straddle a plank from beam to beam and install hanger butted on the plank. Haven't lost a stack yet.
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Author:
packy (MA)
we call them friction clamps..
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Author:
e-plumber (NY)
We call them riser clamps...
e-plumber
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Author:
hj (AZ)
They go by either name, but with plastic either one would distort the pipe if you tighten them too tightly.
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Author:
packy (MA)
there goes that AZ math again. the term "either one" designates two differing clamps. as far as i know, we are discussing a riser/friction/stack clamp.
as stated many times here, overtightening something (fitting, nut or clamp) can lead to problems.
Patriots by 2 TD's..
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Author:
hj (AZ)
"either" one refers to the two names for the device, not two devices, but then it is 60/40 evenly divided as to which one is used in MA. "Overtightening" can occur a lot faster with plastic pipe than it does with a metal one.
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