Vibration Damping for DWV Hangers???

[Mike]

Home repair folks,

The plumber did a wonderful job installing our new sump pump and hung up the DWV pipe with plastic J-hook hangers solidly to the basement ceiling joists. When water flows thru the pipe, the whole floor vibrates and is very noisy upstairs in the bedrooms. The pump itself is fairly quiet. Just the pipe vibration is noisy.

Is there any such thing as a vibration damping pipe hanger? Maybe something like a tailpipe hanger for a care, with a rubber section between two clamps, only made for PVC pipe.

Any ideas?

[BobK207]

Switch to cast iron

cheers Bob

[genebradley]

Those tailpipe hangers for cars are just pieces of old tires. You can get an old tire for free almost anywhere. Cut strips from the sidewalls (not the steel belted tread). A saber saw will cut them. Make the strips long enough to go from the joist around the pipe and back to the joist. Screw the strip of tire to the joist with a washer under the screw head. Drill a hole in the rubber strip just above the pipe and put a bolt thru with washers on both ends. Put a nut on the bolt and tighten. Use as many of these as there are plastic hangers. Remove the plastic hangers and enjoy the quiet pump. Total cost, a few screws, bolts nuts and washers, and maybe a saber saw blade. Probably about the same price as a Big Mac, and much less fattening.

Gene

[Tony]

Gene that is excellent suggestion thanks I don't need any of that but I will definitely try to remember that Tony

[Bob M.]

instead of doing that, cut a car floor mat up. Easier to cut, using only a utility knife.

Or, what I would do is put a section of rubber hose in the plastic pipe near the pump. Most likely the pump's vibration is being transmitted down the pipe, so if you cut an inch or so out of the plastic & insert a rubber "joiner" (I'm not sure what they're really called) the vibration problem will go away.

[HerHusband]

Is it actual vibration, or does it sound like thunk, thunk, thunk sounds as the pipe expands?

We had expansion noises where our plumbing passed under our master bedroom. Everytime the dishwasher drained hot water, the pipes would "thunk, thunk, thunk" as the pipe expanded from the hot water and jerked through the J- hooks.

I eliminated the noise by replacing the "J-hooks" with "Zipsticks"

I wrapped a few turns of fiberglass insulation around the pipe, then attached the Zipstick hangers.

We haven't had any noise problems since I switched to the Zipsticks.

Anthony

[Mike]

Thanks for the replies and ideas folks.

I appreciate the responses.

[DerbyDad03]

I used a few pieces conveyer belt material that a friend had lying around to hang my Garage Door Opener. The boys, who live above it, say it lessened the noise by more than half.