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View Full Version : hammering drain pipe after sump pump cycles


shorty
11-05-04, 05:15 PM
I don't know if anybody else has come across this problem but I think I solved mine.

A few weeks back I replaced the submersible pump down in my basement. The washing machine and the house's drain tiles all drain into the sump pit. The pump discharges straight up into a 3 foot 1 1/2" pvc pipe through a check valve and then up through 1 1/2" galvanized steel pipe which elbows at the basement ceiling and then continues till it hits the main drain and then out to the city sewer.

I solved a different problem by rodding out my main drain line but now the drain pipe off the sump pump was hammering after the pump would complete it's cycle. I tried padding the pipe with rags between the elbow and the basement ceiling to muffle the noise. This helped a bit but the noise was still loud. I decided to put in a air camber above the check valve by placing a pvc tee and then elbowing up a 2 foot 1 1/2" piece of pvc. The total cost was less than $10 and it seems to have worked . I filled up the sump pit 3 times and each time the pump finished it's cycle I didn't hear any hammering from the pipes.

hammer time ?!? ......not a chance :rolleyes:

pb4021
11-12-04, 04:35 PM
yes, i had a post about the very same thing in the pluming and piping forum.
nice idea...
anyside affects or drawback to doing that??

i installed an extra check valve and that helped but it still gives a pretty good bang when it cycles..of course its better than it was ;)
might give this a try this weekend, just for kicks.

pb4021
11-22-04, 12:00 AM
Ok, I gave it a shot just for kicks and found that it acually made mine louder.
so, I will be removing it next week end.
thanks for the sugestion though.
:rolleyes: