|
Posted by Tom Horne, Electrician on January 6, 2007, 4:23 pm
Harry K wrote:
> Sudy Nim wrote:
>> Thank you all for taking time to post your replies I learned a lot. I
>> have two sump pumps one is connected to the drain tile the other to a
>> sump hole that is use to remove the discharge of wash water from the
>> basement wash tub, it came that way with the house. The pumps are both
>> located in heated areas inside the house. The discharge line all 1½
>> inch pipe about 100 feet long and down hill, connected through an in
>> ground, outside "Y" from the two pumps. The winter here can get to
>> freezing or below but I have not had any problems with freezing. What
>> I do experience is one pump turns on and when it quits I hear water
>> running which I guess is the water in the line inside the house
>> flowing back into the sump hole or holes. But I can't understand how
>> it could get through the check valves, which should be closed.
>> Thinking it might be cause by suction, I added a standpipe about 3
>> foot high inside the house to see if that would help but it didn't.
>> Both pumps have new operating check valves about 5 feet above the
>> bottom of the sump hole. The vertical length of discharge pipe from
>> the bottom of the pit is about 6 feet. One pump needs to be replaced
>> and I just did not know how many check valves to use or if the valve
>> was really needed. From what I read here, I guess that it is the water
>> below the check valve that I hear so I suppose a valve at the pedestal
>> would be correct for my installation?
>
> My set up is pretty similar. One pump, check valve jsut above pump,
> pipe up to ceiling - 30 ft run across basement with a slight down
> slope, verticle down to exit the basement and 75 ft to the outlet - all
> 1 1/4". Yes, I can hear water running after the pump shuts off but it
> is the pipe emptying, nothing running back into the pit. Remember that
> you have a -long- run of pipe that can only empty by air entering and
> that air has to come in the outlet end unless you have some type of
> vacuum breaker installed above the check valve. Not really needed IMO
> unless you have a poor slope to the pipe.
>
> Harry K
>
Harry
First be advised that my father was a plumber and out of pure orneriness
I did not follow him into that craft. What I don't know about plumbing
would be almost everything there is to know about it.
My question is wouldn't having a vent allow the drain line to empty far
more quickly and quietly? Any time my Dad was looking into a drain
problem he would listen first. He seemed to believe that noisy drains
always had a vent problem.
--
Tom Horne
"This alternating current stuff is just a fad. It is much too dangerous
for general use." Thomas Alva Edison
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap