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-   -   Help with check valve on recirculating pump (http://www.diychatroom.com/f7/help-check-valve-recirculating-pump-119484/)

joeq 10-07-2011 08:22 PM

Help with check valve on recirculating pump
 
I have hot water radiating throughout my cold water pipes.

I'm wondering if my plumber forgot to install a check valve behind the recirculating pump. Or is this normal?

please see pictures

http://joefrescoln.com/plumb/checkvalve.jpg

http://joefrescoln.com/plumb/checkvalve3.jpg

Thanks for the help.

ddawg16 10-07-2011 08:47 PM

Yea....you need a check valve there....

Mark Potter 10-07-2011 09:30 PM

Yeah unless he put the pump facing the wrong way.

H|P Capital

Alan 10-07-2011 09:31 PM

Wondering what that other cold line runs to. That could potentially radiate hot water as well. Problem is that you have it on the wrong side of the recirc pump line, so there's no way to put a check valve there that will stop the water from going that direction.


:yes:

Alan 10-07-2011 09:31 PM

Quote:

Originally Posted by Mark Potter (Post 744158)
Yeah unless he put the pump facing the wrong way.

H|P Capital

There's a check valve at the wall. It wouldn't be doing anything besides making the pump smoke.

ddawg16 10-07-2011 09:45 PM

Quote:

Originally Posted by Alan (Post 744160)
There's a check valve at the wall. It wouldn't be doing anything besides making the pump smoke.

???????????

If your refering to what I think your refering too....I think that is just a reducer.....

Mark Potter 10-07-2011 09:59 PM

The check valve should have a access cover on it to get to it & make shore the little door inside works I can't tell if thats one or not?

Can we get a better pic? Maybe wider angle and higher up?

Why are the 2 ball valves closed?

H|P Capital

joeq 10-07-2011 10:06 PM

That other pipe goes to the geothermal heat pump. Which I think he may have hooked up wrong as well. That is why I have it off right now.


i uploaded a clean pic of it. maybe it will help.


http://joefrescoln.com/plumb/checkvalve2.jpg

joeq 10-07-2011 10:10 PM

the recirculating pump is pumping toward the cold intake, according to the arrow on the side of it, under the insulated cap.


I'll go snap another pic from the top.

thanks for the help! my familly is bugging me about it...

Mark Potter 10-07-2011 10:26 PM

Quote:

Originally Posted by joeq
That other pipe goes to the geothermal heat pump. Which I think he may have hooked up wrong as well. That is why I have it off right now.

i uploaded a clean pic of it. maybe it will help.

http://joefrescoln.com/plumb/checkvalve2.jpg

Ok so you are taking water from the tank and sending that to the coils that go under the ground then comes back into a pump that creates the heat right?

Well I can tell you this doesn't look the way it was set up way to close the wall and corner for that matter.
Is the circulator humming or making a noise that indicates it's running?

H|P Capital

joeq 10-07-2011 10:36 PM

Well the geothermal heatpump is supposed to assist the hotwater heater when its compressor is running. but I have that section of it off right now as i try to figure this out.


Yes the circulator is running and humming.. working well because its heating up all my cold water pipes too :/ which is why i'm wondering if i should have a check valve or something to keep it from doing that.

here is a different pic.. maybe better.

http://joefrescoln.com/plumb/checkvalve3.jpg

Mark Potter 10-08-2011 08:00 AM

Quote:

Originally Posted by joeq
Well the geothermal heatpump is supposed to assist the hotwater heater when its compressor is running. but I have that section of it off right now as i try to figure this out.

Yes the circulator is running and humming.. working well because its heating up all my cold water pipes too :/ which is why i'm wondering if i should have a check valve or something to keep it from doing that.

here is a different pic.. maybe better.

http://joefrescoln.com/plumb/checkvalve3.jpg

This is the only circulator on the system?

H|P Capital

Jackofall1 10-08-2011 08:17 AM

I would say you need a check valve there and in the geothermal loop as well, otherwise you will be backfeeding out to your geo system.

Mark Potter 10-08-2011 08:24 AM

Here is your problem after looking at the last picture your return should not be connected to the cold line out from tank there for you are getting the hot water from the return back into the cold tap.
Your loop is all messed up tell the plumber he needs to come back move the line needs to go back into boiler directly move or eliminate the cerc pump to hot water line out.

H|P Capital

Jackofall1 10-08-2011 08:30 AM

Quote:

Originally Posted by Mark Potter (Post 744302)
Here is your problem after looking at the last picture your return should not be connected to the cold line out from tank there for you are getting the hot water from the return back into the cold tap.
Your loop is all messed up tell the plumber he needs to come back move the line needs to go back into boiler directly move or eliminate the cerc pump to hot water line out.

H|P Capital

As a matter of correction, cold is "IN" there are a couple of options for running a loop like this, the plumber has installed this option which is fine, it just needs a check to the stop the loop from back feeding into the incoming cold line.

Another option I have seen is to tie the return into a "T'd" drain at the bottom of the tank.

Mark


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