Integral Flow Check

Alan (California Radiant) Forbes

I ran into an older Taco DHW circulating pump with the IFC in the volute. It was intact and got me thinking that this is a better location for a check valve at least service-wise since it's a lot easier to work on. Having the IFC in the discharge requires you to remove the pump from the flanges in order to get to it.

EBEBRATT-Ed

I would suspect they would rather put any restriction on the discharge instead of the suction

Ctoilman

So far I'm not impressed with the integral check valve.  As you can see they're plastic, and obviously made as cheap as possible.  Seen a few stick open already after a few years of use.  But what really burns me is the cost of a replacement check valve....really?  

hot_rod

Bad idea to put a flow restriction close to the suction of a circulator, me thinks. Best practices is 12" of straight pipe up and downstream from the inlet and discharge. Checks in the discharge are not ideal either. These small wet rotor circs do handle some mis-piping and misapplication abuse.

clammy

I think that may be a older style from taco ,if memory serves that was the first offering from taco for built in flow check I remember I had issues w a few being stuck . At the time I thought it was stupid so I switched to grunfos w the checks in the outlets and really have had no issues . Brings back old memories peace and good luck clammy

HomerJSmith

That is a bronze volute. You can not put a plastic check valve in the output of the volute because when one solders the connection, the dang thing melts.

hot_rod

It is probably a DHW recirc, low head and always under line pressure, so cavitation would probably not be much of an issue.