Flow Check Banging

WilsonMechanical

Hey guys,

Here's my situation : The installing contractor is nowhere to be found and I'm called in to pick up the pieces...



I have an Weil Mclain Ultra boiler with a Plus 40 tank...



If the domestic hot water is not calling, and the house zone calls for heat, I get a loud bang from the domestic flow check when the boiler and system circulators come on.

I am able to recreate the bang on command by shutting and opening the ball valve between the domestic flow check and the boiler.



Side note: the installer has the flow check mounted vertically, with the knob to the left... aren't they always supposed to be mounted horizontally with the knob facing up?



I'm thinking this is my problem but wanted confirmation before I cut it out and move it.



Thanks guys!

Mike

Ironman

Flow Check

Is the flow check a straight through or a 90deg ? If it's a 90, then yes, the knob should be up. I can't recall at the moment if that applies to the straight through.





P.S.



Just checked the B&G manual:the stem must be up in any application.

WilsonMechanical

straight through

Its mounted like this..

Eric_32

I've never

I've never installed a flow check in that postion in the 20-years i've been doing this.

Definately repositioning the check should solve your problem.

WilsonMechanical

Thanks!

I know what I'll be doing Monday...



I appreciate the fast responses guys!





Mike

icesailor

Flow Check:

I saw the knob has to be up and on the top if that valve is what you are using. Ther disk is weighted and falls down by gravity. I think when they talk about vertical applications, it means that the vertical pipe goes in the bottom and turns through the valve. If it is horizontal, the water flows in one end and out the other. You plug the unused hole.

What were they thinking?

No wonder they can't be found.