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I pull over to pee all the time.
 

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Why would you need to drain the tank? It has a bladder in it. It won’t get water logged.
You drain it when it goes bad and you need to change it.....

My peeve is when they get installed nipple up. I install my dom. hot exp. tanks nipple down, preferably hanging on rod if they have the nut welded to them.
 

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Then you have to drag in an air compressor. i'd rather have a drain.
Do you stock an expansion tank in your van? Do you make a run to the supply house? Or do you diagnose the problem and schedule a return visit?
 

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How do you tune them when you install them?

I read somewhere valving an exp tank is bad. Last one I saw i used it to change the tank and left it. The employees weren’t going to be touching it.
That's why we take the handle off if there's a valve. The only problem with a valve on an expansion tank is someone can turn it off if they don't know better. Tank leaks, someone just shuts the valve and leaves a note that never goes anywhere.

Most of the houses we work on that require an expansion tank are the kinds of houses with a property manager who keeps things straight, so often we will put in a valve to make our lives easier.
 

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I take care of the same 30+ buildings plumbing. So I can do both 😂
Well see that's not a normal service plumbing scenario. No need for a drain in my case because first service call is diagnosis, I add air to get them by till we return. Upon return just shut cold to heater, drain some from the bottom of the heater and the air I added last time will empty the tank for me.
 
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What the f are you talking about? An expansion tank had flow for four minutes? On a water heater at a house?


This ought to be good.
He couldn't even bother to post an intro, what kind of guy do you think he is?
 
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Yep, 3 screws per joint. When people use foil tape on the joints they’re usually trying to hide something.
Not if they squeegee the tape down well, then it's just going the extra, unneccesary mile.
 

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@dhal22
I would guess nothing prohibits an isolation or drain valve no matter how unnecessary.
Most if not all codes forbid a valve that can isolate a safety device from the system it's protecting.
 

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Can you tell me what code numbers that’s in the model codes under ?

I’ve never read that in the model codes. I’m sure some jurisdictions may have it amended into the code but that wouldn’t qualify as most.
Aren't you in Alabama?
 

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