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They're all fixer-uppers
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Discussion Starter · #1 ·
Installing a new 50 Gal electric water heater. I'm moving the unit to the back of the room. Do I need to install a vacuum breaker on the cold supply, I've heard yes and I've heard no.
 

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They're all fixer-uppers
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Discussion Starter · #3 ·
Hey Ron, I think maybe different names are the problem. Anti-siphon device? Backflow preventer?

http://en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

I just say vacuum breaker because the device I happened to have is a vacuum breaker, w. the little hood on top.

If you do say yes, the other question is, do I have to install it upright or can I install it upside down or verticle??

Thanks again!
 

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They're all fixer-uppers
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Discussion Starter · #5 ·
Thanks! There was one on the old line to the water heater but I hadn't seen one before that. After seeing it, I asked around, heard some yeses and some nos. I defer all to your knowledge. Thanks Ron.
 

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Mandatory in Massachusetts - Must be installed Upright

Hey Ron, I think maybe different names are the problem. Anti-siphon device? Backflow preventer?

http://en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

I just say vacuum breaker because the device I happened to have is a vacuum breaker, w. the little hood on top.

If you do say yes, the other question is, do I have to install it upright or can I install it upside down or verticle??

Thanks again!
Mandatory in Massachusetts

Must be installed upright (so it looks like a Mushroom)

Watts N36

Water Service Vacuum Relief Valves

http://www.watts.com/pages/_products_details.asp?pid=815
 

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The purpose of a vacuum breaker at a water heater is, in the event extreme suction should be applied to the water system, for example a fire engine pumper fighting a fire down the street, the water heater tank doesn't collapse or implode.
 

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The purpose of a vacuum breaker at a water heater is, in the event extreme suction should be applied to the water system, for example a fire engine pumper fighting a fire down the street, the water heater tank doesn't collapse or implode.
Good Point.

They're only about $15. Of course you may need extra fittings which will likely double the cost. I think it's worth the expense. Especially since I believe you can use the same Vacuum Breaker over and over again.
 

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