International Association of Certified Home Inspectors
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| Plumbing Contains discussions about plumbing. |
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#1
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A builder of a new home is claiming that there is no backflow preventor present on the home and thus no expansion tank is required.
Isn't a backflow preventor integrated into this pressure reducer? Notice the one-way arrow.
Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
| Find an InterNACHI certified New Hampshire Home Inspector (and anywhere else in North America) |
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#2
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Hello Tokyo! Any plumbers awake tonight?
Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
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#3
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I thought those were one way too, and how does the builder know the city does not have a check valve at the street?
B.A. King Home Inspections, LLC www.BAKingHomeInspections.com Serving Charlotte NC area and Rock Hill SC areas. CMI Certified Master Inspector and Independent 704 301-3207 Last edited by bking; 5/8/09 at 10:55 AM.. Reason: sp |
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#4
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How can it possibly reduce the pressure if allows backflow to the street system? I think the builder is blowing smoke or ignorant of these valves.
Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
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#5
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I linked this thread over to IN and Jerry over on Inspection News found a technicality (imagine him doing that) with your post Joe.
An expansion tank is not required. An approved device for thermal expansion control is the correct phrase. Lots of posts over there but no one has come up with a model number of your valve and data sheet yet, got any numbers? B.A. King Home Inspections, LLC www.BAKingHomeInspections.com Serving Charlotte NC area and Rock Hill SC areas. CMI Certified Master Inspector and Independent 704 301-3207 |
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#6
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Quote:
In 2 days, you're the only one who has replied to this post, which I think should have created a good technical discussion. Guess I'll be spending more time at Inspection News. Thanks Bruce. I've changed my wording. Here's a tag that was on the valve. I've already researched it. It's apparently an Apollo valve. I could not get any technical info about how it functions.
Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com Last edited by jfunderburk; 5/8/09 at 11:21 AM.. |
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#7
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Be patient. It may have been two days, but I just now looked at your post. If I had an answer for you, I would give it, but I don't know. Someone else will likely be along. Business is picking up. Remember IN is full of out of work ASHI guys, so obviously they would post more.
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#8
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I'm not an ASHI member and I've had a good year! I too can't help on the thread -- sorry Bruce Thompson Professional Inspector, Lic. #9199 Serving Tyler, Lindale, Bullard, Whitehouse, Mineola and the surrounding East Texas area. www.TylerHomeInspector.com NACHI 06081394 |
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#9
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OK, maybe i do.
Aren't most pressure reducers installed a certain direction because of the size of the adjustable orifice on the downstream side? Therefore, there is not a backflow preventer built into the device. Is that what you're asking? Bruce Thompson Professional Inspector, Lic. #9199 Serving Tyler, Lindale, Bullard, Whitehouse, Mineola and the surrounding East Texas area. www.TylerHomeInspector.com NACHI 06081394 |
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#10
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#11
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Whether or not "back flow prevention" is present is probably not what I mean to ask. What I mean to ask is whether the presence of the valve pictured means the system is closed and thus requires thermal expansion control. Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
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#12
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Quote:
"Never ever threaten anyone in Camoflage" Tim Wilson "Not everyone follows the same path" Governor Sanford, musings on the Appalachian Trail
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#13
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Good info, thanks!
But that does present another question, I believe Joe was told by another inspector that we know, that he monitored the pressure on a house that had one of those valves and saw it skyrocket while the cold water tank was heating, with no hot faucet open anywhere. B.A. King Home Inspections, LLC www.BAKingHomeInspections.com Serving Charlotte NC area and Rock Hill SC areas. CMI Certified Master Inspector and Independent 704 301-3207 |
| Find an InterNACHI certified New Hampshire Home Inspector (and anywhere else in North America) |
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#14
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Quote:
Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com Last edited by jfunderburk; 5/8/09 at 9:38 PM.. |
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#15
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That would explain why the plumbers are now installing some other expansion device, besides its required now.
I see a lot of those small thermal relief valves with the small clear tubing for the discharge line. Lots cheaper than the blue tank method. B.A. King Home Inspections, LLC www.BAKingHomeInspections.com Serving Charlotte NC area and Rock Hill SC areas. CMI Certified Master Inspector and Independent 704 301-3207 Last edited by bking; 5/8/09 at 8:08 PM.. |
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