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Posted by Rich on September 18, 2007, 9:11 pm
Nate Nagel wrote:
> dpb wrote:
>> Nate Nagel wrote:
>>
>>> What's the difference between Schedule 40 and, say, Schedule 60 or
>>> 80 pipe? ...
>>
>>
>> Schedule relates to wall thickness/burst strength only.
>>
>> --
>
> OK, thanks... I guess Schedule 40 will be OK for this app then as it
> is simply a 500 gallon cistern drain.
>
> Now get this... here's my rant of the day. Original drain plumbing,
> inside to out was:
>
> - Schedule 80 PVC 1" to 1/2" NPT reducer bushing
> - PVC 1/2" nipple appx. 2.5" long
> - PVC Sch. 80 1/2" ball valve
> - Brass 1/2" nipple appx. 2.5" long
> - Galvanized 3/4" to 1/2" NPT reducer bushing (backwards of course)
> - Brass 3/4" FIP to garden hose fitting
> - generic cast metal wye/double ball valve garden hose fitting, one
> side busted :(
>
> Failure mode was landscaping crew (that would be Mom and/or SWMBO;
> last weekend was quality family time/clean up my messy ass yard. Yeah, my
> parents are weird. Dad and I were manning the wood chipper
> when this occured. My dad bought me a wood chipper "for Christmas"
> this year. Actually a useful and appreciated present. But anyway)
> kicking above Rube Goldberg plumbing assembly snapping off PVC nipple.
>
> Now who'da thunk that putting three different metals together in the
> same assembly would cause them to bond themselves together for all
> time making the entire assembly unsalvageable? Esp. when they can be
> replaced by the following:
>
> - 1" to 3/4" NPT PVC reducer bushing
> - brass 3/4" close hex nipple
> - 3/4" PVC ball valve
> - brass 3/4" NPT to garden hose fitting
>
> getting rid of a buttload of length, restriction, and potential for
> galvanic corrosion (and the stupid wye which I never used anyway.)
>
> sheesh!
>
> The only downside of course was that Home Despot did not have a 1" to
> 3/4" bushing in either PVC or brass, so I had to order it from
> McMaster-Carr, which wasn't the end of the world as I actually had
> been forgetting to order something else from them for a couple days
> now.
> nate
>
> (I guess previous owners of houses are a lot like previous owners of
> cars...)
Sounds like he was going through is junk box to cobble that together?
Failure was mixing all those different metals and the galvanic action that
took place over the years and then the landscapers came along and finished
it off, but my guess is it was failing as soon as water was introduced and
failed when stressed.
Good luck, Rich
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