[pure-silver] Re: new darkroom
- From: harry kalish <hksvk@xxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 21 Dec 2011 22:01:39 -0500
Yes, you have to have an anti-siphon device on each supply line in
situations where a flexible line attached to the water outlet can dangle
into the sink.
Harry.
On 12/21/11 9:26 PM, "Jean-David Beyer" <jeandavid8@xxxxxxxxxxx> wrote:
> Tim Daneliuk wrote:
>
>> . It is a REALLY good idea to have a plumber install one way valves
>> on the hot/cold water supply lines you'll use in the darkroom. This
>> prevents things like, say, having your dirty chemical water siphoned
>> back into the water mains if someone flushes a toilet while you have
>> a water hose laying in a tray.
>>
> In my upstairs darkroom, the hot and cold water enter at the left. The
> first thing there are a couple of ball valves. Next are a couple of
> unions. Before the two pipes get anywhere, they go through a pair of
> vacuum breakers so as to prevent siphoning stuff from trays and washers
> back into the domestic water system. Some plumbing codes require
> anti-backflow valves.
>
> Now if your darkroom is the lowest connection in the house, you are much
> less likely to need them because siphoning has to have somewhere lower
> to siphon to. But there could be such a place if you are on the top of a
> hill, for example. Your authority having jurisdiction could clarify this
> for you. The AHJ is likely the plumbing inspector.
>
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