<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by RidgeRun05</i>
<br />I would put in expansion coils every 100 feet or so, this way, reguardless of where you place your valves, you should be alright. Ideally, you want the expansion coil at the valve, but if you are unsure of where you are placing your valves, go for the next best thing. Like Wetboots said, if you are using modern valves, 18 GA wire all around will be just fine.
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Thank you, but I might have interpreted this wrong.
I was thinking that the expansion coils were needed for soil movement. And in my mind I could envision that as a very likely possibility for various reasons. But maybe I took this wrong. Maybe you are talking about some kind of expansion that happens right at the valve.
In either case I will install coils every 100 feet or so even if underground. it still makes sense to me that the ground could move and place stress on the wires - possibly breaking them underground if the movement was severe enough.
It also looks like most installations go with uncut wire. My runs are so long that I do not know if I have that luxury.
Is this an absolute rule that the wires are not spliced together? If I am forced to do splices, can I get by OK with soldered connections at the splice?
Martin Petersen