View Full Version : replacing main, expansion loop?
07-28-2010, 10:34 AM
I'm in Bothell, WA, currently replacing the main between the meter and house. I plan to use type L soft copper, probably sleeved with some closed cell foam.
The run is about 70ish feet, with a couple of bends; up a rise and around the foundation. Is an expansion loop necessary? or will the bends take up any expansion and contraction?
Any recommendations on a place to get a 100 foot roll of type L soft at a reasonable cost?
07-28-2010, 02:04 PM
I wouldn't put in an expansion loop.......
Not sure where to buy the copper down there but you'll probably end up paying $450-$500 for 100' of type 'L' soft copper while you'd pay about $100 for 100' of 3/4" pex....
07-28-2010, 02:48 PM
I would go with 1" PVC. 3/4" copper over that much distance will lose too much pressure and flow due to friction, and 3/4" PEX is smaller inside diameter than copper so the loss would be even greater.
07-28-2010, 03:42 PM
If his PRV is in the house and he has high pressure going through his main line then he shouldn't have anything to worry about.
07-28-2010, 04:34 PM
I would use PE
Under 100', I would use copper since it does not need joints like PVC would. No comment on using PEX, because I would not.
07-29-2010, 09:06 AM
I've looked into all the options; I don't want any joints and I don't want plastic. The wife has a wicked sense of taste and the last thing I need after installing a new main is "babe, the water tastes funny."
Avoiding that is worth the extra $$. I plan on using 1", not 3/4.
Now, just trying to figure out how to best protect the pipe from rocks and roots etc. I plan to wrap it with closed cell insulation and bed the main in sand. Any other thoughts??
I think I found a pretty good deal online for 100' of one inch type L, $385