replacing main, expansion loop?

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Seattle38, Jul 28, 2010.

  1. Seattle38

    Seattle38 New Member

    Messages:
    17
    Location:
    Bothell
    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?

    Thanks!
  2. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    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....
  3. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,351
    Location:
    Yakima WA
    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.
  4. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    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.
  5. nhmaster3015

    nhmaster3015 Master Plumber

    Messages:
    836
    Location:
    The granite state
    I would use PE
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,677
    Location:
    Cave Creek, Arizona
    Under 100', I would use copper since it does not need joints like PVC would. No comment on using PEX, because I would not.
  7. Seattle38

    Seattle38 New Member

    Messages:
    17
    Location:
    Bothell
    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

    http://kscdirect.com/item/L+COIL+1X100/JOHN+M+FREY+COMPANY_1+X+100+FT+COIL+TYPE+L+COPPER+TUBE%0A
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