2 x Wall pipe
2 x Wall pipe
(OP)
please see this guy's post over her,
thread633-232341: Codes or Norms governing double walled underground pipe
thread633-232341: Codes or Norms governing double walled underground pipe
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/




