I have recently taken on a golf course and many of the lines are larger 1 1/2" plus. There is also higher pressure than you would normally see in residential, possibly much higher pressure during certain conditions. What type of couplings and techniques would you use? From what I have seen so far the typical repair couplings you would use on residential are prone to failure. Mechanical type couplings would be nice in some places since there are elevation changes with no way to shut off the water flow so it can be difficult to glue.