I always hated people that stacked valves... all to save the price of a valve box. But, the race to the lowest possible price takes its toll.... the last time I encountered that, I warned the homeowner that the first time I'd have to service a valve in the bottom row, the price would start @ $1000. About two years later.. I had to service a bottom valve. I think with inflation and taxes it was $1200 to rip it apart and do it right...
this space left intentionally blank