While on the subject of lawn sprinkler systems...

[Percival P. Cassidy]

Not that I'm really thinking of redesigning our sprinkler system, but out of curiosity I picked up RainBird's questionnaire/layout sheets to send in for them to design an appropriate system, and one thing struck me as very odd:

One is supposed to measure both the water pressure and the rate of water flow from a spigot, e.g., time how long it takes to fill a 5-gallon bucket. BUT is ours the only house where the existing sprinkler system is fed from a 1-1/2-in PVC pipe run from immediately after the meter, whereas the outside spigots are fed through 1/2-in. pipe beyond the pressure regulator?

What useful information would the pressure and flow rate measured at one of our spigots provide?

Perce

[Don Y]

Here, most homes feed their irrigation system off of the household water supply -- a 3/4" line from the meter to the house then, typically, 1/2" pipe feeding the hose bibbs on the periphery of the house.

We run the 3/4" copper water line through a stop, then the master valve and antisiphone device into a PRV (*just* for the irrigation system -- the house has a separate PRV and stop), through a fine mesh/high volume filter into a

1" PVC that feeds the 19 valves + PRV's for each of the 19 zones (4 of these are actually valve-controlled hose bibbs). [The PVC feeds the irrigation system in two directions (i.e., completely encircles the house) so the "far loads" don't suffer from drops in the ~250 ft run]

[Don Y]

N.B. Most homes, here, don't have big irrigation loads and rely on

*drip* irrigation -- much lower overall flow rates than "lawn sprinklers" that throw lots of water into the air (40% of which evaporates).

[Micky]

Where is here?

[Stormin Mormon]

Center posted, as your comment was.