When we bought this house, we inherited an irrigation system that is...
quirky. In particular, the portion of the garden best suited to growing
produce (due to sun exposure) is serviced by the very last irrigation
riser on its line, which ends up feeding a multitude of very small (1/4")
supply lines that must reach 20' to the last of the vegetable beds:
------ ------- ------ ------
( bed ) ( bed ) ( bed ) ( bed )
------ ------- ------ ------
| | | |
| | | +----------+
| | +--------------------( )
| +-------------------------------( )
+--------------------------------------------+
The pressure drop to the last bed was quite severe, leading to sub-par
growth the last few seasons. Today's project was to re-engineer the above
system with a new distribution network, with a new irrigation manifold feeding
a 1" supply line, and the beds tapping off this line directly.
------ ------- ------ ------
( bed ) ( bed ) ( bed ) ( bed )
------ ------- ------ ------
| | | |
--+-----------+----------+----------+------------------( )
| ( )
-------------------------------------------------------( )
Unsurprisingly, the resultant water pressure to the final bed is vastly improved,
with even pressure along the entire network now. In addition, the larger supply
line is located along the fence, with only short feeder lines, so the garden is no
longer a tangled web of lines and tripping hazards.
