Monday, October 5, 2009

How much water pressure is needed for auto watering?

Watering System Question

Q. When I set up my watering pipes, I made a separate hose attachment for each row.
Now I would like to connect them to a manifold to water several rows at a time.
How many rows can be watered at once with a typical house faucet pressure? The
south side of my garden has 9 rows, and the north side has 4. Thanks!

A. With a water source of a 3/8" (sometimes smaller!) water hose you won't have much
success watering multiple rows at the same time, unless your rows are
substantially shorter than 30'.

I water 25 rows at one time, but I have a 2" main line with water delivered by a
5 HP Honda pump. The laterals that feed 20-25 rows are 1 1/2", and T's that feed
individual beds are 3/4".

A 1" main line could water several beds at a time - the number being dependent
on the water pressure to your garden.

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