Low Pressure On 1 Sprinkler Head

[waders]

I have a 10 zone sprinkler system with 4 heads per zone. It's worked great for years. This spring, one head on one zone would only spray water 3 ft (verses 20 ft). I replaced the head and and it would still only spray 3 ft. There were no leaks at any of the sprinkler head connections. I took off the head and there seems to be good water flow, but very low pressure. I don't understand how I can have low pressure on one head while the three other heads on the zone are working fine. Any ideas or suggestions?

 

[FloridaOrange]

Could have a kink in the line further up after the three heads that work fine. What's the material?

 

[Sponsor]

 

[waders]

The tubing is 3/4" poly from the valve with 1/2" poly tee'd off going to each head. The problem head is either the first or second heads Tee'd off of the 3/4" line.

 

[FloridaOrange]

Have you inspected the 3/4"x1/2" tee?

 

[waders]

Not yet...regretably it will take a lot of digging. Also, that Tee is close to where the utilities enter the house, so I'll have to get them marked prior to digging.

 

[Wet_Boots]

What about the possibility of tree roots choking off the supply?

 

[Chris8796]

Have you checked the valve for problems? Some valves have built in filters, which can become clogged. Does the valve have flow control and is it opened up?

 

[waders]

Problem Fixed! FloridaOrange nailed it. The problem was at the Tee. The tubing (not the Tee) was cracked just after the Tee. I spliced in a new peice of tubing, put on the old head, and everything works great.

It didn't take as much digging as expected. As I was trying different things, water began seeping up from the crack. Thanks for your help.

 

[FloridaOrange]

Problem Fixed! FloridaOrange nailed it.

Gonna have to send my wife a link to this!

Just kidding, glad to help where ever I can.