0

I tried blowing out my sprinkler system and the pressure blew right though the top. I unscrewed the top dome and found that the metal seal with a rubber seal had worn away, there was a thin piece of rubber on the seal. Unfortunately, there is metal piece across the middle of the opening, which has a downward facing spring and a metal rod in the center to hold the valve in place. I tried cutting a tennis ball in half, but, I had to cut the tennis ball to fit around the metal rod. It did not work and my alternative is to disassemble the unit. Any suggestions?

  • This is going to need a picture. There are many valve designs, and we can't tell what you have. – JPhi1618 Oct 29 '19 at 17:49
  • 1
    It's an Apollo Model #4050500 with a serial #CD924. – Tim D Oct 29 '19 at 21:01
1

That sounds like the vacuum breaker valve that prevents back-flow. They are generally required by law in sprinkler systems. In 1996 our county started requiring spring loaded types. There are many designs . If you can't find a replacement part from the manufacturer , you may need to replace the valve. If you replace the valve , the city or county may want to inspect it.

| improve this answer | |
  • 1
    Most manufacturers have rebuild kits for them. – JRaef Oct 29 '19 at 19:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.