I had found some but they are very expensive. I found a different type of vlave. This valve does not use a spring. It has a plunger. I ordered one on Monday. When It get here, I will install it and test it with water pressure. The true test will be while sitting in the water. The Lake is about 45 min away from me. I think it is worth the drive to test the new valve. If it works with the Tsunami 1200gph pump that I have, then I will order two more. If everything work great, I will post my finding and were to buy when the test is over.