Hello, I have a Hayward Vari-Flo XL multiport valve (model sp0714t) and the pressure gauge is defective. I am looking to replace it but I want to be sure to get the right gauge. I called Hayward and they were of little help. Is there a part # for this gauge? Hayward sent me the diagram of the multiport valve with the parts listed but the gauge was not one of them. Any help would be greatly appreciated. Thanks!