preventing rust


LifeTime Supporter
May 8, 2007
Katy, TX
Below is an image of the float valve assembly in my autofill. As you can see, rust is beginning to form at the joint of the float arm and the valve. This happens to be my second assembly installed since my pool was built in July of last year. This particular one was installed only three weeks ago. Is there any way to prevent this other than replacing these parts with either higher quality stainless or nylon parts, such as applying some sort of lubricant (silicone, vaseline, etc.)?

I might add that my chemistry has been excellent since pool install (checked regularly)

FC 3-5
CC 0
pH 7.2-7.8
TA 70-90
CH 300
CYA 60-80
salt 3000-3500



LifeTime Supporter
Jul 27, 2007
Sahuarita, AZ
Hmm, thanks for the heads up... I had some non-stainless screws on some fixtures that the PB had to replace due to rust... I didn't check the auto-fill... I'll take a look at mine but am eager to hear the answer.